1
|
Sharin T, Leinen LJ, Schreiber D, Swenson VA, Emsley SA, Trammell EJ, Videau P, Crump D, Gaylor MO. Description of Solvent-Extractable Chemicals in Thermal Receipts and Toxicological Assessment of Bisphenol S and Diphenyl Sulfone. Bull Environ Contam Toxicol 2024; 112:63. [PMID: 38615298 DOI: 10.1007/s00128-024-03871-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 02/16/2024] [Indexed: 04/15/2024]
Abstract
Research on thermal receipts has previously focused on the toxic effects of dermal exposure from the most publicized developers (e.g., bisphenol A (BPA) and bisphenol S (BPS)), while no studies have reported on the other solvent-extractable compounds therein. Diphenyl sulfone (DPS) is a sensitizer added to thermal receipts, but little is known about DPS concentrations in receipts or potential toxicity. Here, we quantified BPA, BPS, and DPS concentrations and tentatively identified the solvent-extractable compounds of thermal receipts collected from three South Dakota (USA) cities during 2016-2017. An immortalized chicken hepatic cell line, cultured as 3D spheroids, was used to screen effects of DPS, BPS, and 17ß estradiol (E2; 0.1-1000 µM) on cell viability and gene expression changes. These chemicals elicited limited cytotoxicity with LC50 values ranging from 113 to 143 µM, and induced dysregulation in genes associated with lipid and bile acid homeostasis. Taken together, this study generated novel information on solvent-extractable chemicals from thermal receipts and toxicity data for DPS.
Collapse
Affiliation(s)
- Tasnia Sharin
- National Wildlife Research Centre, Environment and Climate Change Canada, Ottawa, ON, K1A 0H3, Canada
| | - Lucas J Leinen
- Department of Chemistry, Dakota State University, Madison, SD, USA
| | - David Schreiber
- Department of Chemistry, Dakota State University, Madison, SD, USA
| | - Vaille A Swenson
- Department of Chemistry, Dakota State University, Madison, SD, USA
- Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN, USA
| | - Sarah A Emsley
- Department of Biology, Southern Oregon University, Ashland, OR, USA
| | - E Jamie Trammell
- Environmental Science and Policy Program, Southern Oregon University, Ashland, OR, USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR, USA.
| | - Doug Crump
- National Wildlife Research Centre, Environment and Climate Change Canada, Ottawa, ON, K1A 0H3, Canada.
| | - Michael O Gaylor
- Department of Chemistry, Dakota State University, Madison, SD, USA.
- Bayer Crop Science, Chesterfield, MO, USA.
| |
Collapse
|
2
|
Weatherup EF, Videau P, Ushijima B. Genome sequence of Alteromonas macleodii strain OCN004 isolated from the extracellular mucus of an apparently healthy rice coral ( Montipora capitata). Microbiol Resour Announc 2024; 13:e0007924. [PMID: 38393331 PMCID: PMC11008196 DOI: 10.1128/mra.00079-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024] Open
Abstract
Alteromonas macleodii strain OCN004, a marine gammaproteobacterium in the Alteromonadaceae family, has primarily been studied as a non-pathogenic negative control bacterium during laboratory infection trials to test the virulence of bacterial coral pathogens. The draft genome sequence of A. macleodii strain OCN004 is presented here.
Collapse
Affiliation(s)
- Elizabeth F. Weatherup
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, North Carolina, USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, Oregon, USA
| | - Blake Ushijima
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, North Carolina, USA
| |
Collapse
|
3
|
Emsley SA, Loughran RM, Shlafstein MD, Pfannmuller KM, De La Flor YT, Lein CG, Dove NC, Koyack MJ, Oline DK, Hanson TE, Videau P, Saw JH, Ushijima B. Fluctibacter corallii gen. nov., sp. nov., isolated from the coral Montipora capitata on a reef in Kāne'ohe Bay, O'ahu, Hawai'i, reclassification of Aestuariibacter halophilus as Fluctibacter halophilus comb. nov., and Paraglaciecola oceanifecundans as a later heterotypic synonym of Paraglaciecola agarilytica. Antonie Van Leeuwenhoek 2024; 117:45. [PMID: 38424217 DOI: 10.1007/s10482-024-01934-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 01/25/2024] [Indexed: 03/02/2024]
Abstract
Strain AA17T was isolated from an apparently healthy fragment of Montipora capitata coral from the reef surrounding Moku o Lo'e in Kāne'ohe Bay, O'ahu, Hawai'i, USA, and was taxonomically evaluated using a polyphasic approach. Comparison of a partial 16S rRNA gene sequence found that strain AA17T shared the greatest similarity with Aestuariibacter halophilus JC2043T (96.6%), and phylogenies based on 16S rRNA gene sequences grouped strain AA17T with members of the Aliiglaciecola, Aestuariibacter, Lacimicrobium, Marisediminitalea, Planctobacterium, and Saliniradius genera. To more precisely infer the taxonomy of strain AA17T, a phylogenomic analysis was conducted and indicated that strain AA17T formed a monophyletic clade with A. halophilus JC2043T, divergent from Aestuariibacter salexigens JC2042T and other related genera. As a result of monophyly and multiple genomic metrics of genus demarcation, strain AA17T and A. halophilus JC2043T comprise a distinct genus for which the name Fluctibacter gen. nov. is proposed. Based on a polyphasic characterisation and identifying differences in genomic and taxonomic data, strain AA17T represents a novel species, for which the name Fluctibacter corallii sp. nov. is proposed. The type strain is AA17T (= LMG 32603 T = NCTC 14664T). This work also supports the reclassification of A. halophilus as Fluctibacter halophilus comb. nov., which is the type species of the Fluctibacter genus. Genomic analyses also support the reclassification of Paraglaciecola oceanifecundans as a later heterotypic synonym of Paraglaciecola agarilytica.
Collapse
Affiliation(s)
- Sarah A Emsley
- Department of Biology, Southern Oregon University, Ashland, OR, USA
| | - Rachel M Loughran
- Microbiology Graduate Program, University of Delaware, Newark, DE, USA
| | | | | | - Yesmarie T De La Flor
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, USA
| | | | | | - Marc J Koyack
- School of Arts and Sciences, Gwynedd Mercy University, Gwynedd Valley, PA, USA
| | - David K Oline
- Department of Biology, Southern Oregon University, Ashland, OR, USA
| | - Thomas E Hanson
- Microbiology Graduate Program, University of Delaware, Newark, DE, USA
- School of Marine Science and Policy and Delaware Biotechnology Institute, University of Delaware, Delaware, USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR, USA
- AgBiome, Research Triangle Park, NC, USA
| | - Jimmy H Saw
- Department of Biological Sciences, The George Washington University, Washington, DC, USA.
| | - Blake Ushijima
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, USA.
| |
Collapse
|
4
|
Goh YJ, DeYoung BJ, Dove NC, Johnson BR, Martz MK, Mel M, Videau P. Harnessing the microbial world for human benefit. Trends Biotechnol 2024; 42:382-383. [PMID: 38008689 DOI: 10.1016/j.tibtech.2023.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/28/2023]
Affiliation(s)
| | | | | | | | | | - Matilda Mel
- AgBiome, Inc., Research Triangle Park, NC, USA
| | | |
Collapse
|
5
|
Hoffman TR, Emsley SA, Douglas JC, Reed KR, Esquivel AR, Koyack MJ, Paddock BE, Videau P. Assessing Curcumin Uptake and Clearance and Their Influence on Superoxide Dismutase Activity in Drosophila melanogaster. BioTech (Basel) 2023; 12:58. [PMID: 37754202 PMCID: PMC10526445 DOI: 10.3390/biotech12030058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 08/25/2023] [Accepted: 09/04/2023] [Indexed: 09/28/2023] Open
Abstract
While normal levels of reactive oxygen and nitrogen species (RONS) are required for proper organismal function, increased levels result in oxidative stress. Oxidative stress may be managed via the scavenging activities of antioxidants (e.g., curcumin) and the action of enzymes, including superoxide dismutase (SOD). In this work, the uptake and clearance of dietary curcuminoids (consisting of curcumin, demethoxycurcumin, and bisdemethoxycurcumin) was assessed in Drosophila melanogaster larvae following chronic or acute exposure. High levels of curcuminoid uptake and loss were observed within a few hours and leveled off within eight hours post treatment onset. The addition or removal of curcuminoids from media resulted in corresponding changes in SOD activity, and the involvement of each of the three SOD genes was assessed for their contribution to total SOD activity. Taken together, these data provide insight into the uptake and clearance dynamics of curcuminoids and indicate that, while SOD activity generally increases following curcuminoid treatment, the individual SOD genes appear to contribute differently to this response.
