101
|
Prieto ML, O'Sullivan L, Tan SP, McLoughlin P, Hughes H, Gutierrez M, Lane JA, Hickey RM, Lawlor PG, Gardiner GE. In vitro assessment of marine Bacillus for use as livestock probiotics. Mar Drugs 2014; 12:2422-45. [PMID: 24796302 PMCID: PMC4052298 DOI: 10.3390/md12052422] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 02/06/2014] [Accepted: 04/01/2014] [Indexed: 12/23/2022] Open
Abstract
Six antimicrobial-producing seaweed-derived Bacillus strains were evaluated in vitro as animal probiotics, in comparison to two Bacillus from an EU-authorized animal probiotic product. Antimicrobial activity was demonstrated on solid media against porcine Salmonella and E. coli. The marine isolates were most active against the latter, had better activity than the commercial probiotics and Bacillus pumilus WIT 588 also reduced E. coli counts in broth. All of the marine Bacillus tolerated physiological concentrations of bile, with some as tolerant as one of the probiotics. Spore counts for all isolates remained almost constant during incubation in simulated gastric and ileum juices. All of the marine Bacillus grew anaerobically and the spores of all except one isolate germinated under anaerobic conditions. All were sensitive to a panel of antibiotics and none harbored Bacillus enterotoxin genes but all, except B. pumilus WIT 588, showed some degree of β-hemolysis. However, trypan blue dye exclusion and xCELLigence assays demonstrated a lack of toxicity in comparison to two pathogens; in fact, the commercial probiotics appeared more cytotoxic than the majority of the marine Bacillus. Overall, some of the marine-derived Bacillus, in particular B. pumilus WIT 588, demonstrate potential for use as livestock probiotics.
Collapse
Affiliation(s)
- Maria Luz Prieto
- Eco-Innovation Research Centre, Department of Chemical and Life Sciences, Waterford Institute of Technology, Waterford, Ireland.
| | - Laurie O'Sullivan
- Eco-Innovation Research Centre, Department of Chemical and Life Sciences, Waterford Institute of Technology, Waterford, Ireland.
| | - Shiau Pin Tan
- Eco-Innovation Research Centre, Department of Chemical and Life Sciences, Waterford Institute of Technology, Waterford, Ireland.
| | - Peter McLoughlin
- Eco-Innovation Research Centre, Department of Chemical and Life Sciences, Waterford Institute of Technology, Waterford, Ireland.
| | - Helen Hughes
- Eco-Innovation Research Centre, Department of Chemical and Life Sciences, Waterford Institute of Technology, Waterford, Ireland.
| | - Montserrat Gutierrez
- Veterinary Public Health Regulatory Laboratory, Department of Agriculture, Food and the Marine, Backweston Complex, Celbridge, Co. Kildare, Ireland.
| | - Jonathan A Lane
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland.
| | - Rita M Hickey
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland.
| | - Peadar G Lawlor
- Pig Development Department, Animal and Grassland Research and Innovation Centre, Teagasc, Moorepark, Fermoy, Co. Cork, Ireland.
| | - Gillian E Gardiner
- Eco-Innovation Research Centre, Department of Chemical and Life Sciences, Waterford Institute of Technology, Waterford, Ireland.
| |
Collapse
|
102
|
Martins A, Vieira H, Gaspar H, Santos S. Marketed marine natural products in the pharmaceutical and cosmeceutical industries: tips for success. Mar Drugs 2014; 12:1066-101. [PMID: 24549205 PMCID: PMC3944531 DOI: 10.3390/md12021066] [Citation(s) in RCA: 267] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/14/2014] [Accepted: 01/27/2014] [Indexed: 12/17/2022] Open
Abstract
The marine environment harbors a number of macro and micro organisms that have developed unique metabolic abilities to ensure their survival in diverse and hostile habitats, resulting in the biosynthesis of an array of secondary metabolites with specific activities. Several of these metabolites are high-value commercial products for the pharmaceutical and cosmeceutical industries. The aim of this review is to outline the paths of marine natural products discovery and development, with a special focus on the compounds that successfully reached the market and particularly looking at the approaches tackled by the pharmaceutical and cosmetic companies that succeeded in marketing those products. The main challenges faced during marine bioactives discovery and development programs were analyzed and grouped in three categories: biodiversity (accessibility to marine resources and efficient screening), supply and technical (sustainable production of the bioactives and knowledge of the mechanism of action) and market (processes, costs, partnerships and marketing). Tips to surpass these challenges are given in order to improve the market entry success rates of highly promising marine bioactives in the current pipelines, highlighting what can be learned from the successful and unsuccessful stories that can be applied to novel and/or ongoing marine natural products discovery and development programs.
