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Ostadrahimi A, Ahmadikhatir S, Amirazad H, EivaziZiaei J, AsghariJafarabadi M, Barzeghari A, Esfahani A, Farrin N. Effect of combination of Beta Glucan and Lactobacillus rhamnosus HerizI on white blood cell counts and serum levels of IL-4 and IL-12 in women with breast cancer undergoing chemotherapy: A randomized double-blind placebo-controlled clinical trial. Clin Nutr ESPEN 2024; 61:281-287. [PMID: 38777445 DOI: 10.1016/j.clnesp.2024.03.035] [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: 02/01/2023] [Revised: 02/03/2024] [Accepted: 03/29/2024] [Indexed: 05/25/2024]
Abstract
BACKGROUND Aim of this study was the isolation of native probiotic and determine the effect of combination of Beta Glucan and Lactobacillus rhamnosus Heriz I on White Blood Cell Counts and serum levels of IL-4and IL-12 in breast cancer women receiving Chemotherapy. METHODS This study was randomized double-blind placebo-controlled clinical trial in 30 women with breast cancer. Women in the intervention group received two 10-mg capsules of soluble 1-3,1-6, D-beta glucan and one capsule of Lactobacillus rhamnosus strain Heriz I (2 × 107 CFU) daily and placebo group received placebo during 21days, interval between two courses of chemotherapy. White blood cells, neuthrophil, lymphocyte and monocyte counts, serum levels of IL-4 and IL-12 were measured before and after the study. RESULTS We isolated Lactobacillus rhamnosus Heriz I from conventional yogurt of Heriz region and registered in NCBI GeneBank. After administration, in both groups white blood cells counts decreased. At the end of study, serum level of IL-4 was decreased in combination group compared to placebo (P = 0.005). Also, serum level of IL-12 in combination group increased non-significantly (P = 0.066). CONCLUSION The findings suggest that combination of Beta Glucan and Lactobacillus rhamnosus Heriz I may be useful as immunomodulary supplements in chemotherapy patients however further studies were needed.
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Affiliation(s)
- Alireza Ostadrahimi
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Shonaz Ahmadikhatir
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Halimeh Amirazad
- Endocrine Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Jamal EivaziZiaei
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | | | - Abolfazl Barzeghari
- Pharmaceutical Nanotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Ali Esfahani
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Nazila Farrin
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran.
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Kumar KG, Husain R, Mishra A, Vikram N, Dwivedi DK, Pandey S, Singh A. Rice crop residue management by the microbial consortium for rapid decomposition of straw. 3 Biotech 2024; 14:137. [PMID: 38682095 PMCID: PMC11045711 DOI: 10.1007/s13205-024-03982-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/02/2024] [Indexed: 05/01/2024] Open
Abstract
Globally, more than 5 billion tons of crop residue (mainly rice straw) are produced yearly, and their management results in pollution, which kills microbes and limits soil nutrient recycling. Therefore, on-farm management that boosts degradation speed will improve the practicability of crop residue retention practices. The present study evaluated the 21 microbial isolates (Pseudomonas, Bacillus, Aspergillus, Trichoderma, Fusarium, and Rhizopus) from the soil of different agroclimatic zones obtained from rice fields for in situ straw degradation. The microbial diversity of these isolates was analyzed using 16 s rRNA and 18 s rRNA primers from various soil samples. The rice straw was used for degradation from isolated pathogens individually and in combination, and the results were analyzed using FTIR (Fourier transform infrared spectroscopy). The result suggested that the straw's degradation was the maximum with Trichoderma and Aspergillus, followed by the mixture of the isolates (Pseudomonas, Bacillus, Aspergillus, Trichoderma, Fusarium, and Rhizopus). Furthermore, SEM (scanning electron microscope) observed the degradation rate on different days of inoculation (7, 14, 28, 56, 70, and 100 DAI). The results showed that 90 DAI caused the highest degradation of rice straw. Therefore, Trichoderma containing microbial consortia could be used for vermicompost production from rice straw in field conditions, and it could increase crop productivity. Overall, our study added knowledge in rice straw management through a microbial consortium for better utilization in predominantly rice-growing countries. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-024-03982-z.
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Affiliation(s)
- Kunvar Gyanendra Kumar
- Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture and Technology, Ayodhya, Uttar Pradesh 224229 India
| | - Raja Husain
- Department of Agriculture, Himalayan University Itanagar, Itanagar, Arunachal Pradesh India
| | - Anurag Mishra
- Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture and Technology, Ayodhya, Uttar Pradesh 224229 India
- Department of Agricultural Biotechnology and Molecular Biology, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar 848125 India
| | - Nitin Vikram
- Department of Soil Science and Agriculture Chemistry, Uttar Pradesh, Zila Parishad Krishi Mahavidyalaya, Banda, 210001 India
| | - Devendra Kumar Dwivedi
- Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture and Technology, Ayodhya, Uttar Pradesh 224229 India
| | - Saurabh Pandey
- Department of Agriculture, Guru Nanak Dev University, Amritsar, Punjab 143005 India
| | - Ashutosh Singh
- Centre for Advance Studies On Climate Change, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar 848125 India
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Giannakopoulos C, Panou M, Gkelis S. Phylogenetic analysis of Nostocales (Cyanobacteria) based on two novel molecular markers, implicated in the nitrogenase biosynthesis. FEMS Microbiol Lett 2024; 371:fnad136. [PMID: 38168702 DOI: 10.1093/femsle/fnad136] [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: 09/16/2023] [Revised: 11/21/2023] [Accepted: 12/30/2023] [Indexed: 01/05/2024] Open
Abstract
The characterization of cyanobacteria communities remains challenging, as taxonomy of several cyanobacterial genera is still unresolved, especially within Nostocales taxa. Nostocales cyanobacteria are capable of nitrogen fixation; nitrogenase genes are grouped into operons and are located in the same genetic locus. Structural nitrogenase genes (nifH, nifK and nifD) as well as 16S rRNA have been shown to be adequate genetic markers for distinguishing cyanobacterial genera. However, there is no available information regarding the phylogeny of regulatory genes of the nitrogenase cluster. Aiming to provide a more accurate overview of the evolution of nitrogen fixation, this study analyzed for the first time nifE and nifN genes, which regulate the production of nitrogenase, alongside nifH. Specific primers were designed to amplify nifE and nifN genes, previously not available in literature and phylogenetic analysis was carried out in 13 and 14 TAU-MAC culture collection strains, respectively, of ten Nostocales genera along with other sequences retrieved from cyanobacteria genomes. Phylogenetic analysis showed that these genes seem to follow a common evolutionary pattern with nitrogenase structural genes and 16S rRNA. The classification of cyanobacteria based on these molecular markers seems to distinguish Nostocales strains with common morphological, ecological, and physiological characteristics.
