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Khalil M, Stuhr M, Kunzmann A, Westphal H. Simultaneous ocean acidification and warming do not alter the lipid-associated biochemistry but induce enzyme activities in an asterinid starfish. Sci Total Environ 2024; 932:173000. [PMID: 38719050 DOI: 10.1016/j.scitotenv.2024.173000] [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] [Received: 12/18/2023] [Revised: 04/30/2024] [Accepted: 05/03/2024] [Indexed: 05/13/2024]
Abstract
Ocean acidification and warming affect marine ecosystems from the molecular scale in organismal physiology to broad alterations of ecosystem functions. However, knowledge of their combined effects on tropical-subtropical intertidal species remains limited. Pushing the environmental range of marine species away from the optimum initiates stress impacting biochemical metabolic characteristics, with consequences on lipid-associated and enzyme biochemistry. This study investigates lipid-associated fatty acids (FAs) and enzyme activities involved in biomineralization of the tropical-subtropical starfish Aquilonastra yairi in response to projected near-future global change. The starfish were acclimatized to two temperature levels (27 °C, 32 °C) crossed with three pCO2 concentrations (455 μatm, 1052 μatm, 2066 μatm). Total lipid (ΣLC) and FAs composition were unaffected by combined elevated temperature and pCO2, but at elevated temperature, there was an increase in ΣLC, SFAs (saturated FAs) and PUFAs (polyunsaturated FAs), and a decrease in MUFAs (monounsaturated FAs). However, temperature was the sole factor to significantly alter SFAs composition. Positive parabolic responses of Ca-ATPase and Mg-ATPase enzyme activities were detected at 27 °C with elevated pCO2, while stable enzyme activities were observed at 32 °C with elevated pCO2. Our results indicate that the lipid-associated biochemistry of A. yairi is resilient and capable of coping with near-future ocean acidification and warming. However, the calcification-related enzymes Ca-ATPase and Mg-ATPase activity appear to be more sensitive to pCO2/pH changes, leading to vulnerability concerning the skeletal structure.
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Affiliation(s)
- Munawar Khalil
- Leibniz Centre for Tropical Marine Research (ZMT), Fahrenheitstraße 6, 28359 Bremen, Germany; Faculty of Geosciences, University of Bremen, Klagenfurter Str. 2-4, 28359 Bremen, Germany; Department of Marine Science, Faculty of Agriculture, Universitas Malikussaleh, Reuleut Main Campus, 24355 North Aceh, Indonesia.
| | - Marleen Stuhr
- Leibniz Centre for Tropical Marine Research (ZMT), Fahrenheitstraße 6, 28359 Bremen, Germany
| | - Andreas Kunzmann
- Leibniz Centre for Tropical Marine Research (ZMT), Fahrenheitstraße 6, 28359 Bremen, Germany
| | - Hildegard Westphal
- Leibniz Centre for Tropical Marine Research (ZMT), Fahrenheitstraße 6, 28359 Bremen, Germany; Faculty of Geosciences, University of Bremen, Klagenfurter Str. 2-4, 28359 Bremen, Germany
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2
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Joppien M, Westphal H, Chandra V, Stuhr M, Doo SS. Nanoplastic incorporation into an organismal skeleton. Sci Rep 2022; 12:14771. [PMID: 36042226 PMCID: PMC9427768 DOI: 10.1038/s41598-022-18547-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/16/2022] [Indexed: 11/21/2022] Open
Abstract
Studies on the effects of global marine plastic pollution have largely focused on physiological responses of few organism groups (e.g., corals, fishes). Here, we report the first observation of polymer nanoparticles being incorporated into the calcite skeleton of a large benthic foraminifera (LBF), a significant contributor to global carbonate production. While previous work on LBF has documented selectivity in feeding behaviour and a high degree of specialization regarding skeletal formation, in this study, abundant cases of nanoplastic encrustation into the calcite tests were observed. Nanoplastic incorporation was associated with formation of new chambers, in conjunction with rapid nanoplastic ingestion and subsequent incomplete egestion. Microalgae presence in nanoplastic treatments significantly increased the initial feeding response after 1 day, but regardless of microalgae presence, nanoplastic ingestion was similar after 6 weeks of chronic exposure. While ~ 40% of ingesting LBF expelled all nanoplastics from their cytoplasm, nanoplastics were still attached to the test surface and subsequently encrusted by calcite. These findings highlight the need for further investigation regarding plastic pollution impacts on calcifying organisms, e.g., the function of LBF as potential plastic sinks and alterations in structural integrity of LBF tests that will likely have larger ecosystem-level impacts on sediment production.