Collapse
Affiliation(s)
- Ana Martins
- BIOALVO, S.A., Tec Labs Centro de Inovação, Campus da FCUL, Campo Grande, Lisboa 1749-016, Portugal.
| | - Helena Vieira
- BIOALVO, S.A., Tec Labs Centro de Inovação, Campus da FCUL, Campo Grande, Lisboa 1749-016, Portugal.
| | - Helena Gaspar
- Centro de Química e Bioquímica (CQB) and Departamento de Química e Bioquímica (DQB), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisboa 1749-016, Portugal.
| | - Susana Santos
- Centro de Química e Bioquímica (CQB) and Departamento de Química e Bioquímica (DQB), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisboa 1749-016, Portugal.
| |
Collapse
|
103
|
Murniasih T, . SK, . LK, . MH, . WP. An Antibacterial Compound Isolated from Sponge-associated bacteria Rhodobacteracea
bacterium. JOURNAL OF MEDICAL SCIENCES 2014. [DOI: 10.3923/jms.2014.75.80] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
104
|
Abbamondi GR, De Rosa S, Iodice C, Tommonaro G. Cyclic Dipeptides Produced by Marine Sponge-Associated Bacteria as Quorum Sensing Signals. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400900225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Four bacterial strains belonging to the genera Vibrio, Pseudoalteromonas and Photobacterium were isolated from the marine sponges Dysidea avara and Geodia cynodium. A Bacillus strain was isolated from Ircinia variabilis. A screening of molecules involved in quorum sensing (QS) was carried out by TLC-overlay and a new “plate T-streak” test. To analyze quorum quenching (QQ), a plate T-streak was performed with Chromobacterium violaceum. Strains of Vibrio isolated from both marine sponges and a strain of Photobacterium isolated from G. cynodium, activated QS bioreporters. A strain of Pseudoalteromonas isolated from D. avara showed QQ activity. Finally, it is reported that cyclic dipeptides isolated from strains of Vibrio sp. and Bacillus sp. (isolated from D. avara and I. variabilis, respectively) were involved in the QS mechanism. The simultaneous presence of bacteria that showed contrasting responses in bioassays for QS signal molecule synthesis in marine sponges could add an interesting dimension to the signalling interactions which may be happening in sponges.
Collapse
Affiliation(s)
| | - Salvatore De Rosa
- CNR - National Research Council of Italy- Institute of Biomolecular Chemistry, Pozzuoli (NA), Italy
| | - Carmine Iodice
- CNR - National Research Council of Italy- Institute of Biomolecular Chemistry, Pozzuoli (NA), Italy
| | - Giuseppina Tommonaro
- CNR - National Research Council of Italy- Institute of Biomolecular Chemistry, Pozzuoli (NA), Italy
| |
Collapse
|
105
|
Apoptogenic metabolites in fractions of the Benthic diatom Cocconeis scutellum parva. Mar Drugs 2014; 12:547-67. [PMID: 24451194 PMCID: PMC3917286 DOI: 10.3390/md12010547] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 01/09/2014] [Accepted: 01/15/2014] [Indexed: 12/12/2022] Open
Abstract
Benthic diatoms of the genus Cocconeis contain a specific apoptogenic activity. It triggers a fast destruction of the androgenic gland in the early post-larval life of the marine shrimp Hippolyte inermis, leading to the generation of small females. Previous in vitro investigations demonstrated that crude extracts of these diatoms specifically activate a dose-dependent apoptotic process in human cancer cells (BT20 breast carcinoma) but not in human normal lymphocytes. Here, a bioassay-guided fractionation has been performed to detect the apoptogenic compound(s). Various HPLC separation systems were needed to isolate the active fractions, since the apoptogenic metabolite is highly active, present in low amounts and is masked by abundant but non-active cellular compounds. The activity is due to at least two compounds characterized by different polarities, a hydrophilic and a lipophilic fraction. We purified the lipophilic fraction, which led to the characterization of an active sub-fraction containing a highly lipophilic compound, whose molecular structure has not yet been identified, but is under investigation. The results point to the possible medical uses of the active compound. Once the molecular structure has been identified, the study and modulation of apoptotic processes in various types of cells will be possible.
Collapse
|
106
|
Eom SH, Lee DS, Kang YM, Son KT, Jeon YJ, Kim YM. Application of yeast Candida utilis to ferment Eisenia bicyclis for enhanced antibacterial effect. Appl Biochem Biotechnol 2013; 171:569-82. [PMID: 23700145 DOI: 10.1007/s12010-013-0288-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Accepted: 05/06/2013] [Indexed: 12/23/2022]
Abstract
In this study, fermentation broth of Eisenia bicyclis with Candia utilis YM-1 exhibited enhanced antimicrobial activity against methicillin-resistant Staphylococcus aureus (MRSA) and food-borne pathogenic bacteria. To perform a more detailed investigation on the antibacterial activity, the fermented broth of E. bicyclis was extracted with methanol and further fractionated with organic solvents. After 1-day fermentation, the ethyl acetate (EtOAc)-soluble extract exhibited the highest anti-MRSA activity with minimum inhibitory concentration values ranging from 128 to 512 μg/mL, suggesting that the fermentation of E. bicyclis with C. utilis YM-1 may enhance antibacterial activity against MRSA. This effect was correlated to the result obtained by an increase in total phenolic contents in EtOAc-soluble extract. In addition, high-performance liquid chromatography analysis revealed that eckol, dieckol, dioxinodehydroeckol, and phlorofucofuroeckol-A contents in the EtOAc-soluble extract increased significantly. Thus, these results show that anti-MRSA activity of E. bicyclis fermented with C. utilis most likely originated from phlorotannins and allow the possible application of a variety of seaweed functional foods.
