Plastic Polymers and Antibiotic Resistance in an Antarctic Environment (Ross Sea): Are We Revealing the Tip of an Iceberg? DOI Creative Commons
Gabriella Caruso, Maurizio Azzaro, Ombretta Dell’Acqua

и другие.

Microorganisms, Год журнала: 2024, Номер 12(10), С. 2083 - 2083

Опубликована: Окт. 17, 2024

Microbial colonization of plastic polymers in Antarctic environments is an under-investigated issue. While several studies are documenting the spread pollution Ross Sea, whether formation a plastisphere (namely complex microbial assemblage colonizing plastics) may favor antibiotic-resistant bacteria (ARB) this marine environment unknown yet. A experiment was performed ecosystem, aiming at exploring potential role as reservoir antibiotic resistance. To end, biofilm-producing activity and susceptibility profiles bacterial strains isolated from biofilms submerged polyvinylchloride polyethylene panels were screened. The carried out two different sites namely Road Bay Tethys Bay. Most isolates able to produce biofilm; multidrug resistances detected members associated PVC PE (also named plastisphere), well surrounding water. lowest percentage ARB found PE-associated not-impacted (control) Punta Stocchino station, whereas highest one PVC-associated station. However, no selective enrichment relation study or either type material observed, suggesting that resistance antibiotics generalized widespread phenomenon. Resistance against all three classes assayed (i.e., cell wall antibiotics, nucleic acids, protein synthesis inhibitors) observed. high showing remote like ones, suffering increasing anthropic pressure, points emerging threat with pathogenic risk needs further deepening studies.

Язык: Английский

Anti-Neuroinflammatory Effects of Prenylated Indole Alkaloids from the Antarctic Fungus Aspergillus sp. Strain SF-7367 DOI Creative Commons
Zhiming Liu,

Chi–Su Yoon,

Thao Quyen Cao

и другие.

Molecules, Год журнала: 2025, Номер 30(2), С. 294 - 294

Опубликована: Янв. 13, 2025

Inflammation has always been considered a trigger or consequence of neurodegenerative diseases, and the inhibition inflammation in central nervous system can effectively protect nerve cells. Several studies have indicated that various natural products inhibit neuroinflammation. Among these, Antarctic fungal metabolites pharmacological activities developmental value. Therefore, this study aimed to evaluate anti-neuroinflammatory activity an fungus belonging Aspergillus (strain SF-7367). Secondary SF-7367 were isolated using high-performance liquid chromatography followed by validation their anti-inflammatory effects lipopolysaccharide-stimulated BV2 microglia RAW264.7 macrophages. Chemical analysis from strain revealed five known compounds: epideoxybrevianamide E (1), brevianamide V/W (2), K (3), Q (4), R (5). these compounds, showed significant against both cell types. Results Western blotting molecular docking could regulate activation nuclear factor kappa-light-chain-enhancer activated B (NF-κB) signaling. This indicates present sp. SF-7367) inflammatory responses reducing lipopolysaccharide-induced translocation NF-κB (p65). These findings suggest are candidate agents for treating diseases.

Язык: Английский

Процитировано

1
Bacterial Diversity of Marine Biofilm Communities in Terra Nova Bay (Antarctica) by Culture‐Dependent and ‐Independent Approaches DOI Creative Commons

Bisaccia Melissa,

Elisa Binda, Gabriella Caruso

и другие.

Environmental Microbiology, Год журнала: 2025, Номер 27(2)

Опубликована: Фев. 1, 2025

ABSTRACT Applying both culture‐independent and ‐dependent approaches, bacterial diversity of marine biofilm communities colonising polyvinyl chloride panels submerged in Terra Nova Bay (Ross Sea, Antarctica) was investigated. Panels were deployed two sites subjected to a different degree anthropogenic impact (Road [RB] impacted site Punta Stocchino [PTS] control site). Biofilm samples collected after 3 or 12 months evaluate short‐ long‐term microbial colonisation. Taxonomic composition the community studied by 16S rRNA gene amplicon sequencing. Proteobacteria predominant phylum, followed Bacteroidetes , Actinobacteria Verrucomicrobia Firmicutes . Impacted RB biofilms found contain relevant fraction potentially pathogenic genera, accounting for 27.49% whole community. A total 86 psychrotolerant strains isolated from using culture‐dependent techniques designed enrich These assigned three phyla: (54.65%), (32.56%) (12.79%). 2.73% genera identified metabarcoding recovered also through cultivation, while 11 additional uniquely yielded cultivation. Functional screening isolates revealed their hydrolytic oxidative enzyme activity patterns, giving new insights into metabolic biotechnological potential seawater.