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Affiliation(s)
- Christos Giannakopoulos
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
| | - Manthos Panou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
| | - Spyros Gkelis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
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Pourmollaei S, Farshbaf-Khalili A, Barzegari A, Bastani S, Babaie S, Fattahi A, Shahnazi M. Anticancer Effect of Enterococcus faecium, Isolated from Vaginal Fluid, on Ovarian Cancer Cells. IRANIAN BIOMEDICAL JOURNAL 2023; 27:205-13. [PMID: 37525437 PMCID: PMC10507285 DOI: 10.61186/ibj.3846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 05/31/2023] [Indexed: 12/17/2023]
Abstract
Background Given the association between cervicovaginal microbiota and OVC, we investigated the effect of Enterococcus faecium conditioned medium (CM) on OVC (Caov-4) cells. Methods CM was obtained from the bacterium E. faecium isolated from the vagina of healthy women. The Caov-4 cells were treated with varying concentrations of CM that comprised co-cultured bacteria with 0.2, 0.5, 1, 1.5, and 2 OD for 12, 24, and 48 h. The apoptosis and growth of cancer cells were evaluated by 4′,6-diamidino-2-phenylindole (DAPI) staining, flow cytometry, and DNA laddering assay. Moreover, the expression of PTEN, BAX, BCL2, and AKT1 genes were analyzed using real-time PCR. Results The CM at a concentration of 0.5 OD from the cultured bacteria and incubation time of 48 h showed the highest negative effect on the viability of cancer cells. The CM treatment increased DNA fragmentation and also induced apoptosis in Caov-4 cells. Interestingly, CM could decrease the expression of proapoptotic genes were less, while antiapoptotic genes were more than fluorouracil in the presence of CM. Conclusion CM of human-derived E. faecium could have an anticancer effect on OVC cells in a concentration- and time-dependent manner. This study demonstrated that E. faecium secretes anticancer substances into the CM, which could directly affect the viability and apoptosis of cancer cells.
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Affiliation(s)
- Soraya Pourmollaei
- Department of Midwifery, Faculty of Nursing and Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran
- Students' Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Azizeh Farshbaf-Khalili
- Aging Research Institute, Physical Medicine, and Rehabilitation Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegari
- Research Center of Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sepideh Bastani
- Research Center of Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Soraya Babaie
- Aging Research Institute, Physical Medicine, and Rehabilitation Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Fattahi
- Womenʼs Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahnaz Shahnazi
- Department of Midwifery, Faculty of Nursing and Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran
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Uncovering New Diversity of Photosynthetic Microorganisms from the Mediterranean Region. Microorganisms 2022; 10:microorganisms10081571. [PMID: 36013989 PMCID: PMC9416340 DOI: 10.3390/microorganisms10081571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 07/29/2022] [Accepted: 08/01/2022] [Indexed: 12/04/2022] Open
Abstract
In the large and morphologically diverse phylum of Chlorophyta, new taxa are discovered every year and their phylogenetic relationships are reconstructed by the incorporation of molecular phylogenetic methods into traditional taxonomy. Herein, we aim to contribute to the photosynthetic microorganisms’ diversity knowledge in the Mediterranean area, a relatively unexplored ecoregion with high diversity. Based on a polyphasic approach, 18 Chlorophyta isolates were investigated and characterized. Morphological characteristics and ultrastructure, the phylogeny based on 18S rRNA gene (small subunit ribosomal RNA), 18S–28S internal transcribed spacer (ITS region), and the ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit region (rbcL gene), support establishing four new genera (Nomia, Ava, Akraea, Lilaea) and five new species (Spongiosarcinopsis limneus, N. picochloropsia, Av. limnothalassea, Ak. chliaropsychia, and L. pamvotia) belonging to orders Sphaeropleales, Chlorellales, and Chlamydomonadales. For some of them, this is the first report of their occurrence in specific aquatic environments.
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Exploiting Rhizobium for Cadmium Sulphide Nanoparticle Synthesis: Heterologous Expression of an Escherichia coli DH10B Enzyme, YbdK [EC: 6.3.2.2] in Sinorhizobium fredii NGR234. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.1.59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Escherichia coli DH10B has 1.1 kb ybdK gene which is responsible for encoding YbdK enzyme that possess a Gamma glutamyl cysteine synthetase activity. ybdK gene was ligated downstream of a constitutive derepressed lac promoter of a low copy number plasmid vector pBBR1MCS-2, giving rise to a recombinant plasmid pPAT. Sinorhizobium fredii NGR234 transformed with pPAT showed an augmented production of glutathione which in turn increased the production of cadmium sulphide nanoparticles to some extent. Also, a heterologous expression of YbdK in Sinorhizobium fredii NGR234 improved the oxidation status of bacterial cells which is confirmed by fluorescence microscopy images and fluorometry. Genetically modified (GM) cells stained by DCFDA showed a significant decrease in fluorescence compared to wild type (WT) cells. Physical and chemical properties of the nanoparticles produced by the pPAT transformed Sinorhizobium fredii NGR234 differed significantly compared to wild type (WT) Sinorhizobium fredii NGR234. Comparative analysis of the nanoparticles by FTIR and SEM analysis revealed the functional groups attached to nanoparticles and average nanoparticle size respectively. Nanoparticles synthesized by genetically modified (GM) bacteria were about 3 times smaller in size compared to those produced by wild type (WT) rhizobium. FTIR analysis revealed an augmented presence of peptide with the nanoparticles produced by GM bacteria compared to those produced by the WT bacteria. XRD data revealed that biosynthesized CdS nanoparticles are face centered crystalline particles which was confirmed by comparing the peaks to standard JCPDS data (JCPDS card no. 10-454).