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Affiliation(s)
- Marlena Joppien
- Geoecology and Carbonate Sedimentology Group, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany. .,Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. .,Department of Geosciences, University of Bremen, Bremen, Germany.
| | - Hildegard Westphal
- Geoecology and Carbonate Sedimentology Group, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany.,Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.,Department of Geosciences, University of Bremen, Bremen, Germany
| | - Viswasanthi Chandra
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Marleen Stuhr
- Geoecology and Carbonate Sedimentology Group, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
| | - Steve S Doo
- Geoecology and Carbonate Sedimentology Group, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany.,Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
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3
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Westphal H, Murphy GN, Doo SS, Mann T, Petrovic A, Schmidt C, Stuhr M. Ecosystem design as an avenue for improving services provided by carbonate producing marine ecosystems. PeerJ 2022; 10:e12785. [PMID: 35116197 PMCID: PMC8784016 DOI: 10.7717/peerj.12785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 12/21/2021] [Indexed: 01/10/2023] Open
Abstract
Ecosystem Design (ED) is an approach for constructing habitats that places human needs for ecosystem services at the center of intervention, with the overarching goal of establishing self-sustaining habitats which require limited management. This concept was originally developed for use in mangrove ecosystems, and is understandably controversial, as it markedly diverges from other protection approaches that assign human use a minor priority or exclude it. However, the advantage of ED lies within the considered implementation of these designed ecosystems, thus preserving human benefits from potential later disturbances. Here, we outline the concept of ED in tropical carbonate depositional systems and discuss potential applications to aid ecosystem services such as beach nourishment and protection of coastlines and reef islands at risk from environmental and climate change, CO2 sequestration, food production, and tourism. Biological carbonate sediment production is a crucial source of stability of reef islands and reef-rimmed coastlines. Careful implementation of designed carbonate depositional ecosystems could help counterbalance sea-level rise and manage documented erosion effects of coastal constructions. Importantly, adhering to the core ethos of ED, careful dynamic assessments which provide a balanced approach to maximizing ecosystem services (e.g., carbonate production), should identify and avoid any potential damages to existing functioning ecosystems.
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Affiliation(s)
- Hildegard Westphal
- Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany,Geoscience Department, Universität Bremen, Bremen, Germany,King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Gary N. Murphy
- Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
| | - Steve S. Doo
- Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany,King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Thomas Mann
- Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover, Germany
| | - Alexander Petrovic
- King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | | | - Marleen Stuhr
- Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany,Inter-University Institute for Marine Sciences (IUI), Eilat, Israel,Bar-Ilan University, Ramat Gan, Israel
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4
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Prazeres M, Roberts TE, Ramadhani SF, Doo SS, Schmidt C, Stuhr M, Renema W. Diversity and flexibility of algal symbiont community in globally distributed larger benthic foraminifera of the genus Amphistegina. BMC Microbiol 2021; 21:243. [PMID: 34488648 PMCID: PMC8422653 DOI: 10.1186/s12866-021-02299-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 08/23/2021] [Indexed: 01/04/2023] Open
Abstract
Background Understanding the specificity and flexibility of the algal symbiosis-host association is fundamental for predicting how species occupy a diverse range of habitats. Here we assessed the algal symbiosis diversity of three species of larger benthic foraminifera from the genus Amphistegina and investigated the role of habitat and species identity in shaping the associated algal community. Results We used next-generation sequencing to identify the associated algal community, and DNA barcoding to identify the diatom endosymbionts associated with species of A. lobifera, A. lessonii, and A. radiata, collected from shallow habitats (< 15 m) in 16 sites, ranging from the Mediterranean Sea to French Polynesia. Next-generation sequencing results showed the consistent presence of Ochrophyta as the main algal phylum associated with all species and sites analysed. A significant proportion of phylotypes were classified as Chlorophyta and Myzozoa. We uncovered unprecedented diversity of algal phylotypes found in low abundance, especially of the class Bacillariophyta (i.e., diatoms). We found a significant influence of sites rather than host identity in shaping algal communities in all species. DNA barcoding revealed the consistent presence of phylotypes classified within the order Fragilariales as the diatoms associated with A. lobifera and A. lessonii, while A. radiata specimens host predominately diatoms of the order Triceratiales. Conclusions We show that local habitat is the main factor influencing the overall composition of the algal symbiont community. However, host identity and the phylogenetic relationship among hosts is relevant in shaping the specific endosymbiont diatom community, suggesting that the relationship between diatom endosymbiont and hosts plays a crucial role in the evolutionary history of the genus Amphistegina. The capacity of Amphistegina species to associate with a diverse array of diatoms, and possibly other algal groups, likely underpins the ecological success of these crucial calcifying organisms across their extensive geographic range. Supplementary Information The online version contains supplementary material available at 10.1186/s12866-021-02299-8.