Collapse
Affiliation(s)
- Tammy R. Hoffman
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Sarah A. Emsley
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Jenna C. Douglas
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Kaela R. Reed
- Department of Chemistry, Southern Oregon University, Ashland, OR 97520, USA
| | - Abigail R. Esquivel
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33602, USA
| | - Marc J. Koyack
- School of Arts and Sciences, Gwynedd Mercy University, Gwynedd Valley, PA 19437, USA
| | - Brie E. Paddock
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| |
Collapse
|
6
|
Loughran RM, Emsley SA, Jefferson T, Wasson BJ, Deadmond MC, Knauss TL, Pfannmuller KM, Lippert KJ, Miller G, Cline LC, Oline DK, Koyack MJ, Grant-Beurmann S, Gaylor MO, Saw JH, Ushijima B, Videau P. Vibrio tetraodonis subsp. pristinus subsp. nov., isolated from the coral Acropora cytherea at Palmyra Atoll, and creation and emended description of Vibrio tetraodonis subsp. tetraodonis subsp. nov. Antonie Van Leeuwenhoek 2022; 115:1215-1228. [PMID: 35920985 DOI: 10.1007/s10482-022-01766-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 07/10/2022] [Indexed: 11/30/2022]
Abstract
Strain OCN044T was isolated from the homogenised tissue and mucus of an apparently healthy Acropora cytherea coral fragment collected from the western reef terrace of Palmyra Atoll in the Northern Line Islands and was taxonomically evaluated with a polyphasic approach. The morphological and chemotaxonomic properties are consistent with characteristics of the genus Vibrio: Gram-stain-negative rods, oxidase- and catalase-positive, and motile by means of a polar flagellum. Strain OCN044T can be differentiated as a novel subspecies based on 21 differences among chemotaxonomic features (e.g., fatty acids percentages for C12:0 and C18:1 ω7c), enzymatic activities (e.g., DNase and cystine arylamidase), and carbon sources utilized (e.g., L-xylose and D-melezitose) from its nearest genetic relative. Phylogenetic analysis and genomic comparisons show close evolutionary relatedness to Vibrio tetraodonis A511T but the overall genomic relatedness indices identify strain OCN044T as a distinct subspecies. Based on a polyphasic characterisation, differences in genomic and taxonomic data, strain OCN044T represents a novel subspecies of V. tetraodonis A511T, for which the name Vibrio tetraodonis subsp. pristinus subsp. nov. is proposed. The type strain is OCN044T (= LMG 31895T = DSM 111778T).
Collapse
Affiliation(s)
- Rachel M Loughran
- Department of Biology, Southern Oregon University, Ashland, OR, USA.,Microbiology Graduate Program, University of Delaware, Newark, DE, USA
| | - Sarah A Emsley
- Department of Biology, Southern Oregon University, Ashland, OR, USA
| | - Tori Jefferson
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, USA
| | | | | | - Taylor L Knauss
- Department of Biology, Southern Oregon University, Ashland, OR, USA
| | | | - Katherine J Lippert
- Department of Biology, Southern Oregon University, Ashland, OR, USA.,Triplebar, Emeryville, CA, USA
| | - Gregory Miller
- Natural Sciences Department, Flagler College, St. Augustine, FL, USA
| | | | - David K Oline
- Department of Biology, Southern Oregon University, Ashland, OR, USA
| | - Marc J Koyack
- Department of Chemistry, Southern Oregon University, Ashland, OR, USA
| | - Silvia Grant-Beurmann
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michael O Gaylor
- Department of Chemistry, Dakota State University, Madison, SD, USA
| | - Jimmy H Saw
- Department of Biological Sciences, The George Washington University, Washington, D.C, USA
| | - Blake Ushijima
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, USA.
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR, USA. .,Bayer Crop Science, Chesterfield, MO, USA.
| |
Collapse
|
7
|
Ushijima B, Saw JH, Videau P, Häse CC. Comparison of Vibrio coralliilyticus virulence in Pacific oyster larvae and corals. Microbiology (Reading) 2022; 168. [PMID: 35380530 DOI: 10.1099/mic.0.001169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The bacterium Vibrio coralliilyticus has been implicated in mass mortalities of corals and shellfish larvae. However, using corals for manipulative infection experiments can be logistically difficult compared to other model organisms, so we aimed to establish oyster larvae infections as a proxy model. Therefore, this study assessed the virulence of six wild-type V. coralliilyticus strains, and mutants of one strain with deletions of known virulence factors, between Pacific oyster larvae (Crassostrea gigas) and Hawaiian rice coral (Montipora capitata) infection systems. The wild-type strains tested displayed variable virulence in each system, but virulence levels between hosts were not necessarily comparable. Strains RE98 and OCN008 maintained a medium to high level of virulence across hosts and appeared to be more generalist pathogens. Strain H1, in contrast, was avirulent towards coral but displayed a medium level of virulence towards oyster larvae. Interestingly, the BAA-450 type strain had a medium level of virulence towards coral and was the least virulent to oyster larvae. A comparison of known virulence factors determined that the flagellum, motility or chemotaxis, all of which play a significant role in coral infections, were not crucial for oyster infections with strain OCN008. A genomic comparison of the newly sequenced strain H1 with the other strains tested identified 16 genes potentially specific to coral pathogens that were absent in H1. This is both the first comparison of various V. coralliilyticus strains across infection systems and the first investigation of a strain that is non-virulent to coral. Our results indicate that the virulence of V. coralliilyticus strains in coral is not necessarily indicative of virulence in oyster larvae, and that the set of genes tested are not required for virulence in both model systems. This study increases our understanding of the virulence between V. coralliilyticus strains and helps assess their potential threat to marine environments and shellfish industries.
Collapse
Affiliation(s)
- Blake Ushijima
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, USA
| | - Jimmy H Saw
- Department of Biological Sciences, The George Washington University, Washington, DC, USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR, USA
- Present address: Bayer Crop Science, MO, Chesterfield, USA
| | - Claudia C Häse
- Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| |
Collapse
|
8
|
González Henao S, Karanauskas V, Drummond SM, Dewitt LR, Maloney CM, Mulu C, Weber JM, Barge LM, Videau P, Gaylor MO. Planetary Minerals Catalyze Conversion of a Polycyclic Aromatic Hydrocarbon to a Prebiotic Quinone: Implications for Origins of Life. Astrobiology 2022; 22:197-209. [PMID: 35100015 DOI: 10.1089/ast.2021.0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in astrochemical environments and are disbursed into planetary environments via meteorites and extraterrestrial infall where they may interact with mineral phases to produce quinones important for origins of life. In this study, we assessed the potential of the phyllosilicates montmorillonite (MONT) and kaolinite (KAO), and the enhanced Mojave Mars Simulant (MMS) to convert the PAH anthracene (ANTH) to the biologically important 9,10-anthraquinone (ANTHQ). All studied mineral substrates mediate conversion over the temperature range assessed (25-500°C). Apparent rate curves for conversion were sigmoidal for MONT and KAO, but quadratic for MMS. Conversion efficiency maxima for ANTHQ were 3.06% ± 0.42%, 1.15% ± 0.13%, and 0.56% ± 0.039% for MONT, KAO, and MMS, respectively. We hypothesized that differential substrate binding and compound loss account for the apparent conversion kinetics observed. Apparent loss rate curves for ANTH and ANTHQ were exponential for all substrates, suggesting a pathway for wide distribution of both compounds in warmer prebiotic environments. These findings improve upon our previously reported ANTHQ conversion efficiency on MONT and provide support for a plausible scenario in which PAH-mineral interactions could have produced prebiotically relevant quinones in early Earth environments.
Collapse
Affiliation(s)
| | | | - Samuel M Drummond
- Department of Chemistry, Dakota State University, Madison, South Dakota, USA
| | - Lillian R Dewitt
- Department of Chemistry, Dakota State University, Madison, South Dakota, USA
| | | | - Christina Mulu
- Department of Chemistry, Dakota State University, Madison, South Dakota, USA
| | - Jessica M Weber
- NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
| | - Laura M Barge
- NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, Oregon, USA
| | - Michael O Gaylor
- Department of Chemistry, Dakota State University, Madison, South Dakota, USA
| |
Collapse
|
9
|
Gaylor MO, Miro P, Vlaisavljevich B, Kondage AAS, Barge LM, Omran A, Videau P, Swenson VA, Leinen LJ, Fitch NW, Cole KL, Stone C, Drummond SM, Rageth K, Dewitt LR, González Henao S, Karanauskus V. Plausible Emergence and Self Assembly of a Primitive Phospholipid from Reduced Phosphorus on the Primordial Earth. ORIGINS LIFE EVOL B 2021; 51:185-213. [PMID: 34279769 DOI: 10.1007/s11084-021-09613-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 06/19/2021] [Indexed: 11/28/2022]
Abstract
How life arose on the primitive Earth is one of the biggest questions in science. Biomolecular emergence scenarios have proliferated in the literature but accounting for the ubiquity of oxidized (+ 5) phosphate (PO43-) in extant biochemistries has been challenging due to the dearth of phosphate and molecular oxygen on the primordial Earth. A compelling body of work suggests that exogenous schreibersite ((Fe,Ni)3P) was delivered to Earth via meteorite impacts during the Heavy Bombardment (ca. 4.1-3.8 Gya) and there converted to reduced P oxyanions (e.g., phosphite (HPO32-) and hypophosphite (H2PO2-)) and phosphonates. Inspired by this idea, we review the relevant literature to deduce a plausible reduced phospholipid analog of modern phosphatidylcholines that could have emerged in a primordial hydrothermal setting. A shallow alkaline lacustrine basin underlain by active hydrothermal fissures and meteoritic schreibersite-, clay-, and metal-enriched sediments is envisioned. The water column is laden with known and putative primordial hydrothermal reagents. Small system dimensions and thermal- and UV-driven evaporation further concentrate chemical precursors. We hypothesize that a reduced phospholipid arises from Fischer-Tropsch-type (FTT) production of a C8 alkanoic acid, which condenses with an organophosphinate (derived from schreibersite corrosion to hypophosphite with subsequent methylation/oxidation), to yield a reduced protophospholipid. This then condenses with an α-amino nitrile (derived from Strecker-type reactions) to form the polar head. Preliminary modeling results indicate that reduced phospholipids do not aggregate rapidly; however, single layer micelles are stable up to aggregates with approximately 100 molecules.