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Kishor R, Purchase D, Saratale GD, Ferreira LFR, Bilal M, Iqbal HM, Bharagava RN. Environment friendly degradation and detoxification of Congo red dye and textile industry wastewater by a newly isolated Bacillus cohnni (RKS9). ENVIRONMENTAL TECHNOLOGY & INNOVATION 2021. [DOI: 10.1016/j.eti.2021.101425] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Abstract
The absence of acquired resistance to antimicrobials has become an important criterion in evaluation of the biosafety of lactobacilli used as industrial starter or probiotic cultures. The aim of this study was to assess antibiotic resistance in starter and non-starter lactobacilli of food origin. Minimal inhibitory concentrations of ampicillin, chloramphenicol, clindamycin, erythromycin, gentamicin, kanamycin, streptomycin, tetracycline and vancomycin were established in 81 strains of lactobacilli (L. acidophilus, L. animalis, L. brevis, L. curvatus, L. delbrueckii, L. fermentum, L. helveticus, L. paracasei, L. plantarum, L. rhamnosus and L. sakei) by the microdilution method. The strains were classified as susceptible or resistant to antimicrobials based on the cut-off values according to the EFSA guideline. Sixty-two strains (77% food isolates, 76% starter or adjunct cultures) were resistant to at least one antimicrobial agent (the most frequently to aminoglycosides). Adjunct cultures showed a higher antibiotic resistance (80%) than starters (60%). Four multiresistant strains (3 food isolates, 1 adjunct culture) were analyzed by whole genome sequencing. One potentially transferable aadE gene (responsible for streptomycin resistance) was detected only in one multi-drug resistant strain of L. animalis originating from an adjunct culture. Thus, there is a risk of horizontal transmission of this gene. It is necessary to eliminate such strains from use in the food industry. This study provides relevant data concerning the use of lactobacilli in safe food production. To ensure food safety, detailed characterization of resistance to antimicrobials is necessary not only in starter strains but also in non-starter lactic acid bacteria isolated from food products.
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Development of a genomic DNA reference material for Salmonella enteritidis detection using polymerase chain reaction. Mol Cell Probes 2020; 55:101690. [PMID: 33345976 DOI: 10.1016/j.mcp.2020.101690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 11/28/2020] [Accepted: 12/11/2020] [Indexed: 01/18/2023]
Abstract
Several rapid methods based on nucleic acids can detect foodborne pathogens, such as Salmonella spp. However, a common reference that enables metrological traceability among measurement results is not available. Reference materials (RM) are thus key to guarantee methodological comparability. This study developed a candidate genomic DNA reference material for Salmonella enteritidis quantification to establish performance conditions and reference values for normalized RM production. The growth of Salmonella enteritidis ATCC® 13076 in Rappaport Vassiliadis selective medium was characterized, and we optimized a method of DNA extraction using cetrimonium bromide (CTAB) and LiCl. In a first stage six concentrations of DNA were prepared with and without yeast RNA (40 ng/μL) to evaluate its effect as a stabilizer in terms of homogeneity and short-term stability. Based on the findings, in a second stage two DNA concentrations were prepared and a reference value with its uncertainty was assigned based on the results of characterization, homogeneity, and stability studies using digital polymerase chain reaction and the gene targets, invA, ttr, and hilA. The material was stable for 9 months at 4 °C, with a expanded uncertainty contribution range of 11%-14%. The novel candidate RM is the first to be developed nationwide and will improve the quality of measurements in the area of food safety.
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Konstantinou D, Kakakiou RV, Panteris E, Voultsiadou E, Gkelis S. Photosynthetic Sponge-associated Eukaryotes in the Aegean Sea: A Culture-dependent Approach. J Eukaryot Microbiol 2020; 67:660-670. [PMID: 32682339 DOI: 10.1111/jeu.12818] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/04/2020] [Accepted: 07/10/2020] [Indexed: 12/31/2022]
Abstract
Symbioses between sponges and photosynthetic organisms are very diverse regarding the taxonomy and biogeography of both hosts and symbionts; to date, most research has focused on the exploration of bacterial diversity. The present study aims to characterize the culturable diversity of photosynthetic eukaryotes associated with sponges in the Aegean Sea, on which no information exists. Five microalgae strains were isolated from marine sponges; the strains were characterized by morphological features, and the 18S rRNA, 18S-28S Internal Transcribed Spacer, and ribulose-bisphosphate carboxylase large chain (rbcL) sequences. Our polyphasic approach showed that the strains belonged to the green-alga Acrochaete leptochaete, the diatom Nanofrustulum cf. shiloi, the rhodophyte Acrochaetium spongicola, and the chlorachniophyte Lotharella oceanica. A. leptochaete is reported for the first time in sponges, even though green algae are known to be associated with sponges. Nanofrustulum shiloi was found in association with the sponges Agelas oroides and Chondrilla nucula, whereas information existed only for its association with the species Aplysina aerophoba. Acrochaetium spongicola was found for the first time in association with sponges in the eastern Mediterranean. Moreover, we report herein for the first time a sponge-chlorarachniophycean association. Our research revealed new diversity of microalgae associated with sponges and added new records of sponge species, previously unknown for their association with microalgae.