Collapse
Affiliation(s)
- Sung-Hwan Eom
- Department of Food Science and Technology, Pukyong National University, Busan, 608-737, Republic of Korea
| | | | | | | | | | | |
Collapse
|
107
|
Pseudoalteromonas spp. serve as initial bacterial attractants in mesocosms of coastal waters but have subsequent antifouling capacity in mesocosms and when embedded in paint. Appl Environ Microbiol 2013; 79:6885-93. [PMID: 23995925 DOI: 10.1128/aem.01987-13] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The purpose of the present study was to determine if the monoculture antifouling effect of several pigmented pseudoalteromonads was retained in in vitro mesocosm systems using natural coastal seawater and when the bacteria were embedded in paint used on surfaces submerged in coastal waters. Pseudoalteromonas piscicida survived on a steel surface and retained antifouling activity for at least 53 days in sterile seawater, whereas P. tunicata survived and had antifouling activity for only 1 week. However, during the first week, all Pseudoalteromonas strains facilitated rather than prevented bacterial attachment when used to coat stainless steel surfaces and submerged in mesocosms with natural seawater. The bacterial density on surfaces coated with sterile growth medium was 10(5) cells/cm(2) after 7 days, whereas counts on surfaces precoated with Pseudoalteromonas were significantly higher, at 10(6) to 10(8) cells/cm(2). However, after 53 days, seven of eight Pseudoalteromonas strains had reduced total bacterial adhesion compared to the control. P. piscicida, P. antarctica, and P. ulvae remained on the surface, at levels similar to those in the initial coating, whereas P. tunicata could not be detected. Larger fouling organisms were observed on all plates precoated with Pseudoalteromonas; however, plates coated only with sterile growth medium were dominated by a bacterial biofilm. Suspensions of a P. piscicida strain and a P. tunicata strain were incorporated into ship paints (Hempasil x3 87500 and Hempasil 77500) used on plates that were placed at the Hempel A/S test site in Jyllinge Harbor. For the first 4 months, no differences were observed between control plates and treated plates, but after 5 to 6 months, the control plates were more fouled than the plates with pseudoalteromonad-based paint. Our study demonstrates that no single laboratory assay can predict antifouling effects and that a combination of laboratory and real-life methods must be used to determine the potential antifouling capability of new agents or organisms.
Collapse
|
108
|
Das S, Goswami RK. Stereoselective Total Synthesis of Ieodomycins A and B and Revision of the NMR Spectroscopic Data of Ieodomycin B. J Org Chem 2013; 78:7274-80. [DOI: 10.1021/jo400929m] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sayantan Das
- Department of Organic Chemistry,
Indian Association
for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Rajib Kumar Goswami
- Department of Organic Chemistry,
Indian Association
for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| |
Collapse
|
109
|
Palomo S, González I, de la Cruz M, Martín J, Tormo JR, Anderson M, Hill RT, Vicente F, Reyes F, Genilloud O. Sponge-derived Kocuria and Micrococcus spp. as sources of the new thiazolyl peptide antibiotic kocurin. Mar Drugs 2013; 11:1071-86. [PMID: 23538871 PMCID: PMC3705389 DOI: 10.3390/md11041071] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 01/22/2013] [Accepted: 02/19/2013] [Indexed: 11/16/2022] Open
Abstract
Forty four marine actinomycetes of the family Microccocaceae isolated from sponges collected primarily in Florida Keys (USA) were selected from our strain collection to be studied as new sources for the production of bioactive natural products. A 16S rRNA gene based phylogenetic analysis showed that the strains are members of the genera Kocuria and Micrococcus. To assess their biosynthetic potential, the strains were PCR screened for the presence of secondary metabolite genes encoding nonribosomal synthetase (NRPS) and polyketide synthases (PKS). A small extract collection of 528 crude extracts generated from nutritional microfermentation arrays was tested for the production of bioactive secondary metabolites against clinically relevant strains (Bacillus subtilis, methicillin-resistant Staphylococcus aureus (MRSA), Acinetobacter baumannii and Candida albicans). Three independent isolates were shown to produce a new anti-MRSA bioactive compound that was identified as kocurin, a new member of the thiazolyl peptide family of antibiotics emphasizing the role of this family as a prolific resource for novel drugs.
Collapse
Affiliation(s)
- Sara Palomo
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
| | - Ignacio González
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
| | - Mercedes de la Cruz
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
| | - Jesús Martín
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
| | - José Rubén Tormo
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
| | - Matthew Anderson
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, 701 East Pratt Street, Baltimore, MD 21202, USA; E-Mails: (M.A.); (R.T.H.)
| | - Russell T. Hill
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, 701 East Pratt Street, Baltimore, MD 21202, USA; E-Mails: (M.A.); (R.T.H.)