Collapse
Affiliation(s)
- Michael O Gaylor
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA.
| | - Pere Miro
- Department of Chemistry, University of South Dakota, Vermillion, SD, 57069, USA
| | - Bess Vlaisavljevich
- Department of Chemistry, University of South Dakota, Vermillion, SD, 57069, USA
| | | | - Laura M Barge
- NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 91109, USA
| | - Arthur Omran
- School of Geosciences, University of South Florida, Tampa, FL, 33620, USA.,Department of Chemistry, University of North Florida, Jacksonville, FL, 32224, USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR, 97520, USA.,Bayer Crop Science, Chesterfield, MO, 63017, USA
| | - Vaille A Swenson
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA.,Department of Molecular Medicine, Mayo Clinic, Rochester, MN, 55905, USA
| | - Lucas J Leinen
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | - Nathaniel W Fitch
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | - Krista L Cole
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | - Chris Stone
- Department of Biology, Southern Oregon University, Ashland, OR, 97520, USA
| | - Samuel M Drummond
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | - Kayli Rageth
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | - Lillian R Dewitt
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | | | | |
Collapse
|
10
|
Esquivel AR, Douglas JC, Loughran RM, Rezendes TE, Reed KR, Cains THL, Emsley SA, Paddock WA, Videau P, Koyack MJ, Paddock BE. Assessing the influence of curcumin in sex-specific oxidative stress, survival and behavior in Drosophila melanogaster. J Exp Biol 2020; 223:jeb223867. [PMID: 33037110 DOI: 10.1242/jeb.223867] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 09/30/2020] [Indexed: 11/20/2022]
Abstract
Oxidative stress, which occurs from an imbalance of reactive oxygen and nitrogen species (RONS) and both endogenous and exogenous antioxidants, promotes aging and underlies sex-specific differences in longevity and susceptibility to age-related neurodegeneration. Recent evidence suggests that curcumin, a yellow pigment derived from turmeric and shown to exhibit antioxidant properties as a RONS scavenger, influences the regulation of genetic elements in endogenous antioxidant pathways. To investigate the role of curcumin in sex-specific in vivo responses to oxidative stress, Drosophila were reared on media supplemented with 0.25, 2.5 or 25 mmol l-1 curcuminoids (consisting of curcumin, demethoxycurcumin and bisdemethoxycurcumin) and resistance to oxidative stress and neural parameters were assessed. High levels of curcuminoids exhibited two sex-specific effects: protection from hydrogen peroxide as an oxidative stressor and alterations in turning rate in an open field. Taken together, these results suggest that the influence of curcuminoids as antioxidants probably relies on changes in gene expression and that sexual dimorphism exists in the in vivo response to curcuminoids.
Collapse
Affiliation(s)
- Abigail R Esquivel
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Jenna C Douglas
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Rachel M Loughran
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Thomas E Rezendes
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Kaela R Reed
- Department of Chemistry, Southern Oregon University, Ashland, OR 97520, USA
| | - Tobias H L Cains
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Sarah A Emsley
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - William A Paddock
- Department of Institutional Research, Arcadia University, Glenside, PA 19038 USA
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| | - Marc J Koyack
- Department of Chemistry, Southern Oregon University, Ashland, OR 97520, USA
| | - Brie E Paddock
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA
| |
Collapse
|
11
|
Videau P, Wells KN, Singh AJ, Eiting J, Proteau PJ, Philmus B. Expanding the Natural Products Heterologous Expression Repertoire in the Model Cyanobacterium Anabaena sp. Strain PCC 7120: Production of Pendolmycin and Teleocidin B-4. ACS Synth Biol 2020; 9:63-75. [PMID: 31846576 DOI: 10.1021/acssynbio.9b00334] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Cyanobacteria are prolific producers of natural products, and genome mining has shown that many orphan biosynthetic gene clusters can be found in sequenced cyanobacterial genomes. New tools and methodologies are required to investigate these biosynthetic gene clusters, and here we present the use of Anabaena sp. strain PCC 7120 as a host for combinatorial biosynthesis of natural products using the indolactam natural products (lyngbyatoxin A, pendolmycin, and teleocidin B-4) as a test case. We were able to successfully produce all three compounds using codon optimized genes from Actinobacteria. We also introduce a new plasmid backbone based on the native Anabaena 7120 plasmid pCC7120ζ and show that production of teleocidin B-4 can be accomplished using a two-plasmid system, which can be introduced by coconjugation.
Collapse
Affiliation(s)
- Patrick Videau
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Kaitlyn N. Wells
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
- Undergraduate Honors College, Oregon State University, Corvallis, Oregon 97331, United States
| | - Arun J. Singh
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jessie Eiting
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Philip J. Proteau
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Benjamin Philmus
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| |
Collapse
|
12
|
Wells KN, Videau P, Nelson D, Eiting JE, Philmus B. The influence of sigma factors and ribosomal recognition elements on heterologous expression of cyanobacterial gene clusters in Escherichia coli. FEMS Microbiol Lett 2019; 365:5047307. [PMID: 29982530 DOI: 10.1093/femsle/fny164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/28/2018] [Indexed: 12/16/2022] Open
Abstract
Cyanobacterial natural products offer new possibilities for drugs and lead compounds but many factors can inhibit the production of sufficient yields for pharmaceutical processes. While Escherichia coli and Streptomyces sp. have been used as heterologous expression hosts to produce cyanobacterial natural products, they have not met with resounding success largely due to their inability to recognize cyanobacterial promoter regions. Recent work has shown that the filamentous freshwater cyanobacterium Anabaena sp. strain PCC 7120 recognizes various cyanobacterial promoter regions and can produce lyngbyatoxin A from the native promoter. Introduction of Anabaena sigma factors into E. coli might allow the native transcriptional machinery to recognize cyanobacterial promoters. Here, all 12 Anabaena sigma factors were expressed in E. coli and subsets were found to initiate transcription from several cyanobacterial promoters based on transcriptional fusions to the chloramphenicol acetyltransferase (CAT) reporter. Expression of individual Anabaena sigma factors in E. coli did not result in lyngbyatoxin A production from its native cyanobacterial gene cluster, possibly hindered by deficiencies in recognition of cyanobacterial ribosomal binding sites by native E. coli translational machinery. This represents an important step toward engineering E. coli into a general heterologous expression host for cyanobacterial biosynthetic gene cluster expression.
Collapse
Affiliation(s)
- Kaitlyn N Wells
- Undergraduate Honors College, 450 Learning Innovation Center, Oregon State University, Corvallis, OR 97331, USA
| | - Patrick Videau
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Bldg., Oregon State University, Corvallis, OR 97331, USA
| | - Dylan Nelson
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Bldg., Oregon State University, Corvallis, OR 97331, USA
| | - Jessie E Eiting
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Bldg., Oregon State University, Corvallis, OR 97331, USA
| | - Benjamin Philmus
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Bldg., Oregon State University, Corvallis, OR 97331, USA
| |
Collapse
|
13
|
Leinen LJ, Swenson VA, Juntunen HL, McKay SE, O'Hanlon SM, Videau P, Gaylor MO. Profiling Volatile Constituents of Homemade Preserved Foods Prepared in Early 1950s South Dakota (USA) Using Solid-Phase Microextraction (SPME) with Gas Chromatography⁻Mass Spectrometry (GC-MS) Determination. Molecules 2019; 24:molecules24040660. [PMID: 30781798 PMCID: PMC6413207 DOI: 10.3390/molecules24040660] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 02/05/2019] [Accepted: 02/08/2019] [Indexed: 11/25/2022] Open
Abstract
An essential dimension of food tasting (i.e., flavor) is olfactory stimulation by volatile organic compounds (VOCs) emitted therefrom. Here, we developed a novel analytical method based on solid-phase microextraction (SPME) sampling in argon-filled gas sampling bags with direct gas chromatography–mass spectrometry (GC-MS) determination to profile the volatile constituents of 31 homemade preserves prepared in South Dakota (USA) during the period 1950–1953. Volatile profiles varied considerably, but generally decreased in detected compounds, complexity, and intensity over three successive 2-h SPME sampling periods. Volatile profiles were generally predominated by aldehydes, alcohols, esters, ketones, and organic acids, with terpenoids constituting much of the pickled cucumber volatiles. Bisphenol-A (BPA) was also serendipitously detected and then quantified in 29 samples, at levels ranging from 3.4 to 19.2 μg/kg, within the range of levels known to induce endocrine disruption effects. Absence of BPA in two samples was attributed to their lids lacking plastic liners. As the timing of their preparation coincides with the beginning of BPA incorporation into consumer products, these jars may be some of the first BPA-containing products in the USA. To the best of our knowledge, this is the first effort to characterize BPA in and volatile profiles of rare historical foods with SPME.
Collapse
Affiliation(s)
- Lucas J Leinen
- Department of Chemistry, Dakota State University, Madison, SD 57042, USA.
| | - Vaille A Swenson
- Department of Biology, Dakota State University, Madison, SD 57042, USA.
| | - Hope L Juntunen
- Department of Chemistry, Dakota State University, Madison, SD 57042, USA.