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Affiliation(s)
| | | | | | - Steve S Doo
- Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany.,Department of Biology, California State University, Northridge, USA
| | - Christiane Schmidt
- MARUM, University of Bremen, Bremen, Germany.,University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Marleen Stuhr
- Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany.,Interuniversity Institute for Marine Sciences (IUI), Eilat, Israel.,Bar-Ilan University (BIU), Ramat Gan, Israel
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5
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Helber SB, Winters G, Stuhr M, Belshe EF, Bröhl S, Schmid M, Reuter H, Teichberg M. Nutrient History Affects the Response and Resilience of the Tropical Seagrass Halophila stipulacea to Further Enrichment in Its Native Habitat. Front Plant Sci 2021; 12:678341. [PMID: 34421939 PMCID: PMC8374242 DOI: 10.3389/fpls.2021.678341] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 07/12/2021] [Indexed: 06/13/2023]
Abstract
Eutrophication is one of the main threats to seagrass meadows, but there is limited knowledge on the interactive effects of nutrients under a changing climate, particularly for tropical seagrass species. This study aimed to detect the onset of stress in the tropical seagrass, Halophila stipulacea, by investigating the effect of in situ nutrient addition during an unusually warm summer over a 6-month period. We measured a suite of different morphological and biochemical community metrics and individual plant traits from two different sites with contrasting levels of eutrophication history before and after in situ fertilization in the Gulf of Aqaba. Nutrient stress combined with summer temperatures that surpassed the threshold for optimal growth negatively affected seagrass plants from South Beach (SB), an oligotrophic marine protected area, while H. stipulacea populations from North Beach (NB), a eutrophic and anthropogenically impacted area, benefited from the additional nutrient input. Lower aboveground (AG) and belowground (BG) biomass, reduced Leaf Area Index (LAI), smaller internodal distances, high sexual reproductive effort and the increasing occurrence of apical shoots in seagrasses from SB sites indicated that the plants were under stress and not growing under optimal conditions. Moreover, AG and BG biomass and internodal distances decreased further with the addition of fertilizer in SB sites. Results presented here highlight the fact that H. stipulacea is one of the most tolerant and plastic seagrass species. Our study further demonstrates that the effects of fertilization differ significantly between meadows that are growing exposed to different levels of anthropogenic pressures. Thus, the meadow's "history" affects it resilience and response to further stress. Our results suggest that monitoring efforts on H. stipulacea populations in its native range should focus especially on carbohydrate reserves in leaves and rhizomes, LAI, internodal length and percentage of apical shoots as suitable warning indicators for nutrient stress in this seagrass species to minimize future impacts on these valuable ecosystems.
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Affiliation(s)
- Stephanie B. Helber
- Leibniz Centre for Tropical Marine Research (ZMT) GmbH, Bremen, Germany
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany
| | - Gidon Winters
- The Dead Sea and Arava Science Center (ADSSC), Jerusalem, Israel
- Ben-Gurion University of the Negev, Eilat, Israel
| | - Marleen Stuhr
- Tropical Coral Ecophysiology, Interuniversity Institute for Marine Sciences - Eilat (IUI), Eilat, Israel
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University (BIU), Ramat Gan, Israel
| | - E. F. Belshe
- Leibniz Centre for Tropical Marine Research (ZMT) GmbH, Bremen, Germany
| | - Stefanie Bröhl
- Leibniz Centre for Tropical Marine Research (ZMT) GmbH, Bremen, Germany
| | - Michael Schmid
- Leibniz Centre for Tropical Marine Research (ZMT) GmbH, Bremen, Germany
| | - Hauke Reuter
- Leibniz Centre for Tropical Marine Research (ZMT) GmbH, Bremen, Germany
- Faculty for Biology and Chemistry, University of Bremen, Bremen, Germany
| | - Mirta Teichberg
- Leibniz Centre for Tropical Marine Research (ZMT) GmbH, Bremen, Germany
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6
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Prazeres M, Morard R, Roberts TE, Doo SS, Jompa J, Schmidt C, Stuhr M, Renema W, Kucera M. High dispersal capacity and biogeographic breaks shape the genetic diversity of a globally distributed reef-dwelling calcifier. Ecol Evol 2020; 10:5976-5989. [PMID: 32607205 PMCID: PMC7319125 DOI: 10.1002/ece3.6335] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 12/23/2022] Open
Abstract
Understanding the role of dispersal and adaptation in the evolutionary history of marine species is essential for predicting their response to changing conditions. We analyzed patterns of genetic differentiation in the key tropical calcifying species of large benthic foraminifera Amphistegina lobifera to reveal the evolutionary processes responsible for its biogeographic distribution. We collected specimens from 16 sites encompassing the entire range of the species and analyzed hypervariable fragments of the 18S SSU rDNA marker. We identified six hierarchically organized genotypes with mutually exclusive distribution organized along a longitudinal gradient. The distribution is consistent with diversification occurring in the Indo-West Pacific (IWP) followed by dispersal toward the periphery. This pattern can be explained by: (a) high dispersal capacity of the species, (b) habitat heterogeneity driving more recent differentiation in the IWP, and (c) ecological-scale processes such as niche incumbency reinforcing patterns of genotype mutual exclusion. The dispersal potential of this species drives the ongoing range expansion into the Mediterranean Sea, indicating that A. lobifera is able to expand its distribution by tracking increases in temperature. The genetic structure reveals recent diversification and high rate of extinction in the evolutionary history of the clade suggesting a high turnover rate of the diversity at the cryptic level. This diversification dynamic combined with high dispersal potential, allowed the species to maintain a widespread distribution over periods of geological and climatic upheaval. These characteristics are likely to allow the species to modify its geographic range in response to ongoing global warming without requiring genetic differentiation.