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Affiliation(s)
- Despoina Konstantinou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece.,Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
| | - Rafaela V Kakakiou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
| | - Emmanuel Panteris
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
| | - Eleni Voultsiadou
- Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
| | - Spyros Gkelis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
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Konstantinou D, Voultsiadou E, Panteris E, Gkelis S. Revealing new sponge-associated cyanobacterial diversity: Novel genera and species. Mol Phylogenet Evol 2020; 155:106991. [PMID: 33098986 DOI: 10.1016/j.ympev.2020.106991] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 10/09/2020] [Accepted: 10/14/2020] [Indexed: 11/16/2022]
Abstract
Cyanobacteria are often reported as abundant components of the sponge microbiome; however their diversity below the phylum level is still underestimated. Aiming to broaden our knowledge of sponge-cyanobacteria association, we isolated cyanobacterial strains from Aegean Sea sponges in previous research, which revealed high degree of novel cyanobacterial diversity. Herein, we aim to further characterize sponge-associated cyanobacteria and re-evaluate their classification based on an extensive polyphasic approach, i.e. a combination of molecular, morphological and ecological data. This approach resulted in the description of five new genera (Rhodoploca, Cymatolege, Metis, Aegeococcus, and Thalassoporum) and seven new species (R. sivonenia, C. spiroidea, C. isodiametrica, M. fasciculata, A. anagnostidisi, A. thureti, T. komareki) inside the order Synechococcales, and a new pleurocapsalean species (Xenococcus spongiosum). X. spongiosum is a baeocyte-producing species that shares some morphological features with other Xenococcus species, but has distinct phylogenetic and ecological identity. Rhodoploca, Cymatolege, Metis and Thalassoporum are novel well supported linages of filamentous cyanobacteria that possess distinct characters compared to their sister taxa. Aegeococcus is a novel monophyletic linage of Synechococcus-like cyanobacteria exhibiting a unique ecology, as sponge-dweller. The considerable number of novel taxa characterized in this study highlights the importance of employing polyphasic culture-dependent approaches in order to reveal the true cyanobacterial diversity associated with sponges.
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Affiliation(s)
- Despoina Konstantinou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki GR-541 24, Greece; Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki GR-541 124, Greece
| | - Eleni Voultsiadou
- Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki GR-541 124, Greece
| | - Emmanuel Panteris
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki GR-541 24, Greece
| | - Spyros Gkelis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki GR-541 24, Greece.
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Villamil C, Calderon MN, Arias MM, Leguizamon JE. Validation of Droplet Digital Polymerase Chain Reaction for Salmonella spp. Quantification. Front Microbiol 2020; 11:1512. [PMID: 32733415 PMCID: PMC7358645 DOI: 10.3389/fmicb.2020.01512] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/10/2020] [Indexed: 01/08/2023] Open
Abstract
Salmonellosis is a foodborne disease caused by Salmonella spp. Although cell culture is the gold standard for its identification, validated molecular methods are becoming an alternative, because of their rapidity, selectivity, and specificity. A simplex and duplex droplet digital polymerase chain reaction (ddPCR)-based method for the identification and quantification of Salmonella using ttr, invA, hilA, spaQ, and siiA gene sequences was validated. The method has high specificity, working interval between 8 and 8,000 cp/μL in ddPCR reaction, a limit of detection of 0.5 copies/μL, and precision ranging between 5 and 10% measured as a repeatability standard deviation. The relative standard measurement uncertainty was between 2 and 12%. This tool will improve food safety in national consumption products and will increase the competitiveness in agricultural product trade.
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Affiliation(s)
- Carolina Villamil
- Departamento de Química, Universidad Nacional de Colombia, Bogota, Colombia
| | | | - Maria Mercedes Arias
- Grupo de Metrología en Bioanálisis, Instituto Nacional de Metrología, Bogota, Colombia
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Konstantinou D, Mavrogonatou E, Zervou SK, Giannogonas P, Gkelis S. Bioprospecting Sponge-Associated Marine Cyanobacteria to Produce Bioactive Compounds. Toxins (Basel) 2020; 12:toxins12020073. [PMID: 31979262 PMCID: PMC7076795 DOI: 10.3390/toxins12020073] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 12/23/2022] Open
Abstract
Marine cyanobacteria are considered a prolific source of bioactive natural products with a range of biotechnological and pharmacological applications. However, data on the production of natural compounds from sponge-associated cyanobacteria are scarce. This study aimed to assess the potential of sponge-associated cyanobacteria strains representing different taxonomic groups for the production of bioactive compounds and the biological activity of their extracts. Phylogenetic analysis of sponge-associated cyanobacteria and screening for the presence of genes encoding non-ribosomal peptide synthetases (NRPSs) and polyketide synthases (PKSs) were performed. Methanol extracts of the sponge-associated strains were analyzed for cyanotoxin production and tested for antioxidant activity and cytotoxic activity against several human cancer cell lines and pathogenic bacteria. PKS were detected in all sponge-associated strains examined, indicating the metabolic potential of the isolates. PKS genes were more ubiquitous than NRPS genes. Cyanotoxins (i.e., cylindrospermopsin, anatoxin-a, nodularin, and microcystins) were not detected in any of the sponge-associated cyanobacterial strains. Strains belonging to Leptothoe, Pseudanabaena, and Synechococcus were found to have activity mainly against Staphylococcus aureus. In addition, sponge-associated Leptothoe strains (TAU-MAC 0915, 1015, 1115, and 1215) were found to be highly cytotoxic and in most cases more effective against human cancer cell lines than against normal cells. Extracts with the most promising bioactivity deserve further investigation in order to isolate and identify the bioactive molecule(s).
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Affiliation(s)
- Despoina Konstantinou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (D.K.); (E.M.); (S.-K.Z.); (P.G.)
| | - Eleni Mavrogonatou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (D.K.); (E.M.); (S.-K.Z.); (P.G.)
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research “Demokritos”, Patriarchou Grigoriou & Neapoleos, Agia Paraskevi, 15341 Athens, Greece
| | - Sevasti-Kiriaki Zervou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (D.K.); (E.M.); (S.-K.Z.); (P.G.)
- Laboratory of Photo-Catalytic Processes and Environmental Chemistry, Institute of Nanoscience & Nanotechnology, National Centre for Scientific Research “Demokritos”, Patriarchou Grigoriou & Neapoleos, Agia Paraskevi, 15341 Athens, Greece
| | - Panagiotis Giannogonas
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (D.K.); (E.M.); (S.-K.Z.); (P.G.)