- Department of Biology, Dakota State University, Madison, SD 57042, USA.
| | - Scott E McKay
- Department of Chemistry, Dakota State University, Madison, SD 57042, USA.
| | - Samantha M O'Hanlon
- School of Psychological Science, Oregon State University, Corvallis, OR 97331, USA.
| | - Patrick Videau
- Department of Biology, Southern Oregon University, Ashland, OR 97520, USA.
| | - Michael O Gaylor
- Department of Chemistry, Dakota State University, Madison, SD 57042, USA.
| |
Collapse
|
14
|
Affiliation(s)
- Patrick Videau
- Department of Biology, Southern Oregon University; Ashland Oregon
| | - Loralyn M. Cozy
- Department of Biology, Illinois Wesleyan University; Bloomington Illinois
| |
Collapse
|
15
|
Beurmann S, Ushijima B, Videau P, Svoboda CM, Chatterjee A, Aeby GS, Callahan SM. Dynamics of acute Montipora white syndrome: bacterial communities of healthy and diseased M. capitata colonies during and after a disease outbreak. Microbiology (Reading) 2018; 164:1240-1253. [DOI: 10.1099/mic.0.000699] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Silvia Beurmann
- †Present address: Institute for Genome Sciences, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
- 2Hawai‘i Institute of Marine Biology, Kāne‘ohe, HI, USA
- 1Department of Microbiology, Universtiy of Hawai‘i at Mānoa, Honolulu, HI, USA
| | - Blake Ushijima
- 3Oregon State University, College of Veterinary Medicine, Corvallis, OR, USA
| | - Patrick Videau
- 4Dakota State University, College of Arts and Sciences, Madison, SD, USA
| | - Christina M. Svoboda
- 1Department of Microbiology, Universtiy of Hawai‘i at Mānoa, Honolulu, HI, USA
- 2Hawai‘i Institute of Marine Biology, Kāne‘ohe, HI, USA
| | | | - Greta S. Aeby
- 2Hawai‘i Institute of Marine Biology, Kāne‘ohe, HI, USA
| | - Sean M. Callahan
- 1Department of Microbiology, Universtiy of Hawai‘i at Mānoa, Honolulu, HI, USA
- 2Hawai‘i Institute of Marine Biology, Kāne‘ohe, HI, USA
| |
Collapse
|
16
|
Juntunen HL, Leinen LJ, Pitts BK, O'Hanlon SM, Theiling BP, Barge LM, Videau P, Gaylor MO. Investigating the Kinetics of Montmorillonite Clay-Catalyzed Conversion of Anthracene to 9,10-Anthraquinone in the Context of Prebiotic Chemistry. ORIGINS LIFE EVOL B 2018; 48:321-330. [PMID: 30203410 DOI: 10.1007/s11084-018-9562-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/28/2018] [Indexed: 11/25/2022]
Abstract
Carbonaceous meteorites contributed polycyclic aromatic hydrocarbons (PAHs) to the organic inventory of the primordial Earth where they may have reacted on catalytic clay mineral surfaces to produce quinones capable of functioning as redox species in emergent biomolecular systems. To address the feasibility of this hypothesis, we assessed the kinetics of anthracene (1) conversion to 9,10-anthraquinone (2) in the presence of montmorillonite clay (MONT) over the temperature range 25 to 250 °C. Apparent rates of conversion were concentration independent and displayed a sigmoidal relationship with temperature, and conversion efficiencies ranged from 0.027 to 0.066%. Conversion was not detectable in the absence of MONT or a sufficiently high oxidation potential (in this case, molecular oxygen (O2)). These results suggest a scenario in which meteoritic 1 and MONT interactions could yield biologically important quinones in prebiotic planetary environments.
Collapse
Affiliation(s)
- Hope L Juntunen
- Department of Biology, Dakota State University, Madison, SD, 57042, USA
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | - Lucas J Leinen
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA
| | - Briann K Pitts
- Department of Biology, Dakota State University, Madison, SD, 57042, USA
| | - Samantha M O'Hanlon
- School of Psychological Science, Oregon State University, Corvallis, OR, 97331, USA
| | | | - Laura M Barge
- NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 91109, USA
| | - Patrick Videau
- Department of Biology, Dakota State University, Madison, SD, 57042, USA.
- Department of Biology, Southern Oregon University, Ashland, OR, 97520, USA.
| | - Michael O Gaylor
- Department of Chemistry, Dakota State University, Madison, SD, 57042, USA.
| |
Collapse
|
17
|
Rivers OS, Beurmann S, Dow A, Cozy LM, Videau P. Phenotypic Assessment Suggests Multiple Start Codons for HetN, an Inhibitor of Heterocyst Differentiation, in Anabaena sp. Strain PCC 7120. J Bacteriol 2018; 200:e00220-18. [PMID: 29784882 PMCID: PMC6060353 DOI: 10.1128/jb.00220-18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 05/14/2018] [Indexed: 11/20/2022] Open
Abstract
Multicellular organisms must carefully regulate the timing, number, and location of specialized cellular development. In the filamentous cyanobacterium Anabaena sp. strain PCC 7120, nitrogen-fixing heterocysts are interspersed between vegetative cells in a periodic pattern to achieve an optimal exchange of bioavailable nitrogen and reduced carbon. The spacing between heterocysts is regulated by the activity of two developmental inhibitors, PatS and HetN. PatS functions to create a de novo pattern from a homogenous field of undifferentiated cells, while HetN maintains the pattern throughout subsequent growth. Both PatS and HetN harbor the peptide motif ERGSGR, which is sufficient to inhibit development. While the small size of PatS makes the interpretation of inhibitory domains relatively simple, HetN is a 287-amino-acid protein with multiple functional regions. Previous work suggested the possibility of a truncated form of HetN containing the ERGSGR motif as the source of the HetN-derived inhibitory signal. In this work, we present evidence that the glutamate of the ERGSGR motif is required for proper HetN inhibition of heterocysts. Mutational analysis and subcellular localization indicate that the gene encoding HetN uses two methionine start codons (M1 and M119) to encode two protein forms: M1 is required for protein localization, while M119 is primarily responsible for inhibitory function. Finally, we demonstrate that patS and hetN are not functionally equivalent when expressed from the other gene's regulatory sequences. Taken together, these results help clarify the functional forms of HetN and will help refine future work defining a HetN-derived inhibitory signal in this model of one-dimensional periodic patterning.IMPORTANCE The proper placement of different cell types during a developmental program requires the creation and maintenance of a biological pattern to define the cells that will differentiate. Here we show that the HetN inhibitor, responsible for pattern maintenance of specialized nitrogen-fixing heterocyst cells in the filamentous cyanobacterium Anabaena, may be produced from two different start methionine codons. This work demonstrates that the two start sites are individually involved in a different HetN function, either membrane localization or inhibition of cellular differentiation.
Collapse
Affiliation(s)
- Orion S Rivers
- University of Hawaii at Manoa, Department of Microbiology, Honolulu, Hawaii, USA
| | - Silvia Beurmann
- University of Maryland, Institute for Genome Sciences, Maryland School of Medicine, Baltimore, Maryland, USA
| | - Allexa Dow
- University of Hawaii at Manoa, Department of Microbiology, Honolulu, Hawaii, USA
| | - Loralyn M Cozy
- Illinois Wesleyan University, Department of Biology, Bloomington, Illinois, USA
| | - Patrick Videau
- Dakota State University, Biology Department, College of Arts and Sciences, Madison, South Dakota
| |
Collapse
|
18
|
Gallegos DA, Saurí J, Cohen RD, Wan X, Videau P, Vallota-Eastman AO, Shaala LA, Youssef DTA, Williamson RT, Martin GE, Philmus B, Sikora AE, Ishmael JE, McPhail KL. Jizanpeptins, Cyanobacterial Protease Inhibitors from a Symploca sp. Cyanobacterium Collected in the Red Sea. J Nat Prod 2018; 81:1417-1425. [PMID: 29808677 PMCID: PMC7847313 DOI: 10.1021/acs.jnatprod.8b00117] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Jizanpeptins A-E (1-5) are micropeptin depsipeptides isolated from a Red Sea specimen of a Symploca sp. cyanobacterium. The planar structures of the jizanpeptins were established using NMR spectroscopy and mass spectrometry and contain 3-amino-6-hydroxy-2-piperidone (Ahp) as one of eight residues in a typical micropeptin motif, as well as a side chain terminal glyceric acid sulfate moiety. The absolute configurations of the jizanpeptins were assigned using a combination of Marfey's methodology and chiral-phase HPLC analysis of hydrolysis products compared to commercial and synthesized standards. Jizanpeptins A-E showed specific inhibition of the serine protease trypsin (IC50 = 72 nM to 1 μM) compared to chymotrypsin (IC50 = 1.4 to >10 μM) in vitro and were not overtly cytotoxic to HeLa cervical or NCI-H460 lung cancer cell lines at micromolar concentrations.