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Affiliation(s)
- Martina Prazeres
- Marine Biodiversity GroupNaturalis Biodiversity CenterLeidenThe Netherlands
| | | | - T. Edward Roberts
- Marine Biodiversity GroupNaturalis Biodiversity CenterLeidenThe Netherlands
| | - Steve S. Doo
- Leibniz Centre for Tropical Marine ResearchBremenGermany
- Department of BiologyCalifornia State UniversityNorthridgeCAUSA
| | | | | | - Marleen Stuhr
- Leibniz Centre for Tropical Marine ResearchBremenGermany
- Interuniversity Institute for Marine Sciences (IUI)EilatIsrael
- Bar‐Ilan University (BIU)Ramat GanIsrael
| | - Willem Renema
- Marine Biodiversity GroupNaturalis Biodiversity CenterLeidenThe Netherlands
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7
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Vij VO, Al-Kassou B, Nelles D, Stuhr M, Schueler R, Omran H, Schrickel J, Hammerstingl C, Nickenig G, Sedaghat A. P1002Echocardiographic assessment of optimal device position after percutaneous left atrial appendage occlusion - introduction of a novel classification and its impact on outcome. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Left atrial appendage occlusion (LAAo) is an established therapy in patients with atrial fibrillation. However, criteria regarding optimal device position are not well defined making comparability of procedural results virtually impossible. We therefore sought to a) introduce a classification describing optimal vs. suboptimal device-position by assessing predefined parameters in transoesophageal echocardiography (TEE) and to b) analyze the impact of device-position on outcome in patients treated with different LAAo devices.
Methods and results
We retrospectively analyzed 120 patients who were treated by LAAo and had undergone follow-up TEEs after 3 or 6 months. Patients were at mean age: 76±8 years; female 40% and presented an increased CHADS-VASC- (4.6±1.4) and HAS-BLED-score (3.7±1). TEE-guidance was performed in all cases.
In 62.5% (75/120) pacifier occluders (PO) (ACP/Amulet, Lambre, Ultraseal) were used, whereas 37.5% (45/120) were treated with non-pacifier occluders (NPO) (Watchman, Wavecrest, Occlutech). To assess device position, TEE images in a commissural view (60–90°) were analyzed and characterised by 1) implantation depth in the left atrial appendage, 2) peridevice flow (PF) and 3) the angle between occluder disc and pulmonal ridge (LUPV). For the purpose of this study, optimal device position was defined as a) ostial (LUPV length <10mm) or slightly subostial position (LUPV length ≤15mm, angle ≥100°) with b) the absence of major PF (>3mm).
Overall, occluders were implanted at a depth of 12±7.8 mm with ostial positioning being achieved in 47.5% (57/120). Major PF was seen in 7.5% (9/120). NPOs were implanted deeper than POs (depth: 15.6±7.1 vs. 9.8±7.4 mm, p<0.01; ostial position: 31.1% vs. 57.3%, p<0.01) and were associated with a higher incidence of major PF (15.6% vs. 2.7%, p=0.01). Also, the depth/angle ratio was higher (i.e. “worse”) in NPOs (18.3±9 vs. 14.6±8, p<0.04). As a result, optimal device position was achieved in 48.3% (58/120) of all patients, with lower rates in NPOs than in POs (26.7% vs. 61.3%, p<0.01). Procedural aspects revealed slight differences in occluder size (optimal: 23.7±3.2 vs. suboptimal: 24.5±3.7 mm, p=0.3), need for repositioning (10.3% vs. 17.7%, p=0.25) and procedural duration (48±36 vs. 52±34 min, p=0.3).
Of interest, device related thrombi (DRT) occurred less frequently in optimally implanted devices (3.4% vs. 12.9%, p=0.06). Hereby, implantation depth and depth/angle ratio were found to be predictors for DRT in ROC-analysis, respectively (AUC: 0.7, 95% Confidence interval [CI]: 0.56–0.84, p=0.05 and AUC: 0.72, 95% CI: 0.58–0.86, p=0.03).
Optimal vs. suboptimal position
Conclusion
Echocardiographic classification of device-position is warranted to provide comparability and appears to be feasible. Based on the novel classification provided, optimal device-position is achieved in 50% and is found more often with the use of POs. DRT appeared to occur more often in suboptimal device-position.
