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Luz R, Cordeiro R, Gonçalves V, Vasconcelos V, Urbatzka R. Screening of Lipid-Reducing Activity and Cytotoxicity of the Exometabolome from Cyanobacteria. Mar Drugs 2024; 22:412. [PMID: 39330293 PMCID: PMC11433081 DOI: 10.3390/md22090412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2024] [Revised: 09/03/2024] [Accepted: 09/06/2024] [Indexed: 09/28/2024] Open
Abstract
Cyanobacteria are rich producers of secondary metabolites, excreting some of these to the culture media. However, the exometabolome of cyanobacteria has been poorly studied, and few studies have dwelled on its characterization and bioactivity assessment. In this work, exometabolomes of 56 cyanobacterial strains were characterized by HR-ESI-LC-MS/MS. Cytotoxicity was assessed on two carcinoma cell lines, HepG2 and HCT116, while the reduction in lipids was tested in zebrafish larvae and in a steatosis model with fatty acid-overloaded human liver cells. The exometabolome analysis using GNPS revealed many complex clusters of unique compounds in several strains, with no identifications in public databases. Three strains reduced viability in HCT116 cells, namely Tolypotrichaceae BACA0428 (30.45%), Aphanizomenonaceae BACA0025 (40.84%), and Microchaetaceae BACA0110 (46.61%). Lipid reduction in zebrafish larvae was only observed by exposure to Dulcicalothrix sp. BACA0344 (60%). The feature-based molecular network shows that this bioactivity was highly correlated with two flavanones, a compound class described in the literature to have lipid reduction activity. The exometabolome characterization of cyanobacteria strains revealed a high chemodiversity, which supports it as a source for novel bioactive compounds, despite most of the time being overlooked.
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Affiliation(s)
- Rúben Luz
- Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, BIOPOLIS Program in Genomics, Biodiversity and Land Planning; UNESCO Chair-Land Within Sea: Biodiversity & Sustainability in Atlantic Islands, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Rita Cordeiro
- Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, BIOPOLIS Program in Genomics, Biodiversity and Land Planning; UNESCO Chair-Land Within Sea: Biodiversity & Sustainability in Atlantic Islands, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Vítor Gonçalves
- Faculdade de Ciências e Tecnologia, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, BIOPOLIS Program in Genomics, Biodiversity and Land Planning; UNESCO Chair-Land Within Sea: Biodiversity & Sustainability in Atlantic Islands, Universidade dos Açores, 9500-321 Ponta Delgada, Portugal
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research-CIIMAR/CIMAR, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, 4069-007 Porto, Portugal
| | - Ralph Urbatzka
- Interdisciplinary Centre of Marine and Environmental Research-CIIMAR/CIMAR, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
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R P, M Basalingappa K, D SK, K R A, K GK, J S, Murugesan K, Radhakrishnan A, Kandaswamy D, Roy B, Thangaswamy S, Selvaraj B, R J, M M. Fluorescence capturing behaviour of cyanobacterial resilience: Insights into UV-exposed ecosystems and its environmental applications. LUMINESCENCE 2024; 39:e4898. [PMID: 39323008 DOI: 10.1002/bio.4898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2024] [Revised: 08/19/2024] [Accepted: 09/01/2024] [Indexed: 09/27/2024]
Abstract
Cyanobacteria are resilient microorganisms and thrive in environments exposed to UV radiation, ranging from ocean surfaces to scorching hot springs and dry expanses. 'Cyanobacterial Resilience' refers to their ability to withstand UV radiation, revealing intricate genomic secrets and adaptive mechanisms ensuring survival. These mechanisms include metabolic adaptations, robust DNA repair systems and UV-protective compounds such as Scytonemin and Mycosporine, vital for shielding against UV radiation survival. Cyanobacteria are crucial pioneers in UV-exposed ecosystems, highlighting their resilience and adaptability. Some cyanobacteria exhibit luminescence, emitting blue-green light due to phycobiliproteins, while bioluminescence in cyanobacteria, if it occurs, involves different compounds rather than luciferins and luciferase enzymes. This luminescence holds promise for various biotechnological applications, such as biosensors, imaging probes and carbon sequestration, for participating in photocatalytic processes for water purification and CO2 conversion, and contributes to solar simulation studies to advance photosynthesis and renewable energy technologies. The versatile applications of these materials highlight their ecological importance and potential in addressing global challenges. In conclusion, 'Cyanobacterial Resilience' highlights the remarkable adaptation strategies of cyanobacteria in UV-exposed environments. It emphasises their role as pioneers and innovators in biological and technological domains, providing insights into their enduring impact on ecosystems and scientific advancement.
