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Marine Biology

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https://www.readbyqxmd.com/read/29144022/collagen-a-review-on-its-sources-and-potential-cosmetic-applications
#1
REVIEW
María Isabela Avila Rodríguez, Laura G Rodríguez Barroso, Mirna Lorena Sánchez
Collagen is a fibrillar protein that conforms the conjunctive and connective tissues in the human body, essentially skin, joints, and bones. This molecule is one of the most abundant in many of the living organisms due to its connective role in biological structures. Due to its abundance, strength and its directly proportional relation with skin aging, collagen has gained great interest in the cosmetic industry. It has been established that the collagen fibers are damaged with the pass of time, losing thickness and strength which has been strongly related with skin aging phenomena [Colágeno para todo...
November 16, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29141557/halilectin-3-a-lectin-from-the-marine-sponge-haliclona-caerulea-induces-apoptosis-and-autophagy-in-human-breast-cancer-mcf7-cells-through-caspase-9-pathway-and-lc3-ii-protein-expression-haliclona-caerulea-induces-apoptosis-and-autophagy-in-human-breast-cancer
#2
Paula A Videira, Luiz Gonzaga do Nascimento-Neto, Maria Guadalupe Cabral, Romulo Farias Carneiro, Francisco Vassiliepe Sousa Arruda, Zelia Silva, Celso Shiniti Nagano, Alexandre Holanda Sampaio, Edson Holanda Teixeira
BACKGROUND: An ideal strategy for cancer treatment is the specific induction of tumor cell death, sparing normal cells. Marine sponges are rich biological reservoirs of biomolecules, especially lectins, which have attracted considerable attention due to potential biological effect on human cells. Lectins are proteins that bind specific carbohydrate signatures and some gained further interest for their capacity to bind tumor associated carbohydrates antigens and induce tumor cell apoptosis...
November 13, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/29140270/the-oxepane-motif-in-marine-drugs
#3
REVIEW
Héctor Barbero, Carlos Díez-Poza, Asunción Barbero
Oceans have shown to be a remarkable source of natural products. The biological properties of many of these compounds have helped to produce great advances in medicinal chemistry. Within them, marine natural products containing an oxepanyl ring are present in a great variety of algae, sponges, fungus and corals and show very important biological activities, many of them possessing remarkable cytotoxic properties against a wide range of cancer cell lines. Their rich chemical structures have attracted the attention of many researchers who have reported interesting synthetic approaches to these targets...
November 15, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29135918/phospholipids-of-animal-and-marine-origin-structure-function-and-anti-inflammatory-properties
#4
REVIEW
Ronan Lordan, Alexandros Tsoupras, Ioannis Zabetakis
In this review paper, the latest literature on the functional properties of phospholipids in relation to inflammation and inflammation-related disorders has been critically appraised and evaluated. The paper is divided into three sections: (Section 1) presents an overview of the relationship between structures and biological activities (pro-inflammatory or anti-inflammatory) of several phospholipids with respect to inflammation. (Section 2) and (Section 3) are dedicated to the structures, functions, compositions and anti-inflammatory properties of dietary phospholipids from animal and marine sources...
November 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29132209/carbon-nitrogen-and-mercury-isotope-evidence-for-the-biogeochemical-history-of-mercury-in-hawaiian-marine-bottomfish
#5
Dana Sackett, Jeffrey C Drazen, Brian N Popp, C Anela Choy, Joel D Blum, Marcus W Johnson
The complex biogeochemical cycle of Hg makes identifying primary sources of fish tissue Hg problematic. To identify sources and provide insight into this cycle, we combined carbon (δ13C), nitrogen amino acid (δ15NPhe), and Hg isotope (Δ199Hg, Δ201Hg, δ202Hg) data for six species of Hawaiian marine bottomfish. Results from these isotopic systems identified individuals within species that likely fed from separate food webs. Terrestrial freshwater inputs to coastal sediments were identified as the primary source of tissue Hg in the jack species, Caranx ignobilis, which inhabit shallow marine ecosystems...
November 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29129053/research-on-chemical-composition-and-biological-properties-including-anti-quorum-sensing-activity-of-angelica-pancicii-vandas-aerial-parts-and-roots
#6
Ksenija S Mileski, Snežana S Trifunović, Ana D Ćirić, Željana M Šakić, Mihailo S Ristić, Nina M Todorović, Vlado S Matevski, Petar D Marin, Vele V Tesevic, Ana M Džamić
The essential oil, different extracts and isolated compounds of Angelica pancicii Vandas (Apiaceae) were investigated for the first time. The GC-FID and GC-MS analyses revealed sesquiterpenoids as the main constituents of A. pancicii essential oil of aerial parts with bornyl acetate (8.08%), n-octanol (5.82%), kessane (4.26%) and β-selinene (4.26%) as the main constituents. Analysis of methanol extracts, using HPLC-DAD/ESI-ToF-MS system, showed a total of 52 compounds in the aerial parts and 53 in the roots, indicated coumarins as the main constituents...