Язык: Английский

Процитировано

1
Plastisphere in an Antarctic environment: A microcosm approach DOI Creative Commons
Pere Monràs-Riera, Conxita Àvila, Elisenda Ballesté

и другие.

Marine Pollution Bulletin, Год журнала: 2024, Номер 208, С. 116961 - 116961

Опубликована: Сен. 17, 2024

Язык: Английский

Процитировано

3
Anthill clay activated Ocimum gratissimum extract for effective adsorption of methylene blue and chromium (VI) ion from wastewater: Insights into the adsorption isotherms, kinetics, thermodynamics, and mechanisms DOI Creative Commons
Lukman Shehu Mustapha,

Samuel Oluwaseun Kolade,

Sodiq Olayemi Durosinmi

и другие.

Journal of Water Process Engineering, Год журнала: 2024, Номер 67, С. 106286 - 106286

Опубликована: Окт. 4, 2024

Язык: Английский

Процитировано

3
Long-term monitoring of biofilm succession unveils differences between biodegradable and conventional plastic materials DOI
Anna Marín, Patricia Feijóo, Belén Carbonetto

и другие.

Marine Pollution Bulletin, Год журнала: 2025, Номер 214, С. 117820 - 117820

Опубликована: Март 15, 2025

Язык: Английский

Процитировано

0
Checklist of pioneer benthic taxa found on Autonomous Reef Monitoring Structures (ARMS) in Terra Nova Bay (Ross Sea, Antarctica) DOI Creative Commons
Valentina Cometti, Matteo Cecchetto, Alice Guzzi

и другие.

Biodiversity Data Journal, Год журнала: 2025, Номер 13

Опубликована: Апрель 8, 2025

Benthic communities studies in the Southern Ocean highlight their potential for assessing climate and anthropogenic impacts. However, lack of standardised methods limits result reliability interpretation. This dataset presents first checklist focus on Antarctic pioneer benthic collected using a approach such as Autonomous Reef Monitoring Structures (ARMS) located at 25 m depth surroundings Italian research station "Mario Zucchelli" (MZS) Terra Nova Bay (TNB) area Ross Sea, Antarctica. The data encompass ARMS time series corresponding to deployments 1, 2, 3 5 years, from which 277 occurrence 12 phyla, 43 families, 49 genera 39 species were obtained. All retrieved specimens are curated by National Museum (MNA, section Genoa). is contribution Biodiversity Portal, thematic node both Biogeographic Information System (AntOBIS) Global Facility (ANTABIF). was uploaded integrated with SCAR-AntOBIS database under licence CC-BY 4.0. Please follow guidelines SCAR Data Policy (ISSN 1998-0337) when data. If you have any questions regarding this dataset, please contact us via information provided metadata or [email protected]. Issues can be reported biodiversity-aq GitHub project. We describe biodiversity TNB sampled installed Zucchelli". standardised, reproducible comparable method quantifying biodiversity. provides essential baseline abundance study area, representing an important understanding dynamics where these structures never been deployed and, general, exposure that largely exceed standard one, usually one year only.The occurrences here classified lowest possible taxonomic level comprise recognised species, families. Approximately 98% samples stored 96% ethanol, while others -20°C, resource future genetic studies. To date, entire collection has not DNA barcoded, although preliminary metabarcoding analyses already published Cecchetto et al. (2024). Outcomes barcoding activity will target another publication (Cometti al., prep). paper funded Belgian Science Office (BELSPO, contract n°FR/36/AN1/AntaBIS) framework EU-Lifewatch Portal (bio diversity.aq).

Язык: Английский

Процитировано

0
Assessment of Disinfection Efficiency of Chlorine and Bromine-Based Biocides for Marine Biofouling DOI Open Access

Susan N. James,

Alya Ahmed Alteneiji,

Ameera Badr Alteneiji

и другие.