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research “Demokritos”, Patriarchou Grigoriou & Neapoleos, Agia Paraskevi, 15341 Athens, Greece
| | - Spyros Gkelis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (D.K.); (E.M.); (S.-K.Z.); (P.G.)
- Correspondence: ; Tel.: +30-231-099-8083
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Detection of pathogenic bacteria via nanomaterials-modified aptasensors. Biosens Bioelectron 2019; 150:111933. [PMID: 31818764 DOI: 10.1016/j.bios.2019.111933] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/13/2019] [Accepted: 11/26/2019] [Indexed: 01/17/2023]
Abstract
Detection and identification of special cells via aptamer-based nano-conjugates sensors have been revolutionized over the past few years. These sensing platforms rely on selecting aptamers using systematic evolution of ligands by exponential enrichment (SELEX) in vitro, which allows for sensitive detection of cells. Integration of the aptamer-based sensors (aptasensors) with nanomaterials offers enhanced specificity and sensitivity, which in turn, offers great promise for numerous applications, spanning from bioanalysis to biomedical applications. Accordingly, the demand for using aptamer-conjugated nanomaterials for various applications has progressively increased over the past years. In light of this, this Review seeks to highlight the recent advances in the development of aptamer-conjugated nanomaterials and their utilization for the detection of various pathogens involved in infectious diseases and food contamination.
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Lortou U, Gkelis S. Polyphasic taxonomy of green algae strains isolated from Mediterranean freshwaters. ACTA ACUST UNITED AC 2019; 26:11. [PMID: 31696064 PMCID: PMC6822476 DOI: 10.1186/s40709-019-0105-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 10/18/2019] [Indexed: 11/30/2022]
Abstract
Background Terrestrial, freshwater and marine green algae constitute the large and morphologically diverse phylum of Chlorophyta, which gave rise to the core chlorophytes. Chlorophyta are abundant and diverse in freshwater environments where sometimes they form nuisance blooms under eutrophication conditions. The phylogenetic relationships among core chlorophyte clades (Chlorodendrophyceae, Ulvophyceae, Trebouxiophyceae and Chlorophyceae), are of particular interest as it is a species-rich phylum with ecological importance worldwide, but are still poorly understood. In the Mediterranean ecoregion, data on molecular characterization of eukaryotic microalgae strains are limited and current knowledge is based on ecological studies of natural populations. In the present study we report the isolation and characterization of 11 green microalgae strains from Greece contributing more information for the taxonomy of Chlorophyta. The study combined morphological and molecular data. Results Phylogenetic analysis based on 18S rRNA, internal transcribed spacer (ITS) region and the large subunit of the ribulose-bisphosphate carboxylase (rbcL) gene revealed eight taxa. Eleven green algae strains were classified in four orders (Sphaeropleales, Chlorellales, Chlamydomonadales and Chaetophorales) and were represented by four genera; one strain was not assigned to any genus. Most strains (six) were classified to the genus Desmodesmus, two strains to genus Chlorella, one to genus Spongiosarcinopsis and one filamentous strain to genus Uronema. One strain is placed in a separate independent branch within the Chlamydomonadales and deserves further research. Conclusions Our study reports, for the first time, the presence of Uronema in an aquatic environment up to 40 °C and reveals new diversity within the Chlamydomonadales. The results from the ITS region and the rbcL gene corroborated those obtained from 18S rRNA without providing further information or resolving the phylogenetic relationships within certain genera, due to the limited number of ITS and rbcL sequences available. The comparison of molecular and morphological data showed that they were congruent. Cosmopolitan genera with high worldwide distribution inhabit Greek freshwaters.
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Affiliation(s)
- Urania Lortou
- Department of Botany, Aristotle University of Thessaloniki, P.O. Box 109, 541 24 Thessaloniki, Greece
| | - Spyros Gkelis
- Department of Botany, Aristotle University of Thessaloniki, P.O. Box 109, 541 24 Thessaloniki, Greece
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Konstantinou D, Voultsiadou E, Panteris E, Zervou SK, Hiskia A, Gkelis S. Leptothoe, a new genus of marine cyanobacteria (Synechococcales) and three new species associated with sponges from the Aegean Sea. JOURNAL OF PHYCOLOGY 2019; 55:882-897. [PMID: 31001838 DOI: 10.1111/jpy.12866] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Cyanobacterial diversity associated with sponges remains underestimated, though it is of great scientific interest in order to understand the ecology and evolutionary history of the symbiotic relationships between the two groups. Of the filamentous cyanobacteria, the genus Leptolyngbya is the most frequently found in association with sponges as well as the largest and obviously polyphyletic group. In this study, five Leptolyngbya-like sponge-associated isolates were investigated using a combination of molecular, chemical, and morphological approach and revealed a novel marine genus herein designated Leptothoe gen. nov. In addition, three new species of Leptothoe, Le. sithoniana, Le. kymatousa, and Le. spongobia, are described based on a suite of distinct characters compared to other marine Leptolyngbyaceae species/strains. The three new species, hosted by four sponge species, showed different degrees of host specificity. Leptothoe sithoniana and Le. kymatousa hosted by the sponges Petrosia ficiformis and Chondrilla nucula, respectively, seem to be more specialized than Le. spongobia, which was hosted by the sponges Dysidea avara and Acanthella acuta. All three species contained nitrogen-fixing genes and may contribute to the nitrogen budget of sponges. Leptothoe spongobia TAU-MAC 1115 isolated from Acanthella acuta was shown to produce microcystin-RR indicating that microcystin production among marine cyanobacteria could be more widespread than previously determined.