| | - Francisca Vicente
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
| | - Fernando Reyes
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
| | - Olga Genilloud
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía. Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, E-18100 Armilla, Granada, Spain; E-Mails: (S.P.); (I.G.); (M.C.); (J.M.); (J.R.T.); (F.V.); (F.R.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +34-958-993-965; Fax: +34-958-846-710
| |
Collapse
|
110
|
Bao J, Zhang XY, Xu XY, He F, Nong XH, Qi SH. New cyclic tetrapeptides and asteltoxins from gorgonian-derived fungus Aspergillus sp. SCSGAF 0076. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
111
|
Cervia D, Catalani E, Belardinelli MC, Perrotta C, Picchietti S, Alimenti C, Casini G, Fausto AM, Vallesi A. The protein pheromone Er-1 of the ciliate Euplotes raikovi stimulates human T-cell activity: Involvement of interleukin-2 system. Exp Cell Res 2013; 319:56-67. [DOI: 10.1016/j.yexcr.2012.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 10/12/2012] [Accepted: 10/13/2012] [Indexed: 12/24/2022]
|
112
|
Montgomery K, Charlesworth JC, LeBard R, Visscher PT, Burns BP. Quorum sensing in extreme environments. Life (Basel) 2013; 3:131-48. [PMID: 25371335 PMCID: PMC4187201 DOI: 10.3390/life3010131] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 01/21/2013] [Accepted: 01/22/2013] [Indexed: 11/29/2022] Open
Abstract
Microbial communication, particularly that of quorum sensing, plays an important role in regulating gene expression in a range of organisms. Although this phenomenon has been well studied in relation to, for example, virulence gene regulation, the focus of this article is to review our understanding of the role of microbial communication in extreme environments. Cell signaling regulates many important microbial processes and may play a pivotal role in driving microbial functional diversity and ultimately ecosystem function in extreme environments. Several recent studies have characterized cell signaling in modern analogs to early Earth communities (microbial mats), and characterization of cell signaling systems in these communities may provide unique insights in understanding the microbial interactions involved in function and survival in extreme environments. Cell signaling is a fundamental process that may have co-evolved with communities and environmental conditions on the early Earth. Without cell signaling, evolutionary pressures may have even resulted in the extinction rather than evolution of certain microbial groups. One of the biggest challenges in extremophile biology is understanding how and why some microbial functional groups are located where logically they would not be expected to survive, and tightly regulated communication may be key. Finally, quorum sensing has been recently identified for the first time in archaea, and thus communication at multiple levels (potentially even inter-domain) may be fundamental in extreme environments.
Collapse
Affiliation(s)
- Kate Montgomery
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| | - James C Charlesworth
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Rebecca LeBard
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Pieter T Visscher
- Center for Integrative Geosciences, University of Connecticut 354 Mansfield Road, Storrs, CT 06269-2045, USA.
| | - Brendan P Burns
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
| |
Collapse
|
113
|
Lafleur J, Yasuda M, Shiaris M. Induction of resistance to Staphylococcus aureus in an environmental marine biofilm. J Microbiol Methods 2013; 93:68-71. [PMID: 23337813 DOI: 10.1016/j.mimet.2013.01.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 01/11/2013] [Accepted: 01/11/2013] [Indexed: 11/25/2022]
Abstract
The study of environmental biofilms is complicated by the difficulty of working with them under lab conditions. Nonetheless, knowledge of cellular activity and interactions within environmental biofilms could lead to novel biomedical applications. As a first step in this direction we propose a novel technique for inducing resistance to Staphylococcus aureus (S. aureus) in an intact environmental biofilm. Agar plates were prepared with or without the addition of 20% S. aureus spent culture media and immersed in coastal seawater (Boston Harbor, Massachusetts, USA) for four days to grow up an environmental biofilm. Nucleopore filters inoculated with an overnight culture of S. aureus were then applied to the surface of the agar plates with the environmental biofilms, incubated 4h at 37°C, removed and subsequently stained and analyzed. Marine environmental biofilms grown on agar containing S. aureus spent culture media were significantly more inhibitory of S. aureus growth than were marine environmental biofilms grown on plain agar.
Collapse
Affiliation(s)
- John Lafleur
- Warren Alpert School of Medicine, Emergency Medicine, Miriam Hospital, 164 Summit Ave., Providence, RI 02906, United States.
| | | | | |
Collapse
|
114
|
Fu P, Kong F, Wang Y, Wang Y, Liu P, Zuo G, Zhu W. Antibiotic Metabolites from the Coral-Associated ActinomyceteStreptomycessp. OUCMDZ-1703. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201201062] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
115
|
Dobretsov S, Abed RMM, Teplitski M. Mini-review: Inhibition of biofouling by marine microorganisms. BIOFOULING 2013; 29:423-41. [PMID: 23574279 DOI: 10.1080/08927014.2013.776042] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Any natural or artificial substratum exposed to seawater is quickly fouled by marine microorganisms and later by macrofouling species. Microfouling organisms on the surface of a substratum form heterogenic biofilms, which are composed of multiple species of heterotrophic bacteria, cyanobacteria, diatoms, protozoa and fungi. Biofilms on artificial structures create serious problems for industries worldwide, with effects including an increase in drag force and metal corrosion as well as a reduction in heat transfer efficiency. Additionally, microorganisms produce chemical compounds that may induce or inhibit settlement and growth of other fouling organisms. Since the last review by the first author on inhibition of biofouling by marine microbes in 2006, significant progress has been made in the field. Several antimicrobial, antialgal and antilarval compounds have been isolated from heterotrophic marine bacteria, cyanobacteria and fungi. Some of these compounds have multiple bioactivities. Microorganisms are able to disrupt biofilms by inhibition of bacterial signalling and production of enzymes that degrade bacterial signals and polymers. Epibiotic microorganisms associated with marine algae and invertebrates have a high antifouling (AF) potential, which can be used to solve biofouling problems in industry. However, more information about the production of AF compounds by marine microorganisms in situ and their mechanisms of action needs to be obtained. This review focuses on the AF activity of marine heterotrophic bacteria, cyanobacteria and fungi and covers publications from 2006 up to the end of 2012.