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Affiliation(s)
- V O Vij
- University Hospital Bonn, Bonn, Germany
| | | | - D Nelles
- University Hospital Bonn, Bonn, Germany
| | - M Stuhr
- University Hospital Bonn, Bonn, Germany
| | | | - H Omran
- St. Marien Hospital Bonn, Bonn, Germany
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8
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Nettersheim BJ, Brocks JJ, Schwelm A, Hope JM, Not F, Lomas M, Schmidt C, Schiebel R, Nowack ECM, De Deckker P, Pawlowski J, Bowser SS, Bobrovskiy I, Zonneveld K, Kucera M, Stuhr M, Hallmann C. Putative sponge biomarkers in unicellular Rhizaria question an early rise of animals. Nat Ecol Evol 2019; 3:577-581. [DOI: 10.1038/s41559-019-0806-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 01/10/2019] [Indexed: 11/09/2022]
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9
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Sedaghat A, Al-Kassou B, Vij V, Nelles D, Stuhr M, Schueler R, Weber M, Omran H, Schrickel JW, Hammerstingl C, Nickenig G. P5097Contrast-free echocardiography-guided LAA closure - a propensity matched study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5097] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A Sedaghat
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - B Al-Kassou
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - V Vij
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - D Nelles
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - M Stuhr
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - R Schueler
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - M Weber
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - H Omran
- St. Marien Hospital Bonn, Klinik für Innere Medizin, Bonn, Germany
| | - J W Schrickel
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - C Hammerstingl
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
| | - G Nickenig
- University of Bonn, Department of Internal Medicine II – Cardiology, Pulmonology & Angiology, Bonn, Germany
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10
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Stuhr M, Blank-Landeshammer B, Reymond CE, Kollipara L, Sickmann A, Kucera M, Westphal H. Disentangling thermal stress responses in a reef-calcifier and its photosymbionts by shotgun proteomics. Sci Rep 2018; 8:3524. [PMID: 29476118 PMCID: PMC5824892 DOI: 10.1038/s41598-018-21875-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 02/08/2018] [Indexed: 01/01/2023] Open
Abstract
The proliferation of key marine ecological engineers and carbonate producers often relies on their association with photosymbiotic algae. Evaluating stress responses of these organisms is important to predict their fate under future climate projections. Physiological approaches are limited in their ability to resolve the involved molecular mechanisms and attribute stress effects to the host or symbiont, while probing and partitioning of proteins cannot be applied in organisms where the host and symbiont are small and cannot be physically separated. Here we apply a label-free quantitative proteomics approach to detect changes of proteome composition in the diatom-bearing benthic foraminifera Amphistegina gibbosa experimentally exposed to three thermal-stress scenarios. We developed a workflow for protein extraction from less than ten specimens and simultaneously analysed host and symbiont proteomes. Despite little genomic data for the host, 1,618 proteins could be partially assembled and assigned. The proteomes revealed identical pattern of stress response among stress scenarios as that indicated by physiological measurements, but allowed identification of compartment-specific stress reactions. In the symbiont, stress-response and proteolysis-related proteins were up regulated while photosynthesis-related proteins declined. In contrast, host homeostasis was maintained through chaperone up-regulation associated with elevated proteosynthesis and proteolysis, and the host metabolism shifted to heterotrophy.
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Affiliation(s)
- Marleen Stuhr
- Biogeochemistry and Geology, Leibniz Centre for Tropical Marine Research (ZMT), 28359, Bremen, Germany.
| | | | - Claire E Reymond
- Biogeochemistry and Geology, Leibniz Centre for Tropical Marine Research (ZMT), 28359, Bremen, Germany
| | - Laxmikanth Kollipara
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44139, Dortmund, Germany
| | - Albert Sickmann
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44139, Dortmund, Germany.,Medizinische Fakultät, Medizinische Proteom-Center (MPC), Ruhr-Universität Bochum, 44801, Bochum, Germany.,Department of Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen, AB24 3FX, Scotland, United Kingdom
| | - Michal Kucera
- MARUM, Center for Marine Environmental Sciences, University of Bremen, 28359, Bremen, Germany
| | - Hildegard Westphal
- Biogeochemistry and Geology, Leibniz Centre for Tropical Marine Research (ZMT), 28359, Bremen, Germany.,Department of Geosciences, University of Bremen, Bremen, Germany
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11
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Stuhr M, Reymond CE, Rieder V, Hallock P, Rahnenführer J, Westphal H, Kucera M. Reef calcifiers are adapted to episodic heat stress but vulnerable to sustained warming. PLoS One 2017; 12:e0179753. [PMID: 28683118 PMCID: PMC5500281 DOI: 10.1371/journal.pone.0179753] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [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: 03/31/2017] [Accepted: 06/02/2017] [Indexed: 12/28/2022] Open
Abstract