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Affiliation(s)
- Despoina Konstantinou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, GR-541 24, Greece
- Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, GR-541 124, Greece
| | - Eleni Voultsiadou
- Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, GR-541 124, Greece
| | - Emmanuel Panteris
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, GR-541 24, Greece
| | - Sevasti-Kiriaki Zervou
- Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", Athens, GR-153 10, Greece
| | - Anastasia Hiskia
- Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", Athens, GR-153 10, Greece
| | - Spyros Gkelis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, GR-541 24, Greece
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NEHRU DAWOUDAAMIR, DHALIWAL GS, JAN MH, CHEEMA RS, KUMAR SANJAY. A non-invasive diagnostic test for subclinical endometritis in buffaloes. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2019. [DOI: 10.56093/ijans.v89i2.87325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This study was conducted to evaluate the potential of uterine lavage sample optical density (ULSOD) test at the time of insemination for diagnosis of subclinical endometritis (SCE). Buffaloes (86) at the time of estrus having >5% polymorphonuclear (PMN) cells in endometrial cytosmears were designated as positive (21) and buffaloes with ≤5% PMN cell as negative (65) for SCE. Presence of E. coli, A. pyogenes and F. necrophorum in the uterus was detected based upon PCR amplification of genes related to bacteria specific virulence factors (fimH, fimA and lktA genes, respectively). Pathogenic bacteria were isolated from 76.2% buffaloes with SCE as compared to 39.4% buffaloes without SCE. E. coli (fimH) and F. necrophorum (lktA) represented the major bacteriological risk factor for occurrence of SCE. The optical density of uterine lavage was measured at 352, 500, 620, 790 and 960 nm wavelengths. ULSOD620 was selected as reference wavelength because it presented the greatest area under curve (0.80). The recommended threshold for the receiver operator curve was 0.029 with a sensitivity and specificity of 85.7 and 73.8%, respectively. In the current study, the level of agreement (kappa) of ULSOD620 with cytobrush cytology was moderate (0.49) and the diagnostic accuracy was good (76.7%). Buffaloes with ≤0.029 ULSOD620 at the time of estrus had significantly lower conception rate at corresponding AI as compared to buffaloes with ≤0.029 ULSOD620. It is suggested that ULSOD620 measurement could be used as alternative to endometrial cytology and can be a tool to predict the outcome of artificial insemination in buffaloes.
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Panou M, Zervou SK, Kaloudis T, Hiskia A, Gkelis S. A Greek Cylindrospermopsis raciborskii strain: Missing link in tropic invader's phylogeography tale. HARMFUL ALGAE 2018; 80:96-106. [PMID: 30502817 DOI: 10.1016/j.hal.2018.10.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 10/02/2018] [Accepted: 10/07/2018] [Indexed: 06/09/2023]
Abstract
The cyanobacterium Cylindrospermopsis raciborskii represents a challenge for researchers and it is extensively studied for its toxicity and invasive behaviour, which is presumably enhanced by global warming. Biogeography studies indicate a tropical origin for this species, with Greece considered as the expansion route of C. raciborskii in Europe. The widening of its geographic distribution and the isolation of strains showing high optimum growth temperature underline its ecological heterogeneity, suggesting the existence of different ecotypes. The dominance of species like C. raciborskii along with their ecotoxicology and potential human risk related problems, render the establishment of a clear phylogeography model essential. In the context of the present study, the characterization of Cylindrospermopsis raciborskii TAU-MAC 1414 strain, isolated from Lake Karla, with respect to its phylogeography and toxic potential, is attempted. Our research provides new insights on the origin of C. raciborskii in the Mediterranean region; C. raciborskii expanded in Mediterranean from North America, whilst the rest of the European strains may originate from Asia and Australia. Microcystin synthetase genes, phylogenetic closely related with Microcystis strains, were also present in C. raciborskii TAU-MAC 1414. We were unable to unambiguously confirm the presence of MC-LR, using LC-MS/MS. Our results are shedding light on the expansion and distribution of C. raciborskii, whilst they pose further questions on the toxic capacity of this species.
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Affiliation(s)
- Manthos Panou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
| | - Sevasti-Kiriaki Zervou
- Laboratory of Catalytic-Photocatalytic Processes and Environmental Analysis, Institute of Nanoscience & Nanotechnology, National Center for Scientific Research "Demokritos", Patriarchou Grigoriou & Neapoleos, 15310 Agia Paraskevi, Athens, Greece
| | - Triantafyllos Kaloudis
- Water Quality Department, Athens Water Supply and Sewerage Company (EYDAP SA), 156 Oropou Str., 11146 Athens, Greece
| | - Anastasia Hiskia
- Laboratory of Catalytic-Photocatalytic Processes and Environmental Analysis, Institute of Nanoscience & Nanotechnology, National Center for Scientific Research "Demokritos", Patriarchou Grigoriou & Neapoleos, 15310 Agia Paraskevi, Athens, Greece
| | - Spyros Gkelis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
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Nehru DA, Dhaliwal GS, Jan MH, Cheema RS, Kumar S. Clinical efficacy of intrauterine cephapirin benzathine administration on clearance of uterine bacteria and subclinical endometritis in postpartum buffaloes. Reprod Domest Anim 2018; 54:317-324. [DOI: 10.1111/rda.13362] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 10/09/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Dawoud A. Nehru
- Guru Angad Dev veterinary and Animal Sciences University; Ludhiana Punjab India
| | | | - Mustafa. H. Jan
- ICAR-Central Institute for Research on Buffaloes, sub-Campus Nabha; Patiala Punjab India
| | - Ranjna S. Cheema
- Guru Angad Dev veterinary and Animal Sciences University; Ludhiana Punjab India
| | - Sanjay Kumar
- ICAR-Central Institute for Research on Buffaloes, sub-Campus Nabha; Patiala Punjab India
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20
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Maleki Kakelar H, Barzegari A, Hanifian S, Barar J, Omidi Y. Isolation and molecular identification of Lactobacillus with probiotic potential from abomasums driven rennet. Food Chem 2018; 272:709-714. [PMID: 30309602 DOI: 10.1016/j.foodchem.2018.08.081] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 08/19/2018] [Accepted: 08/19/2018] [Indexed: 11/28/2022]
Abstract
Lactobacillus species are beneficial for the functional food industry and preventive medicine. The complex microflora of traditional cheese depends on the cheese types (e.g., homemade rennets). Here, the abomasum driven rennet was assessed for the existence of lactobacilli. For differentiating lactobacilli, the bacterial suspension was screened for the acid and bile resistance. The isolated bacteria were evaluated for antibiotic susceptibility and antagonistic impacts on other pathogenic bacteria. The 16S rDNA gene was evaluated by the amplified ribosomal DNA restriction analysis (ARDRA) recruiting the restriction enzyme Taq I and compared to the virtually digested patterns of previous reports on lactobacilli. The isolates were examined by random amplified polymorphic DNA (RAPD) and distinctive lactobacilli were sequenced. ARDRA and RAPD data showed three distinct lactobacilli strains, including L. acidophilus, L. planetarum, and L. fermentum. The homemade rennet is proposed as the novel source of probiotic strains as an alternative to the traditional cheeses.