Collapse
Affiliation(s)
- Sergey Dobretsov
- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultan Qaboos University, Muscat, Sultanate of Oman.
| | | | | |
Collapse
|
116
|
Biotransformation and biocatalysis: roles and applications in the discovery of antimalarials. Future Med Chem 2012; 4:2325-36. [DOI: 10.4155/fmc.12.173] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Several strategies to discover new antimalarials have been proposed to augment and complement the conventional drug-discovery paradigm. One approach, which has not yet been fully exploited, is the use of drug biotransformation to identify new active molecules. This concept rests on the use of the biotransformation of drugs to their pharmacologically active metabolites. This approach has been used successfully in human chemotherapy, with the discovery and development of several metabolite-based drugs. This review looks at the contribution that biotransformations can play in antimalarial drug discovery.
Collapse
|
117
|
Assessment of the bacteriocinogenic potential of marine bacteria reveals lichenicidin production by seaweed-derived Bacillus spp. Mar Drugs 2012; 10:2280-2299. [PMID: 23170084 PMCID: PMC3497023 DOI: 10.3390/md10102280] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 09/17/2012] [Accepted: 10/08/2012] [Indexed: 12/03/2022] Open
Abstract
The objectives of this study were (1) to assess the bacteriocinogenic potential of bacteria derived mainly from seaweed, but also sand and seawater, (2) to identify at least some of the bacteriocins produced, if any and (3) to determine if they are unique to the marine environment and/or novel. Fifteen Bacillus licheniformis or pumilus isolates with antimicrobial activity against at least one of the indicator bacteria used were recovered. Some, at least, of the antimicrobials produced were bacteriocins, as they were proteinaceous and the producers displayed immunity. Screening with PCR primers for known Bacillus bacteriocins revealed that three seaweed-derived Bacillus licheniformis harbored the bli04127 gene which encodes one of the peptides of the two-peptide lantibiotic lichenicidin. Production of both lichenicidin peptides was then confirmed by mass spectrometry. This is the first definitive proof of bacteriocin production by seaweed-derived bacteria. The authors acknowledge that the bacteriocin produced has previously been discovered and is not unique to the marine environment. However, the other marine isolates likely produce novel bacteriocins, as none harboured genes for known Bacillus bacteriocins.
Collapse
|
118
|
Exploring anti-TB leads from natural products library originated from marine microbes and medicinal plants. Antonie van Leeuwenhoek 2012; 102:447-61. [DOI: 10.1007/s10482-012-9777-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 07/12/2012] [Indexed: 10/28/2022]
|
119
|
Abstract
AbstractSecondary metabolites obtained from Actinomycetales provide a potential source of many novel compounds with antibacterial, antitumour, antifungal, antiviral, antiparasitic and other properties. The majority of these compounds are widely used as medicines for combating multidrug-resistant Gram-positive and Gram-negative bacterial strains. Members of the genus Streptomyces are profile producers of previously-known secondary metabolites. Actinomycetes have been isolated from terrestrial soils, from the rhizospheres of plant roots, and recently from marine sediments. This review demonstrates the diversity of secondary metabolites produced by actinomycete strains with respect to their chemical structure, biological activity and origin. On the basis of this diversity, this review concludes that the discovery of new bioactive compounds will continue to pose a great challenge for scientists.
Collapse
|
120
|
Caballero-George C, Sorkalla T, Jakobs D, Bolaños J, Raja H, Shearer C, Bermingham E, Häberlein H. Fluorescence correlation spectroscopy in drug discovery: study of Alexa532-endothelin 1 binding to the endothelin ETA receptor to describe the pharmacological profile of natural products. ScientificWorldJournal 2012; 2012:524169. [PMID: 22623909 PMCID: PMC3353486 DOI: 10.1100/2012/524169] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 12/12/2011] [Indexed: 11/17/2022] Open
Abstract
Fluorescence correlation spectroscopy and the newly synthesized Alexa532-ET1 were used to study the dynamics of the endothelin ETA receptor-ligand complex alone and under the influence of a semisynthetic selective antagonist and a fungal extract on living A10 cells. Dose-dependent increase of inositol phosphate production was seen for Alexa532-ET1, and its binding was reduced to 8% by the selective endothelin ETA antagonist BQ-123, confirming the specific binding of Alexa532-ET1 to the endothelin ETA receptor. Two different lateral mobilities of the receptor-ligand complexes within the cell membrane were found allowing the discrimination of different states for this complex. BQ-123 showed a strong binding affinity to the “inactive” receptor state characterized by the slow diffusion time constant. A similar effect was observed for the fungal extract, which completely displaced Alexa532-ET1 from its binding to the “inactive” receptor state. These findings suggest that both BQ-123 and the fungal extract act as inverse agonists.