Shallow marine ecosystems naturally experience fluctuating physicochemical conditions across spatial and temporal scales. Widespread coral-bleaching events, induced by prolonged heat stress, highlight the importance of how the duration and frequency of thermal stress influence the adaptive physiology of photosymbiotic calcifiers. Large benthic foraminifera harboring algal endosymbionts are major tropical carbonate producers and bioindicators of ecosystem health. Like corals, they are sensitive to thermal stress and bleach at temperatures temporarily occurring in their natural habitat and projected to happen more frequently. However, their thermal tolerance has been studied so far only by chronic exposure, so how they respond under more realistic episodic heat-event scenarios remains unknown. Here, we determined the physiological responses of Amphistegina gibbosa, an abundant western Atlantic foraminifera, to four different treatments––control, single, episodic, and chronic exposure to the same thermal stress (32°C)––in controlled laboratory cultures. Exposure to chronic thermal stress reduced motility and growth, while antioxidant capacity was elevated, and photosymbiont variables (coloration, oxygen-production rates, chlorophyll a concentration) indicated extensive bleaching. In contrast, single- and episodic-stress treatments were associated with higher motility and growth, while photosymbiont variables remained stable. The effects of single and episodic heat events were similar, except for the presumable occurrence of reproduction, which seemed to be suppressed by both episodic and chronic stress. The otherwise different responses between treatments with thermal fluctuations and chronic stress indicate adaptation to thermal peaks, but not to chronic exposure expected to ensue when baseline temperatures are elevated by climate change. This firstly implies that marine habitats with a history of fluctuating thermal stress potentially support resilient physiological mechanisms among photosymbiotic organisms. Secondly, there seem to be temporal constraints related to heat events among coral reef environments and reinforces the importance of temporal fluctuations in stress exposure in global-change studies and projections.
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Affiliation(s)
- Marleen Stuhr
- Department of Biogeochemistry and Geology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
- * E-mail:
| | - Claire E. Reymond
- Department of Biogeochemistry and Geology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
| | - Vera Rieder
- Department of Statistics, TU Dortmund University, Dortmund, Germany
| | - Pamela Hallock
- College of Marine Science, University of South Florida, St. Petersburg, Florida, United States of America
| | | | - Hildegard Westphal
- Department of Biogeochemistry and Geology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
- Department of Geosciences, University of Bremen, Bremen, Germany
| | - Michal Kucera
- MARUM, Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
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12
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Abstract
There are considerable similarities and intersections between forensic medicine and emergency medicine. This applies especially to frustraneously resuscitated patients or other lethal clinical courses of traumatized patients who are subject to latter forensic autopsy. Cooperation between departments of emergency and forensic medicine not only has emergency medical training potential, but also the possibility of retrospective evaluation of medical emergency measures - both in individual cases and with regard to epidemiological aspects. In particular, the widespread registration of autopsied pre-hospital trauma deaths that occurred despite on-scene resuscitation attempts is useful. The pre-hospital situation represents a hotspot, but also a blind spot in the overall trauma mortality. In recent clinical registers, preclinical deaths go mostly unrecorded, despite the undisputed benefits of clinical registers.
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Affiliation(s)
- C Buschmann
- Institut für Rechtsmedizin, Charité - Universitätsmedizin Berlin, Turmstr. 21, Haus N, 10559, Berlin, Deutschland.
| | - C Kleber
- UniversitätsCentrum für Orthopädie und Unfallchirurgie, AG Polytrauma, Medizinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Dresden, Deutschland
| | - M Tsokos
- Institut für Rechtsmedizin, Charité - Universitätsmedizin Berlin, Turmstr. 21, Haus N, 10559, Berlin, Deutschland
| | - T Kerner
- Abteilung für Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie, Asklepios Klinikum Harburg, Hamburg, Deutschland
| | - K Püschel
- Institut für Rechtsmedizin, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland
| | - U Schmidt
- Institut für Rechtsmedizin, Medizinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Dresden, Deutschland
| | - H Fischer
- Brandenburgisches Landesinstitut für Rechtsmedizin, Potsdam, Deutschland
| | - M Stuhr
- Abteilung für Anästhesie, Intensiv- und Rettungsmedizin, Zentrum für Schmerztherapie, Berufsgenossenschaftliches Unfallkrankenhaus Hamburg, Hamburg, Deutschland
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13
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Stuhr M, Dethleff D, Weinrich N, Nielsen M, Hory D, Kowald B, Seide K, Kerner T, Nau C, Jürgens C. [Medical Emergency Preparedness in offshore wind farms : New challenges in the german north and baltic seas]. Anaesthesist 2017; 65:369-79. [PMID: 27072312 DOI: 10.1007/s00101-016-0154-7] [Citation(s) in RCA: 7] [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] [Indexed: 11/29/2022]
Abstract
BACKGROUND Offshore windfarms are constructed in the German North and Baltic Seas. The off-coast remoteness of the windfarms, particular environmental conditions, limitations in offshore structure access, working in heights and depths, and the vast extent of the offshore windfarms cause significant challenges for offshore rescue. Emergency response systems comparable to onshore procedures are not fully established yet. Further, rescue from offshore windfarms is not part of the duty of the German Maritime Search and Rescue Organization or SAR-Services due to statute and mandate reasons. Scientific recommendations or guidelines for rescue from offshore windfarms are not available yet. The present article reflects the current state of medical care and rescue from German offshore windfarms and related questions. The extended therapy-free interval until arrival of the rescue helicopter requires advanced first-aid measures as well as improved first-aider qualification. Rescue helicopters need to be equipped with a winch system in order to dispose rescue personnel on the wind turbines, and to hoist-up patients. For redundancy reasons and for conducting rendezvous procedures, adequate sea-bound rescue units need to be provided. In the light of experiences from the offshore oil and gas industry and first offshore wind analyses, the availability of professional medical personnel in offshore windfarms seems advisible. Operational air medical rescue services and specific offshore emergency reaction teams have established a powerful rescue chain. Besides the present development of medical standards, more studies are necessary in order to place the rescue chain on a long-term, evidence-based groundwork. A central medical offshore registry may help to make a significant contribution at this point.