Collapse
Affiliation(s)
- David A. Gallegos
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Josep Saurí
- Structure Elucidation Group, Process and Analytical Research and Development, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, Massachusetts 02115, United States
| | - Ryan D. Cohen
- Structure Elucidation Group, Process and Analytical Research and Development, Merck & Co., Inc.,126 East Lincoln Avenue, Rahway, New Jersey 07065, United States
| | - Xuemei Wan
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Patrick Videau
- Department of Biology, College of Arts and Sciences, Dakota State University, Madison, SD 57042
| | - Alec O. Vallota-Eastman
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Lamiaa A. Shaala
- Suez Canal University Hospital, Suez Canal University, Ismailia 41522, Egypt
| | - Diaa T. A. Youssef
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - R. Thomas Williamson
- Structure Elucidation Group, Process and Analytical Research and Development, Merck & Co., Inc.,126 East Lincoln Avenue, Rahway, New Jersey 07065, United States
| | - Gary E. Martin
- Structure Elucidation Group, Process and Analytical Research and Development, Merck & Co., Inc.,126 East Lincoln Avenue, Rahway, New Jersey 07065, United States
| | - Benjamin Philmus
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Aleksandra E. Sikora
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jane E. Ishmael
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Kerry L. McPhail
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| |
Collapse
|
19
|
Videau P, Rivers OS, Tom SK, Oshiro RT, Ushijima B, Swenson VA, Philmus B, Gaylor MO, Cozy LM. The hetZ gene indirectly regulates heterocyst development at the level of pattern formation in Anabaena sp. strain PCC 7120. Mol Microbiol 2018; 109:91-104. [PMID: 29676808 DOI: 10.1111/mmi.13974] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2018] [Indexed: 01/08/2023]
Abstract
Multicellular development requires the careful orchestration of gene expression to correctly create and position specialized cells. In the filamentous cyanobacterium Anabaena sp. strain PCC 7120, nitrogen-fixing heterocysts are differentiated from vegetative cells in a reproducibly periodic and physiologically relevant pattern. While many genetic factors required for heterocyst development have been identified, the role of HetZ has remained unclear. Here, we present evidence to clarify the requirement of hetZ for heterocyst production and support a model where HetZ functions in the patterning stage of differentiation. We show that a clean, nonpolar deletion of hetZ fails to express the developmental genes hetR, patS, hetP and hetZ correctly and fails to produce heterocysts. Complementation and overexpression of hetZ in a hetP mutant revealed that hetZ was incapable of bypassing hetP, suggesting that it acts upstream of hetP. Complementation and overexpression of hetZ in a hetR mutant, however, demonstrated bypass of hetR, suggesting that it acts downstream of hetR and is capable of bypassing the need for hetR for differentiation irrespective of nitrogen status. Finally, protein-protein interactions were observed between HetZ and HetR, Alr2902 and HetZ itself. Collectively, this work suggests a regulatory role for HetZ in the patterning phase of cellular differentiation in Anabaena.
Collapse
Affiliation(s)
- Patrick Videau
- Department of Biology, College of Arts and Sciences, Dakota State University, Madison, SD, USA
| | - Orion S Rivers
- Department of Microbiology, University of Hawaii, Honolulu, HI, USA
| | - Sasa K Tom
- Department of Microbiology, University of Hawaii, Honolulu, HI, USA
| | - Reid T Oshiro
- Department of Biology, Indiana University, Bloomington, IN, USA
| | - Blake Ushijima
- Department of Microbiology, University of Hawaii, Honolulu, HI, USA
| | - Vaille A Swenson
- Department of Biology, College of Arts and Sciences, Dakota State University, Madison, SD, USA
- Department of Chemistry, College of Arts and Sciences, Dakota State University, Madison, SD, USA
| | - Benjamin Philmus
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, OR, USA
| | - Michael O Gaylor
- Department of Chemistry, College of Arts and Sciences, Dakota State University, Madison, SD, USA
| | - Loralyn M Cozy
- Department of Biology, Illinois Wesleyan University, Bloomington, IL, USA
| |
Collapse
|
20
|
Gaylor MO, Juntunen HL, Hazelwood D, Videau P. Assessment of Multiple Solvents for Extraction and Direct GC-MS Determination of the Phytochemical Inventory of Sansevieria Extrafoliar Nectar Droplets. J Chromatogr Sci 2018; 56:293-299. [PMID: 29425265 DOI: 10.1093/chromsci/bmy008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 01/12/2018] [Indexed: 11/13/2022]
Abstract
Considerable effort has been devoted to analytical determinations of sugar and amino acid constituents of plant nectars, with the primary aim of understanding their ecological roles, yet few studies have reported more exhaustive organic compound inventories of plant nectars or extrafoliar nectars. This work evaluated the efficacy of four solvents (ethyl acetate, dichloromethane, toluene and hexane) to extract the greatest number of organic compound classes and unique compounds from extrafoliar nectar drops produced by Sansevieria spp. Aggregation of the results from each solvent revealed that 240 unique compounds were extracted in total, with 42.5% of those detected in multiple extracts. Aliphatic hydrocarbons dominated in all but the ethyl acetate extracts, with 44 unique aliphatic hydrocarbons detected in dichloromethane (DCM) extracts, followed by 41, 19 and 8 in hexane, toluene and ethyl acetate extracts, respectively. Hexane extracted the most unique compounds (79), followed by DCM (73), ethyl acetate (56) and toluene (32). Integrated total ion chromatographic peak areas of extracted compound classes were positively correlated with numbers of unique compounds detected within those classes. In addition to demonstrating that multi-solvent extraction with direct GC-MS detection is a suitable analytical approach for determining secondary nectar constituents, to the best of our knowledge, this study also represents: (i) the first attempt to inventory the secondary phytochemical constituents of Sansevieria spp. extrafoliar nectar secretions and (ii) the largest organic solvent extractable compound inventory reported for any plant matrix to date.
Collapse
Affiliation(s)
- Michael O Gaylor
- Department of Chemistry, College of Arts and Sciences, Dakota State University, Madison, SD 57042, USA
| | - Hope L Juntunen
- Department of Chemistry, College of Arts and Sciences, Dakota State University, Madison, SD 57042, USA.,Department of Biology, College of Arts and Sciences, Dakota State University, Madison, SD 57042, USA
| | - Donna Hazelwood
- Department of Biology, College of Arts and Sciences, Dakota State University, Madison, SD 57042, USA
| | - Patrick Videau
- Department of Biology, College of Arts and Sciences, Dakota State University, Madison, SD 57042, USA
| |
Collapse
|
21
|
Beurmann S, Ushijima B, Videau P, Svoboda CM, Smith AM, Rivers OS, Aeby GS, Callahan SM. Pseudoalteromonas piratica strain OCN003 is a coral pathogen that causes a switch from chronic to acute Montipora white syndrome in Montipora capitata. PLoS One 2017; 12:e0188319. [PMID: 29145488 PMCID: PMC5690655 DOI: 10.1371/journal.pone.0188319] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/03/2017] [Indexed: 12/31/2022] Open
Abstract
Reports of mass coral mortality from disease have increased over the last two decades. Montipora white syndrome (MWS) is a tissue loss disease that has negatively impacted populations of the coral Montipora capitata in Kāne'ohe Bay, Hawai'i. Two types of MWS have been documented; a progressive disease termed chronic MWS (cMWS), that can be caused by Vibrio owensii strain OCN002, and a comparatively faster disease termed acute MWS (aMWS), that can be caused by Vibrio coralliilyticus strain OCN008. M. capitata colonies exhibiting cMWS can spontaneously switch to aMWS in the field. In this study, a novel Pseudoalteromonas species, P. piratica strain OCN003, fulfilled Koch's postulates of disease causation as another etiological agent of aMWS. Additionally, OCN003 induced a switch from cMWS to aMWS on M. capitata in laboratory infection trials. A comparison of OCN003 and Vibrio coralliilyticus strain OCN008, showed that OCN003 was more effective at inducing the cMWS to aMWS switch in M. capitata than OCN008. This study is the first to demonstrate that similar disease signs on one coral species (aMWS on M. capitata) can be caused by multiple pathogens, and describes the first Pseudoalteromonas species that infects coral.
Collapse
Affiliation(s)
- Silvia Beurmann
- Universtiy of Hawaiʻi at Mānoa, Department of Microbiology, Honolulu, HI, United States of America
- Hawaiʻi Institute of Marine Biology, Kāneʻohe, HI, United States of America
| | - Blake Ushijima
- Oregon State University, College of Veterinary Medicine, Corvallis, OR, United States of America
| | - Patrick Videau
- Dakota State University, College of Arts and Sciences, Madison, SD, United States of America
| | - Christina Marie Svoboda
- Universtiy of Hawaiʻi at Mānoa, Department of Microbiology, Honolulu, HI, United States of America
- Hawaiʻi Institute of Marine Biology, Kāneʻohe, HI, United States of America
| | - Ashley Marie Smith
- Universtiy of Hawaiʻi at Mānoa, Department of Microbiology, Honolulu, HI, United States of America
- Hawaiʻi Institute of Marine Biology, Kāneʻohe, HI, United States of America
| | - Orion Silverstar Rivers
- Universtiy of Hawaiʻi at Mānoa, Department of Microbiology, Honolulu, HI, United States of America
| | - Greta Smith Aeby
- Hawaiʻi Institute of Marine Biology, Kāneʻohe, HI, United States of America
| | - Sean Michael Callahan
- Universtiy of Hawaiʻi at Mānoa, Department of Microbiology, Honolulu, HI, United States of America
- Hawaiʻi Institute of Marine Biology, Kāneʻohe, HI, United States of America
| |
Collapse
|
22
|
Beurmann S, Ushijima B, Svoboda CM, Videau P, Smith AM, Donachie SP, Aeby GS, Callahan SM. Pseudoalteromonas piratica sp. nov., a budding, prosthecate bacterium from diseased Montipora capitata, and emended description of the genus Pseudoalteromonas. Int J Syst Evol Microbiol 2017; 67:2683-2688. [PMID: 28792373 DOI: 10.1099/ijsem.0.001995] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, motile, rod-shaped bacterium designated OCN003T was cultivated from mucus taken from a diseased colony of the coral Montipora capitata in Kāne'ohe Bay, O'ahu, Hawai'i. Colonies of OCN003T were pale yellow, 1-3 mm in diameter, convex, smooth and entire. The strain was heterotrophic, strictly aerobic and strictly halophilic. Cells of OCN003T produced buds on peritrichous prosthecae. Growth occurred within the pH range of 5.5 to 10, and the temperature range of 14 to 39 °C. Major fatty acids were 16 : 1ω7c, 16 : 0, 18 : 1ω7c, 17 : 1ω8c, 12 : 0 3-OH and 17 : 0. Phylogenetic analysis of 1399 nucleotides of the 16S rRNA gene nucleotide sequence and a multi-locus sequence analysis of three genes placed OCN003T in the genus Pseudoalteromonas and indicated that the nearest relatives described are Pseudoalteromonas spongiae, P. luteoviolacea, P. ruthenica and P. phenolica(97-99 % sequence identity). The DNA G+C content of the strain's genome was 40.0 mol%. Based on in silico DNA-DNA hybridization and phenotypic differences from related type strains, we propose that OCN003T represents the type strain of a novel species in the genus Pseudoalteromonas, proposed as Pseudoalteromonas piratica sp. nov. OCN003T (=CCOS1042T=CIP 111189T). An emended description of the genus Pseudoalteromonas is presented.