Collapse
Affiliation(s)
- Catherina Caballero-George
- Department of Molecular Pharmacology and Pharmacognosy, Drug Discovery Center, Institute for Scientific Research and High Technology Services, Panama City, Panama.
| | | | | | | | | | | | | | | |
Collapse
|
121
|
Duarte K, Rocha-Santos TA, Freitas AC, Duarte AC. Analytical techniques for discovery of bioactive compounds from marine fungi. Trends Analyt Chem 2012. [DOI: 10.1016/j.trac.2011.10.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
122
|
Induced Biofilm Cultivation Enhances Riboflavin Production by an Intertidally Derived Candida famata. Appl Biochem Biotechnol 2012; 166:1991-2006. [DOI: 10.1007/s12010-012-9626-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Accepted: 02/20/2012] [Indexed: 10/28/2022]
|
123
|
Takada Y, Umehara M, Katsumata R, Nakao Y, Kimura J. The total synthesis and structure–activity relationships of a highly cytotoxic depsipeptide kulokekahilide-2 and its analogs. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.094] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
124
|
Abstract
Covering: 2010. Previous review: Nat. Prod. Rep., 2011, 28, 196. This review covers the literature published in 2010 for marine natural products, with 895 citations (590 for the period January to December 2010) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1003 for 2010), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
Collapse
Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | | | | | | | | |
Collapse
|
125
|
Sima P, Vetvicka V. Bioactive substances with anti-neoplastic efficacy from marine invertebrates: Porifera and Coelenterata. World J Clin Oncol 2011; 2:355-61. [PMID: 22087433 PMCID: PMC3212816 DOI: 10.5306/wjco.v2.i11.355] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 10/10/2011] [Accepted: 10/17/2011] [Indexed: 02/06/2023] Open
Abstract
An ever increasing demand for new lead compounds in the pharmaceutical industry has led scientists to search for natural bioactive products. Based on this extensive research, marine invertebrates now represent a rich source of novel substances with significant anti-neoplastic activities. As the current approach of synthesizing new and chemically modifying old drugs seems to have slowed down, and the identification of new anticancer drugs is not too promising, a new approach is clearly needed. The objective of this review is to present up-to-date data on these newer compounds. Based on the data summarized in this short review, it is clear that marine invertebrates represent an extremely important source of compounds with potential anti-cancer effects. Considering that we tested only a tiny number of Porifera and Coelenterata, the best is yet to come.
Collapse
Affiliation(s)
- Peter Sima
- Peter Sima, Institute of Microbiology, Czech Academy of Sciences, 142 20 Prague 15400, Czech Republic
| | | |
Collapse
|
126
|
|
127
|
Imhoff JF, Labes A, Wiese J. Bio-mining the microbial treasures of the ocean: New natural products. Biotechnol Adv 2011; 29:468-82. [DOI: 10.1016/j.biotechadv.2011.03.001] [Citation(s) in RCA: 152] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 02/25/2011] [Accepted: 03/09/2011] [Indexed: 01/10/2023]
|
128
|
Vo TS, Ngo DH, Ta QV, Kim SK. Marine organisms as a therapeutic source against herpes simplex virus infection. Eur J Pharm Sci 2011; 44:11-20. [DOI: 10.1016/j.ejps.2011.07.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2011] [Accepted: 07/06/2011] [Indexed: 01/09/2023]
|
129
|
Penesyan A, Tebben J, Lee M, Thomas T, Kjelleberg S, Harder T, Egan S. Identification of the antibacterial compound produced by the marine epiphytic bacterium Pseudovibrio sp. D323 and related sponge-associated bacteria. Mar Drugs 2011; 9:1391-1402. [PMID: 21892353 PMCID: PMC3164381 DOI: 10.3390/md9081391] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2011] [Revised: 08/01/2011] [Accepted: 08/10/2011] [Indexed: 01/21/2023] Open
Abstract
Surface-associated marine bacteria often produce secondary metabolites with antagonistic activities. In this study, tropodithietic acid (TDA) was identified to be responsible for the antibacterial activity of the marine epiphytic bacterium Pseudovibrio sp. D323 and related strains. Phenol was also produced by these bacteria but was not directly related to the antibacterial activity. TDA was shown to effectively inhibit a range of marine bacteria from various phylogenetic groups. However TDA-producers themselves were resistant and are likely to possess resistance mechanism preventing autoinhibition. We propose that TDA in isolate D323 and related eukaryote-associated bacteria plays a role in defending the host organism against unwanted microbial colonisation and, possibly, bacterial pathogens.
Collapse
Affiliation(s)
- Anahit Penesyan
- School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-Innovation, University of New South Wales, Sydney 2052, New South Wales, Australia; E-Mails: (A.P.); (M.L.); (T.T.); (S.K.)
| | - Jan Tebben
- School of Biological, Earth and Environmental Sciences and Centre for Marine Bio-Innovation, University of New South Wales, Sydney 2052, New South Wales, Australia; E-Mails: (J.T.); (T.H.)
| | - Matthew Lee
- School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-Innovation, University of New South Wales, Sydney 2052, New South Wales, Australia; E-Mails: (A.P.); (M.L.); (T.T.); (S.K.)
| | - Torsten Thomas
- School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-Innovation, University of New South Wales, Sydney 2052, New South Wales, Australia; E-Mails: (A.P.); (M.L.); (T.T.); (S.K.)
| | - Staffan Kjelleberg
- School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-Innovation, University of New South Wales, Sydney 2052, New South Wales, Australia; E-Mails: (A.P.); (M.L.); (T.T.); (S.K.)
- Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, 60 Nanyang Drive, SBS-01n-42, 637551, Singapore
| | - Tilmann Harder
- School of Biological, Earth and Environmental Sciences and Centre for Marine Bio-Innovation, University of New South Wales, Sydney 2052, New South Wales, Australia; E-Mails: (J.T.); (T.H.)
| | - Suhelen Egan
- School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-Innovation, University of New South Wales, Sydney 2052, New South Wales, Australia; E-Mails: (A.P.); (M.L.); (T.T.); (S.K.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +61-2-9385-8569; Fax: +61-2-9385-1779
| |
Collapse
|
130
|
Antipathogenic potential of marine Bacillus sp. SS4 on N-acyl-homoserine-lactone-mediated virulence factors production in Pseudomonas aeruginosa (PAO1). J Biosci 2011; 36:55-67. [PMID: 21451248 DOI: 10.1007/s12038-011-9011-7] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Antipathogenic therapy is an outcome of the quorum-sensing inhibition (QSI) mechanism, which targets autoinducer-dependent virulent gene expression in bacterial pathogens. N-acyl homoserine lactone (AHL) acts as a key regulator in the production of virulence factors and biofilm formation in Pseudomonas aeruginosa PAO1 and violacein pigment production in Chromobacterium violaceum. In the present study, the marine bacterial strain SS4 showed potential QSI activity in a concentration-dependent manner (0.5-2 mg/ml) against the AHL-mediated violacein production in C. violaceum (33-86%) and biofilm formation (33-88%), total protease (20-65%), LasA protease (59-68%), LasB elastase (36-68%), pyocyanin (17-86%) and pyoverdin productions in PAO1. The light and confocal laser scanning microscopic analyses confirmed the reduction of the biofilm-forming ability of PAO1 when treated with SS4 extract. Furthermore, the antibiofilm potential was confirmed through static biofilm ring assay, in which ethyl acetate extract of SS4 showed concentration-dependent reduction in the biofilm-forming ability of PAO1. Thus, the result of this study clearly reveals the antipathogenic and antibiofilm properties of the bacterial isolate SS4. Through 16S rDNA analysis, the strain SS4 was identified as Bacillus sp. (GenBank Accession Number: GU471751).
Collapse
|
131
|
A survey of marine natural compounds and their derivatives with anti-cancer activity reported in 2010. Molecules 2011; 16:5629-46. [PMID: 21993222 PMCID: PMC6264395 DOI: 10.3390/molecules16075629] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 05/31/2011] [Accepted: 05/31/2011] [Indexed: 12/12/2022] Open
Abstract
Although considerable progress in oncology therapeutics has been achieved in the last century, cancer remains one of major death causes in the World and for this reason, the development of novel cancer drugs remains a pressing need. Natural marine compounds represent an interesting source of novel leads with potent chemotherapeutic or chemo-preventive activities. In the last decades, structure-activity-relationship studies have led to the development of naturally-derived or semi-synthetic analogues with improved bioactivity, a simplified synthetic target or less toxicity. We aim here to review a selection of natural compounds with reported anticancer activity isolated of marine sources and their associated analogues published in 2010.
Collapse
|
132
|
Cellulase and xylanase activity in relation to biofilm formation by two intertidal filamentous fungi in a novel polymethylmethacrylate conico-cylindrical flask. Bioprocess Biosyst Eng 2011; 34:1087-101. [DOI: 10.1007/s00449-011-0559-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 05/23/2011] [Indexed: 11/26/2022]
|
133
|
Lordan S, Ross RP, Stanton C. Marine bioactives as functional food ingredients: potential to reduce the incidence of chronic diseases. Mar Drugs 2011; 9:1056-1100. [PMID: 21747748 PMCID: PMC3131561 DOI: 10.3390/md9061056] [Citation(s) in RCA: 326] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2011] [Revised: 06/02/2011] [Accepted: 06/08/2011] [Indexed: 12/31/2022] Open
Abstract
The marine environment represents a relatively untapped source of functional ingredients that can be applied to various aspects of food processing, storage, and fortification. Moreover, numerous marine-based compounds have been identified as having diverse biological activities, with some reported to interfere with the pathogenesis of diseases. Bioactive peptides isolated from fish protein hydrolysates as well as algal fucans, galactans and alginates have been shown to possess anticoagulant, anticancer and hypocholesterolemic activities. Additionally, fish oils and marine bacteria are excellent sources of omega-3 fatty acids, while crustaceans and seaweeds contain powerful antioxidants such as carotenoids and phenolic compounds. On the basis of their bioactive properties, this review focuses on the potential use of marine-derived compounds as functional food ingredients for health maintenance and the prevention of chronic diseases.
Collapse
Affiliation(s)
- Sinéad Lordan
- Teagasc Food Research Centre Moorepark, Fermoy, Co. Cork, Ireland; E-Mails: (S.L.); (R.P.R.)
| | - R. Paul Ross
- Teagasc Food Research Centre Moorepark, Fermoy, Co. Cork, Ireland; E-Mails: (S.L.); (R.P.R.)
| | - Catherine Stanton
- Teagasc Food Research Centre Moorepark, Fermoy, Co. Cork, Ireland; E-Mails: (S.L.); (R.P.R.)
| |
Collapse
|
134
|
Gold from the sea: marine compounds as inhibitors of the hallmarks of cancer. Biotechnol Adv 2011; 29:531-47. [PMID: 21371549 DOI: 10.1016/j.biotechadv.2011.02.002] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 02/17/2011] [Accepted: 02/22/2011] [Indexed: 12/12/2022]
Abstract
Cancer is one of the most deadly diseases in the world. Although advances in the field of chemo-preventive and therapeutic medicine have been made regularly over the last ten years, the search for novel anticancer treatments continues. In this field, the marine environment, with its rich variety of organisms, is a largely untapped source of novel compounds with potent antitumor activity. Although many reviews of marine anticancer compounds have been published, we focus here on selected marine compounds that act on the six hallmarks of cancer presented namely self-sufficiency in growth signals, insensitivity to anti-growth signals, evasion of apoptosis, limitless replication, sustained angiogenesis and tissue invasion and metastasis.