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Affiliation(s)
- M Stuhr
- Abt. für Anästhesie, Intensiv-, Rettungs- und Schmerzmedizin, BG Klinikum Hamburg, Bergedorfer Straße 10, 21033, Hamburg, Deutschland.
| | - D Dethleff
- Labor für Biomechanik, BG Klinikum Hamburg, Hamburg, Deutschland
| | - N Weinrich
- Labor für Biomechanik, BG Klinikum Hamburg, Hamburg, Deutschland
| | - M Nielsen
- Abt. für Unfallchirurgie, Orthopädie und Sporttraumatologie, BG Klinikum Hamburg, Hamburg, Deutschland.,Chirurgische Klinik, Israelitisches Krankenhaus Hamburg, Hamburg, Deutschland
| | - D Hory
- Abt. für Unfallchirurgie, Orthopädie und Sporttraumatologie, BG Klinikum Hamburg, Hamburg, Deutschland
| | - B Kowald
- Labor für Biomechanik, BG Klinikum Hamburg, Hamburg, Deutschland
| | - K Seide
- Labor für Biomechanik, BG Klinikum Hamburg, Hamburg, Deutschland.,Abt. für Unfallchirurgie, Orthopädie und Sporttraumatologie, BG Klinikum Hamburg, Hamburg, Deutschland
| | - T Kerner
- Abt. für Anästhesie, Intensivmedizin, Notfallmedizin, Schmerztherapie, Asklepios Klinikum Harburg, Hamburg, Deutschland
| | - C Nau
- Klinik für Anästhesiologie und Intensivmedizin, Campus Lübeck, Universitätsklinikum Schleswig-Holstein, Lübeck, Deutschland
| | - C Jürgens
- Labor für Biomechanik, BG Klinikum Hamburg, Hamburg, Deutschland.,Abt. für Unfallchirurgie, Orthopädie und Sporttraumatologie, BG Klinikum Hamburg, Hamburg, Deutschland
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14
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Rieder V, Blank-Landeshammer B, Stuhr M, Schell T, Biß K, Kollipara L, Meyer A, Pfenninger M, Westphal H, Sickmann A, Rahnenführer J. DISMS2: A flexible algorithm for direct proteome- wide distance calculation of LC-MS/MS runs. BMC Bioinformatics 2017; 18:148. [PMID: 28253837 PMCID: PMC5335755 DOI: 10.1186/s12859-017-1514-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 01/31/2017] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND The classification of samples on a molecular level has manifold applications, from patient classification regarding cancer treatment to phylogenetics for identifying evolutionary relationships between species. Modern methods employ the alignment of DNA or amino acid sequences, mostly not genome-wide but only on selected parts of the genome. Recently proteomics-based approaches have become popular. An established method for the identification of peptides and proteins is liquid chromatography-tandem mass spectrometry (LC-MS/MS). First, protein sequences from MS/MS spectra are identified by means of database searches, given samples with known genome-wide sequence information, then sequence based methods are applied. Alternatively, de novo peptide sequencing algorithms annotate MS/MS spectra and deduce peptide/protein information without a database. A newer approach independent of additional information is to directly compare unidentified tandem mass spectra. The challenge then is to compute the distance between pairwise MS/MS runs consisting of thousands of spectra. METHODS We present DISMS2, a new algorithm to calculate proteome-wide distances directly from MS/MS data, extending the algorithm compareMS2, an approach that also uses a spectral comparison pipeline. RESULTS Our new more flexible algorithm, DISMS2, allows for the choice of the spectrum distance measure and includes different spectra preprocessing and filtering steps that can be tailored to specific situations by parameter optimization. CONCLUSIONS DISMS2 performs well for samples from species with and without database annotation and thus has clear advantages over methods that are purely based on database search.