Collapse
Affiliation(s)
- Silvia Beurmann
- Present address: Institute for GenomeSciences, School of Medicine, University of Maryland, Baltimore, MD 21201, USA.,Hawai'i Institute of Marine Biology, 46-007 Lilipuna Road, Kāne'ohe, HI 96744, USA.,Department of Microbiology, University of Hawai'i at Mānoa, 2538 McCarthy Mall, Snyder Hall, Honolulu, HI 96822, USA
| | - Blake Ushijima
- College of Veterinary Medicine, Oregon State University, 105 Magruder Hall, 700 SW 30th Street, Corvallis, OR 97331, USA
| | - Christina M Svoboda
- Hawai'i Institute of Marine Biology, 46-007 Lilipuna Road, Kāne'ohe, HI 96744, USA
| | - Patrick Videau
- Biology Department, Dakota State University, College of Arts and Sciences, Science Center, 820 N Washington Ave, Madison, SD 57042, USA
| | - Ashley M Smith
- Department of Microbiology, University of Hawai'i at Mānoa, 2538 McCarthy Mall, Snyder Hall, Honolulu, HI 96822, USA.,Hawai'i Institute of Marine Biology, 46-007 Lilipuna Road, Kāne'ohe, HI 96744, USA
| | - Stuart P Donachie
- Department of Microbiology, University of Hawai'i at Mānoa, 2538 McCarthy Mall, Snyder Hall, Honolulu, HI 96822, USA
| | - Greta S Aeby
- Hawai'i Institute of Marine Biology, 46-007 Lilipuna Road, Kāne'ohe, HI 96744, USA
| | - Sean M Callahan
- Department of Microbiology, University of Hawai'i at Mānoa, 2538 McCarthy Mall, Snyder Hall, Honolulu, HI 96822, USA.,Hawai'i Institute of Marine Biology, 46-007 Lilipuna Road, Kāne'ohe, HI 96744, USA
| |
Collapse
|
23
|
Beurmann S, Runyon CM, Videau P, Callahan SM, Aeby GS. Assessment of disease lesion removal as a method to control chronic Montipora white syndrome. Dis Aquat Organ 2017; 123:173-179. [PMID: 28262637 DOI: 10.3354/dao03088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Coral colonies in Kāne'ohe Bay, Hawai'i (USA), are afflicted with the tissue loss disease chronic Montipora white syndrome (cMWS). Here we show that removal of chronic disease lesions is a potential method to slow the progression of cMWS in M. capitata. Over the 24 wk observation period, treatment colonies lost almost half the amount of tissue that was lost by control colonies. The percentage of tissue loss at each sampling interval (mean ± SEM; treatment: 1.17 ± 0.47%, control: 2.25 ± 0.63%) and the rate of tissue loss per day (treatment: 0.13 ± 0.04%, control: 0.27 ± 0.08%) were both significantly lower on treated colonies than control colonies. While lesion removal stopped tissue loss at the initial infection site, which allowed colony healing, it did not prevent re-infection; in all but one of the treated colonies, new cMWS lesions appeared in other areas of the colony but not around the treatment margins. Additionally, the rate of new infections was similar between treatment and control colonies, indicating that physical injury from lesion removal did not appear to increase cMWS susceptibility. These results indicate that lesion removal reduced morbidity in M. capitata exhibiting cMWS but did not stop the disease.
Collapse
Affiliation(s)
- Silvia Beurmann
- University of Hawai'i at Manoa, Department of Microbiology, Honolulu, HI 96822, USA
| | | | | | | | | |
Collapse
|
24
|
Videau P, Wells KN, Singh AJ, Gerwick WH, Philmus B. Assessment of Anabaena sp. Strain PCC 7120 as a Heterologous Expression Host for Cyanobacterial Natural Products: Production of Lyngbyatoxin A. ACS Synth Biol 2016; 5:978-88. [PMID: 27176641 DOI: 10.1021/acssynbio.6b00038] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyanobacteria are well-known producers of natural products of highly varied structure and biological properties. However, the long doubling times, difficulty in establishing genetic methods for marine cyanobacteria, and low compound titers have hindered research into the biosynthesis of their secondary metabolites. While a few attempts to heterologously express cyanobacterial natural products have occurred, the results have been of varied success. Here, we report the first steps in developing the model freshwater cyanobacterium Anabaena sp. strain PCC 7120 (Anabaena 7120) as a general heterologous expression host for cyanobacterial secondary metabolites. We show that Anabaena 7120 can heterologously synthesize lyngbyatoxin A in yields comparable to those of the native producer, Moorea producens, and detail the design and use of replicative plasmids for compound production. We also demonstrate that Anabaena 7120 recognizes promoters from various biosynthetic gene clusters from both free-living and obligate symbiotic marine cyanobacteria. Through simple genetic manipulations, the titer of lyngbyatoxin A can be improved up to 13-fold. The development of Anabaena 7120 as a general heterologous expression host enables investigation of interesting cyanobacterial biosynthetic reactions and genetic engineering of their biosynthetic pathways.
Collapse
Affiliation(s)
| | | | | | - William H. Gerwick
- Center
for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography
and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, United States
| | | |
Collapse
|
25
|
Naurin S, Bennett J, Videau P, Philmus B, Soule T. The response regulator Npun_F1278 is essential for scytonemin biosynthesis in the cyanobacterium Nostoc punctiforme ATCC 29133. J Phycol 2016; 52:564-571. [PMID: 27020740 DOI: 10.1111/jpy.12414] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 02/15/2016] [Indexed: 06/05/2023]
Abstract
Following exposure to long-wavelength ultraviolet radiation (UVA), some cyanobacteria produce the indole-alkaloid sunscreen scytonemin. The genomic region associated with scytonemin biosynthesis in the cyanobacterium Nostoc punctiforme includes 18 cotranscribed genes. A two-component regulatory system (Npun_F1277/Npun_F1278) directly upstream from the biosynthetic genes was identified through comparative genomics and is likely involved in scytonemin regulation. In this study, the response regulator (RR), Npun_F1278, was evaluated for its ability to regulate scytonemin biosynthesis using a mutant strain of N. punctiforme deficient in this gene, hereafter strain Δ1278. Following UVA radiation, the typical stimulus to initiate scytonemin biosynthesis, Δ1278 was incapable of producing scytonemin. A phenotypic characterization of Δ1278 suggests that aside from the ability to produce scytonemin, the deletion of the Npun_F1278 gene does not affect the cellular morphology, cellular differentiation capability, or lipid-soluble pigment complement of Δ1278 compared to the wildtype. The mutant, however, had a slower specific growth rate under white light and produced ~2.5-fold more phycocyanin per cell under UVA than the wildtype. Since Δ1278 does not produce scytonemin, this study demonstrates that the RR gene, Npun_F1278, is essential for scytonemin biosynthesis in N. punctiforme. While most of the evaluated effects of this gene appear to be specific for scytonemin, this regulator may also influence the overall health of the cell and phycobiliprotein synthesis, directly or indirectly. This is the first study to identify a regulatory gene involved in the biosynthesis of the sunscreen scytonemin and posits a link between cell growth, pigment synthesis, and sunscreen production.
Collapse
Affiliation(s)
- Sejuti Naurin
- Department of Biology, Indiana University-Purdue University Fort Wayne, Fort Wayne, Indiana, 46805, USA
| | - Janine Bennett
- Department of Biology, Indiana University-Purdue University Fort Wayne, Fort Wayne, Indiana, 46805, USA
| | - Patrick Videau
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, 97331, USA
| | - Benjamin Philmus
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, 97331, USA
| | - Tanya Soule
- Department of Biology, Indiana University-Purdue University Fort Wayne, Fort Wayne, Indiana, 46805, USA
| |
Collapse
|
26
|
Ushijima B, Videau P, Poscablo D, Stengel JW, Beurmann S, Burger AH, Aeby GS, Callahan SM. Mutation of the toxR or mshA genes from Vibrio coralliilyticus strain OCN014 reduces infection of the coral Acropora cytherea. Environ Microbiol 2016; 18:4055-4067. [PMID: 27348808 DOI: 10.1111/1462-2920.13428] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/19/2016] [Indexed: 01/09/2023]
Abstract
Thermal stress increases the incidence of coral disease, which is predicted to become more common with climate change, even on pristine reefs such as those surrounding Palmyra Atoll in the Northern Line Islands that experience minimal anthropogenic stress. Here we describe a strain of Vibrio coralliilyticus, OCN014, which was isolated from Acropora cytherea during an outbreak of Acropora white syndrome (AWS), a tissue loss disease that infected 25% of the A. cytherea population at Palmyra Atoll in 2009. OCN014 recreated signs of disease in experimentally infected corals in a temperature-dependent manner. Genes in OCN014 with expression levels positively correlated with temperature were identified using a transposon-mediated genetic screen. Mutant strains harbouring transposon insertions in two such genes, toxR (a toxin regulator) and mshA (the 11th gene of the 16-gene mannose-sensitive hemagglutinin (MSHA) type IV pilus operon), had reduced infectivity of A. cytherea. Deletion of toxR and the MSHA operon in a second strain of V. coralliilyticus, OCN008, that induces acute Montipora white syndrome in a temperature-independent manner had similarly reduced virulence. This work provides a link between temperature-dependent expression of virulence factors in a pathogen and infection of its coral host.