Collapse
|
135
|
Zhuang Y, Teng X, Wang Y, Liu P, Li G, Zhu W. New quinazolinone alkaloids within rare amino acid residue from coral-associated fungus, Aspergillus versicolor LCJ-5-4. Org Lett 2011; 13:1130-3. [PMID: 21271733 DOI: 10.1021/ol103164n] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cottoquinazoline D (3), a new alkaloid with a 1-aminocyclopropane-1-carboxylic acid residue rarely discovered in nature, was isolated and identified together with two new quinazolinone alkaloids, cottoquinazolines B (1) and C (2), from coral-associated fungus Aspergillus versicolor LCJ-5-4. Their structures including absolute configurations were elucidated based on spectroscopic methods, X-ray single crystal diffraction analysis, and chemical methods. A possible biogenetic pathway for them was proposed.
Collapse
Affiliation(s)
- Yibin Zhuang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, Peoples' Republic of China
| | | | | | | | | | | |
Collapse
|
136
|
Mitra S, Sarkar S, Gachhui R, Mukherjee J. A novel conico-cylindrical flask aids easy identification of critical process parameters for cultivation of marine bacteria. Appl Microbiol Biotechnol 2011; 90:321-30. [PMID: 21210106 DOI: 10.1007/s00253-010-3041-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 11/23/2010] [Accepted: 11/24/2010] [Indexed: 10/18/2022]
Abstract
A polymethylmethacrylate (PMMA) conico-cylindrical flask (CCF) with an inner arrangement consisting of eight equidistantly spaced rectangular strips mounted radially on a circular disk to provide additional surface area for microbial attachment and ports to allow air supply was employed for melanin production by Shewanella colwelliana and antibiotic production by Pseudoalteromonas rubra. The design allowed comparison of production between (1) CCF with hydrophobic surface (PMMA-CCF), (2) CCF with hydrophilic glass surface (GS-CCF), and (3) standard unbaffled Erlenmeyer flask (EF). Melanin production in the PMMA-CCF was higher by at most 33.5% and growth of S. colwelliana by at most 309.2% compared to the other vessels. Melanin synthesis was positively correlated with reactor surface area and hydrophobicity, suspended cell growth, and biofilm formation. Antibiotic production in the EF was higher by at most 83.3%, but growth of P. rubra was higher in the PMMA-CCF by at most 54.5% compared to the other vessels. A hydrophilic vessel surface, abundant air supply, but low shear stress enhanced antibiotic production. The CCF together with the EF allowed identification of the crucial parameters (vessel surface characteristics, growth, biofilm formation, and aeration) influencing productivity, knowledge of which in the initial stages of process development will facilitate informed decisions at the later phases.
Collapse
Affiliation(s)
- Sayani Mitra
- School of Environmental Studies, Jadavpur University, Kolkata, 700 032, India
| | | | | | | |
Collapse
|
137
|
Sarkar S, Roy D, Mukherjee J. Enhanced protease production in a polymethylmethacrylate conico-cylindrical flask by two biofilm-forming bacteria. BIORESOURCE TECHNOLOGY 2011; 102:1849-1855. [PMID: 20947343 DOI: 10.1016/j.biortech.2010.09.091] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 09/22/2010] [Accepted: 09/23/2010] [Indexed: 05/30/2023]
Abstract
A polymethylmethacrylate (PMMA) conico-cylindrical flask (CCF) with an inner arrangement consisting of eight equidistantly spaced rectangular strips mounted radially on a circular disk to provide additional surface area for microbial attachment was employed for protease production by two biofilm-forming bacteria, an intertidal gamma-Proteobacterium (DGII) and a chicken meat isolate, Virgibacillus pantothenticus. The flask design allowed comparison of protease production during cultivation with a hydrophilic (glass) or hydrophobic (PMMA) surface. Compared to the Erlenmeyer flask, the CCF allowed protease production that was 30% and 35% higher and growth that was 20% and 345% higher for DGII and V. pantothenticus, respectively. Protease production increased by 202% and 22% and growth by 19,275% and 940% for DGII and V. pantothenticus, respectively, in the presence of a hydrophobic as compared to a hydrophilic surface. This investigation pioneers the application of a vessel beyond the traditional shake-flask for enhancing protease production by biofilm-formers.
Collapse
Affiliation(s)
- Sreyashi Sarkar
- School of Environmental Studies, Department of Chemical Engineering, Jadavpur University, Kolkata 700 032, India
| | | | | |
Collapse
|
138
|
|
139
|
Antidiatom and antibacterial activity of epiphytic bacteria isolated from Ulva lactuca in tropical waters. World J Microbiol Biotechnol 2010. [DOI: 10.1007/s11274-010-0606-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|