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Affiliation(s)
- Vera Rieder
- Department of Statistics, TU Dortmund University, Dortmund, Germany
| | | | - Marleen Stuhr
- Leibniz Center for Tropical Marine Ecology (ZMT), Bremen, Germany
| | - Tilman Schell
- Biodiversity and Climate Research Centre, Senckenberg Gesellschaft für Naturforschung, Frankfurt, Germany
| | - Karsten Biß
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Dortmund, Germany
| | - Laxmikanth Kollipara
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Dortmund, Germany
| | - Achim Meyer
- Leibniz Center for Tropical Marine Ecology (ZMT), Bremen, Germany
| | - Markus Pfenninger
- Biodiversity and Climate Research Centre, Senckenberg Gesellschaft für Naturforschung, Frankfurt, Germany
- Faculty of Biological Science, Institute for Ecology, Evolution and Diversity, Department of Molecular Ecology, Goethe University, Max-von-Laue-Straße 9, Frankfurt am Main, 60438 Germany
| | | | - Albert Sickmann
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Dortmund, Germany
- Department of Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen, Scotland, United Kingdom
- Medizinische Fakultät, Medizinisches Proteom-Center (MPC), Ruhr-Universität Bochum, Universitätsstraße 150, Bochum, 44801 Germany
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15
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16
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Affiliation(s)
- M. Stuhr
- Abteilung für Anästhesie, Intensiv- und Rettungsmedizin, Zentrum für Schmerztherapie, BG Unfallkrankenhaus Hamburg
| | - G. Kraus
- Berufsgenossenschaft Energie Textil Elektro Medienerzeugnisse, Präventionsabteilung, Fachgebiet Arbeitsmedizin, Augsburg
| | - N. Weinrich
- Labor für Biomechanik, BG Unfallkrankenhaus Hamburg
| | - C. Jürgens
- Abteilung für Unfallchirurgie, Orthopädie und Sporttraumatologie, BG Unfallkrankenhaus Hamburg
| | - P. Sefrin
- DIVI-Sektion Notfall- und Katastrophenmedizin, Berlin
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Harding U, Diederich J, Stuhr M, Reifferscheid F. Triage for mass gatherings—A new computer-based approach. Resuscitation 2010. [DOI: 10.1016/j.resuscitation.2010.09.346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Stuhr M, Gille J, Lüthke M, Kappus S, Püschel K, Faschingbauer M. Herzbeuteltamponade nach thorakaler Stichverletzung bei einem Kind. Notf Rett Med 2009. [DOI: 10.1007/s10049-009-1200-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Westphal K, Weinbrenner A, Giessmann T, Stuhr M, Franke G, Zschiesche M, Oertel R, Terhaag B, Kroemer HK, Siegmund W. Oral bioavailability of digoxin is enhanced by talinolol: evidence for involvement of intestinal P-glycoprotein. Clin Pharmacol Ther 2000; 68:6-12. [PMID: 10945310 DOI: 10.1067/mcp.2000.107579] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Recent data indicated that disposition of oral digoxin is modulated by intestinal P-glycoprotein. The cardioselective beta-blocker talinolol has been described to be secreted by way of P-glycoprotein into the lumen of the gastrointestinal tract after oral and intravenous administration. We therefore hypothesized that coadministration of digoxin and talinolol may lead to a drug-drug interaction based on a competition for intestinal P-glycoprotein. METHODS Pharmacokinetics of digoxin (0.5 mg orally), talinolol (30 mg intravenously and 100 mg orally), and digoxin plus talinolol orally, as well as digoxin plus talinolol intravenously, were assessed in five male and five female healthy volunteers (age range, 23 to 30 years; body weight, 60 to 95 kg) in a changeover study with at least a 7-day washout period. Digoxin and talinolol were analyzed by fluorescence polarization immunoassay and HPLC, respectively. RESULTS Oral coadministration of 100 mg talinolol increased the area under the concentration-time curve (AUC) from 0 to 6 hours and the AUC from 0 to 72 hours of digoxin significantly by 18% and 23%, respectively (5.85+/-1.49 versus 7.22+/-1.29 ng x h/mL and 23.0+/-3.3 versus 27.1+/-3.7 ng x h/mL, for both P<.05) and the maximum serum levels by 45%. Renal clearance and half-life of digoxin remained unchanged. Coinfusion of 30 mg talinolol with oral digoxin had no significant effects on digoxin pharmacokinetics. Digoxin did not affect the disposition of talinolol after both oral and intravenous administration. CONCLUSION We observed a significantly increased bioavailability of digoxin with oral coadministration of talinolol, which is most likely caused by competition for intestinal P-glycoprotein.
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Affiliation(s)
- K Westphal
- Division of Clinical Pharmacology, Institute of Pharmacology, Ernst Moritz Arndt University, Greifswald, Germany
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