Collapse
Affiliation(s)
- Blake Ushijima
- Department of Microbiology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA.,Hawai'i Institute of Marine Biology, Kāne'ohe, HI, 96744, USA
| | - Patrick Videau
- Department of Microbiology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA.,Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR, 97331, USA
| | - Donna Poscablo
- Department of Microbiology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA.,Department of Biology, San Francisco State University, San Francisco, CA, 94132, USA
| | - John W Stengel
- Department of Microbiology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Silvia Beurmann
- Department of Microbiology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA.,Hawai'i Institute of Marine Biology, Kāne'ohe, HI, 96744, USA
| | - Andrew H Burger
- Department of Microbiology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA.,Hawai'i Institute of Marine Biology, Kāne'ohe, HI, 96744, USA
| | - Greta S Aeby
- Hawai'i Institute of Marine Biology, Kāne'ohe, HI, 96744, USA
| | - Sean M Callahan
- Department of Microbiology, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| |
Collapse
|
27
|
Vining O, Medina RA, Mitchell EA, Videau P, Li D, Serrill JD, Kelly JX, Gerwick WH, Proteau PJ, Ishmael JE, McPhail KL. Depsipeptide companeramides from a Panamanian marine cyanobacterium associated with the coibamide producer. J Nat Prod 2015; 78:413-20. [PMID: 25562664 PMCID: PMC4380200 DOI: 10.1021/np5007907] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Two new cyclic depsipeptides, companeramides A (1) and B (2), have been isolated from the phylogenetically characterized cyanobacterial collection that yielded the previously reported cancer cell toxin coibamide A (collected from Coiba Island, Panama). The planar structures of the companeramides, which contain 3-amino-2-methyl-7-octynoic acid (Amoya), hydroxy isovaleric acid (Hiva), and eight α-amino acid units, were established by NMR spectroscopy and mass spectrometry. The absolute configuration of each companeramide was assigned using a combination of Marfey's methodology and chiral-phase HPLC analysis of complete and partial hydrolysis products compared to commercial and synthesized standards. Companeramides A (1) and B (2) showed high nanomolar in vitro antiplasmodial activity but were not overtly cytotoxic to four human cancer cell lines at the doses tested.
Collapse
Affiliation(s)
- Oliver
B. Vining
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Rebecca A. Medina
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Edward A. Mitchell
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Patrick Videau
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Dong Li
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jeffrey D. Serrill
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jane X. Kelly
- Veterans
Affairs Medical Center, Portland, Oregon 97239, United States
| | - William H. Gerwick
- Center
for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography
and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, United States
| | - Philip J. Proteau
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jane E. Ishmael
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
| | - Kerry L. McPhail
- Department
of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
- Tel: +1 541 737 5808. Fax: +1 541 737 3999. E-mail:
| |
Collapse
|
28
|
Aeby GS, Work TM, Runyon CM, Shore-Maggio A, Ushijima B, Videau P, Beurmann S, Callahan SM. First record of black band disease in the Hawaiian archipelago: response, outbreak status, virulence, and a method of treatment. PLoS One 2015; 10:e0120853. [PMID: 25774800 PMCID: PMC4361573 DOI: 10.1371/journal.pone.0120853] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/27/2015] [Indexed: 11/19/2022] Open
Abstract
A high number of coral colonies, Montipora spp., with progressive tissue loss were reported from the north shore of Kaua'i by a member of the Eyes of the Reef volunteer reporting network. The disease has a distinct lesion (semi-circular pattern of tissue loss with an adjacent dark band) that was first observed in Hanalei Bay, Kaua'i in 2004. The disease, initially termed Montipora banded tissue loss, appeared grossly similar to black band disease (BBD), which affects corals worldwide. Following the initial report, a rapid response was initiated as outlined in Hawai'i's rapid response contingency plan to determine outbreak status and investigate the disease. Our study identified the three dominant bacterial constituents indicative of BBD (filamentous cyanobacteria, sulfate-reducing bacteria, sulfide-oxidizing bacteria) in coral disease lesions from Kaua'i, which provided the first evidence of BBD in the Hawaiian archipelago. A rapid survey at the alleged outbreak site found disease to affect 6-7% of the montiporids, which is higher than a prior prevalence of less than 1% measured on Kaua'i in 2004, indicative of an epizootic. Tagged colonies with BBD had an average rate of tissue loss of 5.7 cm2/day over a two-month period. Treatment of diseased colonies with a double band of marine epoxy, mixed with chlorine powder, effectively reduced colony mortality. Within two months, treated colonies lost an average of 30% less tissue compared to untreated controls.
Collapse
Affiliation(s)
- Greta S. Aeby
- Hawai‘i Institute of Marine Biology, Kāne‘ohe, Hawaii, United States of America
- Marine Biology Graduate Program, University of Hawai‘i, Honolulu, Hawaii, United States of America
- * E-mail:
| | - Thierry M. Work
- U.S. Geological Survey, National Wildlife Health Center, Honolulu Field Station, Honolulu, Hawaii, United States of America
| | - Christina M. Runyon
- Hawai‘i Institute of Marine Biology, Kāne‘ohe, Hawaii, United States of America
- Marine Biology Graduate Program, University of Hawai‘i, Honolulu, Hawaii, United States of America
| | - Amanda Shore-Maggio
- Hawai‘i Institute of Marine Biology, Kāne‘ohe, Hawaii, United States of America
- Microbiology Department, University of Hawai‘i, Honolulu, Hawaii, United States of America
| | - Blake Ushijima
- Hawai‘i Institute of Marine Biology, Kāne‘ohe, Hawaii, United States of America
- Microbiology Department, University of Hawai‘i, Honolulu, Hawaii, United States of America
| | - Patrick Videau
- Microbiology Department, University of Hawai‘i, Honolulu, Hawaii, United States of America
| | - Silvia Beurmann
- Hawai‘i Institute of Marine Biology, Kāne‘ohe, Hawaii, United States of America
- Microbiology Department, University of Hawai‘i, Honolulu, Hawaii, United States of America
| | - Sean M. Callahan
- Hawai‘i Institute of Marine Biology, Kāne‘ohe, Hawaii, United States of America
- Marine Biology Graduate Program, University of Hawai‘i, Honolulu, Hawaii, United States of America
- Microbiology Department, University of Hawai‘i, Honolulu, Hawaii, United States of America
| |
Collapse
|
29
|
Rivers OS, Videau P, Callahan SM. Mutation of
sepJ
reduces the intercellular signal range of a
hetN
‐dependent paracrine signal, but not of a
patS
‐dependent signal, in the filamentous cyanobacterium
A
nabaena
sp. strain
PCC
7120. Mol Microbiol 2014; 94:1260-71. [DOI: 10.1111/mmi.12836] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/20/2014] [Indexed: 02/06/2023]
Affiliation(s)
- Orion S. Rivers
- Department of MicrobiologyUniversity of Hawai'i at Mānoa Honolulu HI 96822 USA
| | - Patrick Videau
- Department of MicrobiologyUniversity of Hawai'i at Mānoa Honolulu HI 96822 USA
| | - Sean M. Callahan
- Department of MicrobiologyUniversity of Hawai'i at Mānoa Honolulu HI 96822 USA
| |
Collapse
|
30
|
Videau P, Oshiro RT, Cozy LM, Callahan SM. Transcriptional dynamics of developmental genes assessed with an FMN-dependent fluorophore in mature heterocysts of Anabaena sp. strain PCC 7120. Microbiology (Reading) 2014; 160:1874-1881. [PMID: 25061040 DOI: 10.1099/mic.0.078352-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Anabaena sp. strain PCC 7120 is a filamentous cyanobacterium that differentiates nitrogen-fixing heterocysts when available combined nitrogen is limiting. Growth under diazotrophic conditions results in a mixture of 'new' (recently differentiated) and 'old' (mature) heterocysts. The microoxic environment present in heterocysts makes the interpretation of gene expression using oxygen-dependent fluorophores, including GFP, difficult. The work presented here evaluates the transcriptional dynamics of three developmental genes in mature heterocysts utilizing EcFbFP, a flavin mononucleotide-dependent fluorophore, as the reporter. Expression of both GFP and EcFbFP from the heterologous petE promoter showed that, although GFP and EcFbFP fluoresced in both vegetative cells and new heterocysts, only EcFbFP fluoresced in old heterocysts. A transcriptional fusion of EcFbFP to the late-stage heterocyst-specific nifB promoter displayed continued expression beyond the cessation of GFP fluorescence in heterocysts. Promoter fusions of the master regulator of differentiation, hetR, and its inhibitors, patS and hetN, to GFP and EcFbFP were visualized to determine their role(s) in heterocyst function after morphogenesis. The expression of hetR and hetN was found to persist beyond the completion of development in most heterocysts, whereas patS expression ceased. These data are consistent with a model of heterocyst patterning in which patS is involved in de novo pattern formation, hetN is required for pattern maintenance, and hetR is needed for all stages of development.