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Affiliation(s)
- Hadi Maleki Kakelar
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegari
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shahram Hanifian
- Department of Food Science and Technology, Faculty of Agriculture Science, Tabriz Branch, Islamic Azad University, Tabriz, Iran
| | - Jaleh Barar
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yadollah Omidi
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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Mehbub MF, Tanner JE, Barnett SJ, Bekker J, Franco CMM, Zhang W. A controlled aquarium system and approach to study the role of sponge-bacteria interactions using Aplysilla rosea and Vibrio natriegens. Sci Rep 2018; 8:11801. [PMID: 30087404 PMCID: PMC6081443 DOI: 10.1038/s41598-018-30295-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 07/23/2018] [Indexed: 11/09/2022] Open
Abstract
Sponge-bacteria interactions are very important due to their ecological and biological significance. To understand the impact of interactions between sponges and bacteria (both associated with and external to sponges) on sponge-associated microbial diversity, sponge metabolite profiles and bioactivity, we used a controlled aquarium system and designed an experimental approach that allows the study of sponge-bacteria interactions in a well-defined manner. To test the feasibility of this approach, this system was used to study the interaction between a sponge Aplysilla rosea and a marine bacterium commonly found in seawater, Vibrio natriegens. Sponge explants were exposed to V. natriegens, at 5 × 106 cfu/ml, and changes were monitored for 48 hours. Pyro-sequencing revealed significant shifts in microbial communities associated with the sponges after 24 to 48 hours. Both the control (sponge only without added bacteria) and Vibrio-exposed sponges showed a distinct shift in bacterial diversity and abundance with time. Vibrio exposure significantly increased bacterial diversity, the abundance of a number of taxa compared to control sponges. The result experimentally supports the notion of dynamic and concerted responses by the sponge when interacting with a bacterium, and demonstrates the feasibility of using this controlled aquarium system for the study of sponge-bacteria interactions.
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Affiliation(s)
- Mohammad F Mehbub
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
| | - Jason E Tanner
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
- SARDI Aquatic Sciences, 2 Hamra Avenue, West Beach, SA, 5024, Adelaide, Australia
| | - Stephen J Barnett
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
| | - Jan Bekker
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia
| | - Christopher M M Franco
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
| | - Wei Zhang
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Adelaide, Australia.
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Sponges-Cyanobacteria associations: Global diversity overview and new data from the Eastern Mediterranean. PLoS One 2018; 13:e0195001. [PMID: 29596453 PMCID: PMC5875796 DOI: 10.1371/journal.pone.0195001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 03/14/2018] [Indexed: 11/19/2022] Open
Abstract
Sponge-cyanobacteria associations have attracted research interest from an ecological, evolutionary and biotechnological perspective. Current knowledge is, in its majority, “hidden” in metagenomics research studying the entire microbial communities of sponges, while knowledge on these associations is totally missing for certain geographic areas. In this study, we (a) investigated the occurrence of cyanobacteria in 18 sponge species, several of which are studied for the first time for their cyanobionts, from a previously unexplored eastern Mediterranean ecoregion, the Aegean Sea, (b) isolated sponge-associated cyanobacteria, and characterized them based on a polyphasic (morphological-morphometric and molecular phylogenetic analysis) approach, and (c) conducted a meta-analysis on the global diversity of sponge species hosting cyanobacteria, as well as the diversity of cyanobacterial symbionts. Our research provided new records for nine sponge species, previously unknown for this association, while the isolated cyanobacteria were found to form novel clades within Synechococcus, Leptolyngbyaceae, Pseudanabaenaceae, and Schizotrichaceae, whose taxonomic status requires further investigation; this is the first report of a Schizotrichaceae cyanobacterium associated with sponges. The extensive evaluation of the literature along with the new data from the Aegean Sea raised the number of sponge species known for hosting cyanobacteria to 320 and showed that the cyanobacterial diversity reported from sponges is yet underestimated.
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Charmi far B, Mahdavi S. Frequency of Adherence Genes cna, fnbA and fnbB in Staphylococcus aureus Isolates from Traditional Cheese. MEDICAL LABORATORY JOURNAL 2017. [DOI: 10.29252/mlj.11.5.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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The role of sponge-bacteria interactions: the sponge Aplysilla rosea challenged by its associated bacterium Streptomyces ACT-52A in a controlled aquarium system. Appl Microbiol Biotechnol 2016; 100:10609-10626. [PMID: 27717966 DOI: 10.1007/s00253-016-7878-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 09/05/2016] [Accepted: 09/16/2016] [Indexed: 10/20/2022]
Abstract
Sponge-associated bacteria play a critical role in sponge biology, metabolism and ecology, but how they interact with their host sponges and the role of these interactions are poorly understood. This study investigated the role of the interaction between the sponge Aplysilla rosea and its associated actinobacterium, Streptomyces ACT-52A, in modifying sponge microbial diversity, metabolite profile and bioactivity. A recently developed experimental approach that exposes sponges to bacteria of interest in a controlled aquarium system was improved by including the capture and analysis of secreted metabolites by the addition of an absorbent resin in the seawater. In a series of controlled aquaria, A. rosea was exposed to Streptomyces ACT-52A at 106 cfu/ml and monitored for up to 360 h. Shifts in microbial communities associated with the sponges occurred within 24 to 48 h after bacterial exposure and continued until 360 h, as revealed by TRFLP. The metabolite profiles of sponge tissues also changed substantially as the microbial community shifted. Control sponges (without added bacteria) and Streptomyces ACT-52A-exposed sponges released different metabolites into the seawater that was captured by the resin. The antibacterial activity of compounds collected from the seawater increased at 96 and 360 h of exposure for the treated sponges compared to the control group due to new compounds being produced and released. Increased antibacterial activity of metabolites from treated sponge tissue was observed only at 360 h, whereas that of control sponge tissue remained unchanged. The results demonstrate that the interaction between sponges and their associated bacteria plays an important role in regulating secondary metabolite production.