Sustainability, Год журнала: 2025, Номер 17(10), С. 4262 - 4262

Опубликована: Май 8, 2025

Marine biofouling is a significant challenge for industries that rely on seawater. This study examined the effect of structural materials, carbon concentration, and salinity biofilm formation. Furthermore, it compares disinfection efficiency chlorine (NaClO) bromine (NaBr) biocides attempts to identify their optimal dosing. Among tested PVC exhibited highest microbial attachment (40%), followed by plastic (30%) concrete (23%). Biofilm growth increased with higher concentrations total organic (TOC), which depends upon seawater’s salinity. The simultaneous reduction TOC concentration further enhanced growth. A strong positive linear correlation (r = 0.98 p 0.003) was found between initial cell count seawater Disinfection experiments showed NaBr (97.36%) slightly more effective than NaClO (95.83%). Response Surface Methodology (RSM) identified conditions: 0.6 mg/L biocide 138 min dosing period. Generally, there are three strategies reducing growth: selecting appropriate controlling concentrations, or optimizing periods biocides.

Язык: Английский

Процитировано

0
Vertical microbial fluxes in a modern permanently redox‐stratified lake provide insights into organic carbon sequestration and benthic–pelagic coupling during the Proterozoic Eon DOI
Ashley B. Cohen, Vanja Klepac‐Ceraj, Kristen Bidas

и другие.

Limnology and Oceanography, Год журнала: 2025, Номер unknown

Опубликована: Май 27, 2025

Abstract Microbial processes regulating carbon cycling in ancient oceans remain poorly understood, yet characterizing these is critical for understanding early Earth biogeochemistry. Here, we investigate microbial communities associated with sinking particles meromictic Fayetteville Green Lake, a mid‐Proterozoic marginal ocean analog. The lake's photic zone spans oxic through sulfidic conditions, where prokaryotic photoautotrophs contribute to fluxes and organotrophs mediate remineralization across redox irradiance gradients. To characterize the flux over time condition, sequenced 16S rRNA amplicons recovered from sediment traps throughout water column course of an annual photoautotroph bloom. Purple sulfur bacteria dominated deep fluxes, while cyanobacteria green contributed variably depths but were more abundant suspended communities. As bloom waned, chemoautotrophic Epsilonbacteraeota gained dominance deeper possibly due niche partitioning. shallow was remineralized by microbes exposed temporally fluctuating biogeochemical conditions. Putative temporal changes availability quality organic matter terminal electron acceptors thus promoted succession low‐diversity few dominant hydrolytic acidogenic clades. Unchanging conditions at depth higher diversity niches specialists sulfur‐metabolizing fermentative These findings improve our offer insights into future shifts under climate change meromixis lakes.

Язык: Английский

Процитировано

0
Plastic Polymers and Antibiotic Resistance in an Antarctic Environment (Ross Sea): Are We Revealing the Tip of an Iceberg? DOI Creative Commons
Gabriella Caruso, Maurizio Azzaro, Ombretta Dell’Acqua

и другие.

Microorganisms, Год журнала: 2024, Номер 12(10), С. 2083 - 2083

Опубликована: Окт. 17, 2024

Microbial colonization of plastic polymers in Antarctic environments is an under-investigated issue. While several studies are documenting the spread pollution Ross Sea, whether formation a plastisphere (namely complex microbial assemblage colonizing plastics) may favor antibiotic-resistant bacteria (ARB) this marine environment unknown yet. A experiment was performed ecosystem, aiming at exploring potential role as reservoir antibiotic resistance. To end, biofilm-producing activity and susceptibility profiles bacterial strains isolated from biofilms submerged polyvinylchloride polyethylene panels were screened. The carried out two different sites namely Road Bay Tethys Bay. Most isolates able to produce biofilm; multidrug resistances detected members associated PVC PE (also named plastisphere), well surrounding water. lowest percentage ARB found PE-associated not-impacted (control) Punta Stocchino station, whereas highest one PVC-associated station. However, no selective enrichment relation study or either type material observed, suggesting that resistance antibiotics generalized widespread phenomenon. Resistance against all three classes assayed (i.e., cell wall antibiotics, nucleic acids, protein synthesis inhibitors) observed. high showing remote like ones, suffering increasing anthropic pressure, points emerging threat with pathogenic risk needs further deepening studies.

Язык: Английский

Процитировано

2