Collapse
Affiliation(s)
- Patrick Videau
- Department of Microbiology, University of Hawaii, Honolulu, HI 96822, USA
| | - Reid T Oshiro
- Department of Microbiology, University of Hawaii, Honolulu, HI 96822, USA
| | - Loralyn M Cozy
- Department of Microbiology, University of Hawaii, Honolulu, HI 96822, USA
| | - Sean M Callahan
- Department of Microbiology, University of Hawaii, Honolulu, HI 96822, USA
| |
Collapse
|
31
|
Williams GJ, Price NN, Ushijima B, Aeby GS, Callahan S, Davy SK, Gove JM, Johnson MD, Knapp IS, Shore-Maggio A, Smith JE, Videau P, Work TM. Ocean warming and acidification have complex interactive effects on the dynamics of a marine fungal disease. Proc Biol Sci 2014; 281:20133069. [PMID: 24452029 DOI: 10.1098/rspb.2013.3069] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Diseases threaten the structure and function of marine ecosystems and are contributing to the global decline of coral reefs. We currently lack an understanding of how climate change stressors, such as ocean acidification (OA) and warming, may simultaneously affect coral reef disease dynamics, particularly diseases threatening key reef-building organisms, for example crustose coralline algae (CCA). Here, we use coralline fungal disease (CFD), a previously described CCA disease from the Pacific, to examine these simultaneous effects using both field observations and experimental manipulations. We identify the associated fungus as belonging to the subphylum Ustilaginomycetes and show linear lesion expansion rates on individual hosts can reach 6.5 mm per day. Further, we demonstrate for the first time, to our knowledge, that ocean-warming events could increase the frequency of CFD outbreaks on coral reefs, but that OA-induced lowering of pH may ameliorate outbreaks by slowing lesion expansion rates on individual hosts. Lowered pH may still reduce overall host survivorship, however, by reducing calcification and facilitating fungal bio-erosion. Such complex, interactive effects between simultaneous extrinsic environmental stressors on disease dynamics are important to consider if we are to accurately predict the response of coral reef communities to future climate change.
Collapse
Affiliation(s)
- Gareth J Williams
- Scripps Institution of Oceanography, Center for Marine Biodiversity and Conservation, University of California San Diego, , La Jolla, CA 92093, USA, Department of Microbiology, University of California San Diego, , La Jolla, CA 92093, USA, Joint Institute for Marine and Atmospheric Research, University of Hawaii at Manoa, , Honolulu, HI, USA, Hawaii Institute of Marine Biology, , Kaneohe, HI 96744, USA, School of Biological Sciences, Victoria University of Wellington, , PO Box 600, Wellington, New Zealand, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), , NOAA, 1610 Kapiolani Boulevard, Suite 1110, Honolulu, HI 96814, USA, US Geological Survey, National Wildlife Health Center, , Honolulu Field Station, PO Box 50167, Honolulu, HI 96850, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Higa KC, Rajagopalan R, Risser DD, Rivers OS, Tom SK, Videau P, Callahan SM. The RGSGR amino acid motif of the intercellular signalling protein, HetN, is required for patterning of heterocysts in Anabaena sp. strain PCC 7120. Mol Microbiol 2012; 83:682-93. [DOI: 10.1111/j.1365-2958.2011.07949.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
33
|
Isaacs LT, Kan J, Nguyen L, Videau P, Anderson MA, Wright TL, Hill RT. Comparison of the bacterial communities of wild and captive sponge Clathria prolifera from the Chesapeake Bay. Mar Biotechnol (NY) 2009; 11:758-770. [PMID: 19444519 DOI: 10.1007/s10126-009-9192-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2008] [Accepted: 04/25/2009] [Indexed: 05/27/2023]
Abstract
The red-beard sponge Clathria prolifera, which is widely distributed in the USA, has been widely used as a model system in cell biology and has been proposed as a suitable teaching tool on biology and environmental sciences. We undertook the first detailed microbiological study of this sponge on samples collected from the Chesapeake Bay. A combination of culture-based studies, denaturing gradient gel electrophoresis, and bacterial community characterization based on 16S rRNA gene sequencing revealed that C. prolifera contains a diverse assemblage of bacteria that is different from that in the surrounding water. C. prolifera individuals were successfully maintained in a flow-through or recirculation aquaculture system for over 6 months and shifts in the bacterial assemblages of sponges in aquaculture compared with wild sponges were examined. The proteobacteria, bacteroidetes, actinobacteria, and cyanobacteria represented over 90% of the species diversity present in the total bacterial community of the wild C. prolifera. Actinobacteria, cyanobacteria, and spirochetes were not represented in clones obtained from C. prolifera maintained in the aquaculture system although these three groups comprised ca. 20% of the clones from wild C. prolifera, showing a significant effect of aquaculture on the bacterial community composition. This is the first systematic characterization of the bacterial community from a sponge found in the Chesapeake Bay. Changes in sponge bacterial composition were observed in sponges maintained in aquaculture and demonstrate the importance of monitoring microbial communities when cultivating sponges in aquaculture systems.
Collapse
Affiliation(s)
- LeLeng To Isaacs
- Department of Biology, Goucher College, Baltimore, MD, 21204, USA
| | | | | | | | | | | | | |
Collapse
|
34
|
Roudaut R, Billès MA, Ginestes J, Randazzo W, Videau P, Dallocchio M, Bricaud H. [Outcome of echocardiographic vegetations in bacterial endocarditis during and after anti-infective therapy]. Arch Mal Coeur Vaiss 1982; 75:1061-8. [PMID: 6816171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Echocardiography is a practical and reliable method of detecting endocardial vegetations. The aim of this study was to assess the course of echocardiographic vegetations in bacterial endocarditis under anti infectious therapy and to assess the prognostic significance of the vegetations. Twenty four patients with echocardiographic signs of vegetations were included in a standardised protocol: M mode and 2D examination at the beginning and at the end of medical treatment and when possible after bacteriological cure (average period of follow-up 16 +/- 6 weeks). Special attention was paid to the volume (assessed I to III) and acoustic density of the vegetations. Fifteen patients underwent surgery (62.5%). The size of the vegetations did not differ significantly from that observed in the other patients. The size of the vegetations remained constant during medical therapy and after bacteriological cure in 2/3 of cases. The vegetations grew during medical therapy (even when the patients were apyrexic) in 29% of cases, and even after a 40 day course of anti infectious therapy in 2 cases. The size of the vegetations decreases in 3 cases during treatment (2 cases of embolisation) and in 2 cases after bacteriological cure (without embolisation). No correlations could be drawn between the acoustic density of the vegetations and the outcome. In conclusion, the presence of a large vegetation in bacterial endocarditis does not in itself mean a poor prognosis. However, these large vegetations are often associated with severe mutilating lesions (62.5% in our series). The size of the vegetations remained unchanged during and after medical treatment in two thirds of cases.
Collapse
|
35
|
|
36
|
Roudaut R, Le Guiffant C, Videau P, Clémenty J, Choussat A, Dallocchio M. [Comparison of mono and bidimensional echocardiography in the diagnosis of atrial myxoma]. Arch Mal Coeur Vaiss 1980; 73:775-84. [PMID: 6773490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The diagnosis of atrial myxoma, the most common cardiac tumour, has been greatly facilitated by the introduction of echocardiography. The principal echocardiographic features and the diagnostic pitfalls encountered in a personal series of 7 atrial myxomas (5 left and 2 right) studied by M mode and 2-dimensional echocardiography are reported. In M mode, left atrial myxoma is a relatively easy diagnosis when the tumour prolapses into the mitral orifice. On standard mitro-aortic scanning, it is recorded behind the anterior mitral leaflet as a mass of abnormal echos appearing shortly after mitral valve opening. The diagnosis is much more difficult or even impossible in nonprolapsing tumours. Right atrial myxomas, prolapsing into the tricuspid orifice, do not usually pose any diagnotic problems. 2-dimensional echocardiography shows its superiority in the early diagnosis of small, localised, relatively immobile and non-prolapsing tumours. The parasternal (long axis and transverse views), the apical (4 and 2 chamber views) and subxiphoid positions were the most useful incidences and the tumour was visualised as a more or less circumscribed mass of echos. In all cases, 2-dimensional echo provided information on the size, mobility, insertion and the length of the pedicle of the tumour. Atrial myxoma is being recognised more easily and more often nowadays by echocardiography, the diagnostic method of choice, and 2-dimensional studies should be preferred.
Collapse
|
37
|
Roudaut R, Le Guiffant G, Videau P, Clementy J, Choussat A, Dallocchio M. [Myxoma of the atrium. Diagnosis by bidimensional echocardiography]. Nouv Presse Med 1980; 9:1100. [PMID: 7465384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
38
|
Page A, Larnaudie B, Pic A, Videau P, Besse P. [Hemodynamic effects of oral dihydralazine and sublingual isosorbide dinitrate, alone and in combination in chronic heart failure]. Arch Mal Coeur Vaiss 1979; 72:1367-75. [PMID: 120154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|