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Zununi Vahed S, Barzegari A, Rahbar Saadat Y, Mohammadi S, Samadi N. A microRNA isolation method from clinical samples. ACTA ACUST UNITED AC 2016; 6:25-31. [PMID: 27340621 PMCID: PMC4916548 DOI: 10.15171/bi.2016.04] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 02/08/2016] [Indexed: 12/13/2022]
Abstract
INTRODUCTION microRNAs (miRNAs) are considered to be novel molecular biomakers that could be exploited in the diagnosis and treatment of different diseases. The present study aimed to develop an efficient miRNA isolation method from different clinical specimens. METHODS Total RNAs were isolated by Trizol reagent followed by precipitation of the large RNAs with potassium acetate (KCH3COOH), polyethylene glycol (PEG) 4000 and 6000, and lithium chloride (LiCl). Then, small RNAs were enriched and recovered from the supernatants by applying a combination of LiCl and ethanol. The efficiency of the method was evaluated through the quality, quantity, and integrity of the recovered RNAs using the A260/280 absorbance ratio, reverse transcription PCR (RT-PCR), and quantitative real-time PCR (q-PCR). RESULTS Comparison of different RNA isolation methods based on the precipitation of DNA and large RNAs, high miRNA recovery and PCR efficiency revealed that applying potassium acetate with final precipitation of small RNAs using 2.5 M LiCl plus ethanol can provide high yield and quality small RNAs that can be exploited for clinical purposes. CONCLUSION The current isolation method can be applied for most clinical samples including cells, formalin-fixed and paraffin-embedded (FFPE) tissues and even body fluids with a wide applicability in molecular biology investigations.
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Affiliation(s)
- Sepideh Zununi Vahed
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran ; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran ; School of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegari
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran ; School of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yalda Rahbar Saadat
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Somayeh Mohammadi
- Department of Nutrition, Faculty of Nutrition Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nasser Samadi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran ; School of Advanced Biomedical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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26
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Rivera-Cabello D, Huanca-Mamani W, Vargas HA. Macaria mirthae Vargas et al (Lepidoptera: Geometridae): Confirmation of the Use of an Invasive Host Plant in the Northern Atacama Desert of Chile Based on DNA Barcodes. NEOTROPICAL ENTOMOLOGY 2015; 44:357-364. [PMID: 26174961 DOI: 10.1007/s13744-015-0289-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 03/14/2015] [Indexed: 06/04/2023]
Abstract
Macaria mirthae Vargas et al (Lepidoptera: Geometridae) is a geometrid moth native to the northern Atacama Desert of Chile. Its oligophagous larvae are associated with native hosts of the plant family Fabaceae, the most important of which is Acacia macracantha. The invasive tree Leucaena leucocephala (Fabaceae) was recently recorded as a host plant for M. mirthae based on morphology. The taxonomic status of larvae collected on A. macracantha and L. leucocephala was assessed using sequences of the DNA barcode fragment of the cytochrome c oxidase subunit I (COI) gene. Genetic divergence between samples from the host plants was found to be 0%-0.8% (Kimura 2-parameter model). Neighbor-joining and maximum likelihood analyses were also performed, including additional barcode sequences of Neotropical geometrid moths from GenBank and BOLD databases. Sequences of the larvae from both host plants clustered in a single clade with high statistical support in both analyses. Based on these results, it is concluded that M. mirthae has effectively expanded its host range and its larvae are currently feeding on the exotic tree L. leucocephala. Additionally, the importance of this new host association in a highly disturbed habitat is briefly discussed in terms of the field biology of this native geometrid moth.
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Affiliation(s)
- D Rivera-Cabello
- Depto de Recursos Ambientales, Fac de Ciencias Agronómicas, Univ de Tarapacá, Casilla 6-D, Arica, Chile
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Isolation and preliminary characterization of cyanobacteria strains from freshwaters of Greece. Open Life Sci 2014. [DOI: 10.1515/biol-2015-0006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractCyanobacterial harmful algal blooms (or CyanoHABs) represent one of the most conspicuous waterborne microbial hazards. The characterization of the bloom communities remains problematic because the cyanobacterial taxonomy of certain genera has not yet been resolved. In this study, 29 planktic and benthic cyanobacterial strains were isolated from freshwaters located in Greece. The strains were assigned to the genera
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In vitro and in vivo survival and colonic adhesion of Pediococcus acidilactici MTCC5101 in human gut. BIOMED RESEARCH INTERNATIONAL 2013; 2013:583850. [PMID: 24175293 PMCID: PMC3794518 DOI: 10.1155/2013/583850] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 11/23/2022]
Abstract
The present study aims to investigate the probiotic nature of Pediococcus acidilactici MTCC5101 by an in vitro assay of bacterial adherence to intestinal epithelial cells of human gastrointestinal (GI) tract using Caco-2 cell line. Further to assess the in vivo survival in the GI tract, oral feeding was carried out with the help of 10 healthy volunteers. The effect on wellness was assessed by studying blood biochemical parameters of the volunteers. The survival of the bacteria was assessed using PCR-based detection of P. acidilactici MTCC5101 in fecal samples. The probiotic nature of P. acidilactici MTCC 5101 was strengthened by its adherence to the intestinal epithelial Caco-2 cell line in the in vitro SEM observations. Oral feeding study for assessing the survival of bacteria in GI tract of volunteers showed the strain to be established in the GI tract which survived for about 2 weeks after feeding.
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