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Affiliation(s)
- Prathima R
- Division of Molecular Biology, School of Life Sciences, Mysuru, India
| | | | - Sai Kavya D
- Department of Dermatology, Venereology and Leprosy, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Arjun K R
- Division of Molecular Biology, School of Life Sciences, Mysuru, India
| | - Girish Kanavi K
- Division of Molecular Biology, School of Life Sciences, Mysuru, India
| | - Suresh J
- Department of Pharmacognosy, JSS College of Pharmacy, Mysuru, India
| | - Karthikeyan Murugesan
- Department of Microbiology, Faculty of Medicine and Health Sciences, Quest International University, Perak, Malaysia
| | - Anjuna Radhakrishnan
- Department of Microbiology, Faculty of Medicine and Health Sciences, Quest International University, Perak, Malaysia
| | - Deepa Kandaswamy
- Department of Anatomy, Faculty of Medicine and Health Sciences, Quest International University, Perak, Malaysia
| | - Bedanta Roy
- Department of Physiology, Faculty of Medicine, Quest International University, Malaysia
| | - Selvankumar Thangaswamy
- Centre for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Bharath Selvaraj
- Centre for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Jaganathan R
- Centre for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Maghimaa M
- Centre for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
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Jusko BM, Johansen JR. Description of six new cyanobacterial species from soil biocrusts on San Nicolas Island, California, in three genera previously restricted to Brazil. JOURNAL OF PHYCOLOGY 2024; 60:133-151. [PMID: 38070138 DOI: 10.1111/jpy.13411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/12/2023] [Accepted: 11/13/2023] [Indexed: 02/17/2024]
Abstract
As the taxonomic knowledge of cyanobacteria from terrestrial environments increases, it remains important to analyze biodiversity in areas that have been understudied to fully understand global and endemic diversity. This study was completed as part of a larger algal biodiversity study of the soil biocrusts of San Nicholas Island, California, USA. Among the taxa isolated were several new species in three genera (Atlanticothrix, Pycnacronema, and Konicacronema) which were described from, and previously restricted to, Brazil. New taxa are described herein using a polyphasic approach to cyanobacterial taxonomy that considers morphological, molecular, ecological, and biogeographical factors. Morphological data corroborated by molecular analysis including sequencing of the 16S rRNA gene, and the associated 16S-23S ITS rRNA region was used to delineate three new species of Atlanticothrix, two species of Pycnacronema, and one species of Konicacronema. The overlap of genera from San Nicolas Island and Brazil suggests that cyanobacterial genera may be widely distributed across global hemispheres, whereas the presence of distinct lineages may indicate that this is not true at the species level. Our data suggest that based upon global wind patterns, cyanobacteria in both Northern and Southern hemispheres of the Americas may have a more recent common ancestor in Northern Africa, but this common ancestry is distant enough that speciation has occurred since transatlantic dispersal.
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Affiliation(s)
- Brian M Jusko
- Department of Biology, John Carroll University, University Heights, Ohio, USA
| | - Jeffrey R Johansen
- Department of Biology, John Carroll University, University Heights, Ohio, USA
- Department of Botany, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
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