November 11, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29127871/marine-radioecology-after-the-fukushima-dai-ichi-nuclear-accident-are-we-better-positioned-to-understand-the-impact-of-radionuclides-in-marine-ecosystems
#7
J Vives I Batlle, M Aoyama, C Bradshaw, J Brown, K O Buesseler, N Casacuberta, M Christl, C Duffa, N R E N Impens, M Iosjpe, P Masqué, J Nishikawa
This paper focuses on how a community of researchers under the COMET (CO-ordination and iMplementation of a pan European projecT for radioecology) project has improved the capacity of marine radioecology to understand at the process level the behaviour of radionuclides in the marine environment, uptake by organisms and the resulting doses after the Fukushima Dai-ichi nuclear accident occurred in 2011. We present new radioecological understanding of the processes involved, such as the interaction of waterborne radionuclides with suspended particles and sediments or the biological uptake and turnover of radionuclides, which have been better quantified and mathematically described...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29126967/effects-of-temperature-and-salinity-on-prevalence-and-intensity-of-infection-of-blue-crabs-callinectes-sapidus-by-vibrio-cholerae-v-parahaemolyticus-and-v-vulnificus-in-louisiana
#8
Timothy J Sullivan, Joseph E Neigel
Coastal marine and estuarine environments are experiencing higher average temperatures, greater frequency of extreme temperature events, and altered salinities. These changes are expected to stress organisms and increase their susceptibility to infectious diseases. However, beyond these generalities, little is known about how environmental factors influence host-pathogen relationships in the marine realm. We investigated the prevalence and intensity of infections by Vibrio cholerae, V. parahaemolyticus, and V...
November 7, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29126644/radionuclide-concentration-processes-in-marine-organisms-a-comprehensive-review
#9
Fernando P Carvalho
The first measurements made of artificial radionuclides released into the marine environment did reveal that radionuclides are concentrated by marine biological species. The need to report radionuclide accumulation in biota in different conditions and geographical areas prompted the use of concentration factors as a convenient way to describe the accumulation of radionuclides in biota relative to radionuclide concentrations in seawater. Later, concentration factors became a tool in modelling radionuclide distribution and transfer in aquatic environments and to predicting radioactivity in organisms...
November 8, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29125580/structural-diversity-biological-properties-and-applications-of-natural-products-from-cyanobacteria-a-review
#10
REVIEW
Sayed Asmat Ali Shah, Najeeb Akhter, Bibi Nazia Auckloo, Ishrat Khan, Yanbin Lu, Kuiwu Wang, Bin Wu, Yue-Wei Guo
Nowadays, various drugs on the market are becoming more and more resistant to numerous diseases, thus declining their efficacy for treatment purposes in human beings. Antibiotic resistance is one among the top listed threat around the world which eventually urged the discovery of new potent drugs followed by an increase in the number of deaths caused by cancer due to chemotherapy resistance as well. Accordingly, marine cyanobacteria, being the oldest prokaryotic microorganisms belonging to a monophyletic group, have proven themselves as being able to generate pharmaceutically important natural products...
November 10, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29124637/large-scale-geographic-patterns-of-mercury-contamination-in-morocco-revealed-by-freshwater-turtles
#11
Tahar Slimani, Mohamed Said El Hassani, El Hassan El Mouden, Marine Bonnet, Paco Bustamante, François Brischoux, Maud Brault-Favrou, Xavier Bonnet
Mercury (Hg) is a toxic contaminant present in most aquatic ecosystems. High concentrations pose serious threats to organisms and to human health. Because previous studies focused on few countries, environmental hazard due to Hg contamination remains obscure in many geographic areas, and for example limited information is available in North Africa. We examined total Hg contamination in 13 sites in Morocco (12 rivers and one lake) spread over a large area, 400 km north-south and 350 km west-east, that encompasses different biogeographic zones separated by the Atlas Mountains...
November 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29119384/tributyltin-advancing-the-science-on-assessing-endocrine-disruption-with-an-unconventional-endocrine-disrupting-compound
#12
Laurent Lagadic, Ioanna Katsiadaki, Ron Biever, Patrick D Guiney, Natalie Karouna-Renier, Tamar Schwarz, James P Meador
Tributyltin (TBT) has been recognized as an endocrine disrupting chemical (EDC) for several decades. However, only in the last decade, was its primary endocrine mechanism of action (MeOA) elucidated-interactions with the nuclear retinoid-X receptor (RXR), peroxisome proliferator-activated receptor γ (PPARγ), and their heterodimers. This molecular initiating event (MIE) alters a range of reproductive, developmental, and metabolic pathways at the organism level. It is noteworthy that a variety of MeOAs have been proposed over the years for the observed endocrine-type effects of TBT; however, convincing data for the MIE was provided only recently and now several researchers have confirmed and refined the information on this MeOA...
November 9, 2017: Reviews of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29118593/stranding-survey-as-a-framework-to-investigate-rare-cetacean-records-of-the-north-and-north-eastern-brazilian-coasts
#13
Alexandra Fernandes Costa, Salvatore Siciliano, Renata Emin-Lima, Bruna Maria Lima Martins, Maura Elisabeth Moraes Sousa, Tommaso Giarrizzo, José de Sousa E Silva Júnior
Marine mammal stranding events are used as an important tool for understanding cetacean biology worldwide. Nonetheless, there are vast gaps of knowledge to be filled in for a wide range of species. Reputable information is required regarding species from large baleen whales to sperm and beaked whales, as well as pelagic dolphins. This paper describes new cetacean records from north and north-eastern Brazil, which are both the least surveyed areas regarding aquatic mammals. Regular beach surveys were conducted to recover cetacean carcasses along the coast of Pará beginning November 2005...
2017: ZooKeys
https://www.readbyqxmd.com/read/29117128/bioactive-secondary-metabolites-from-the-marine-sponge-genus-agelas
#14
REVIEW
Huawei Zhang, Menglian Dong, Jianwei Chen, Hong Wang, Karen Tenney, Phillip Crews
The marine sponge genus Agelas comprises a rich reservoir of species and natural products with diverse chemical structures and biological properties with potential application in new drug development. This review for the first time summarized secondary metabolites from Agelas sponges discovered in the past 47 years together with their bioactive effects.
November 8, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29116094/underwater-sound-from-vessel-traffic-reduces-the-effective-communication-range-in-atlantic-cod-and-haddock
#15
Jenni A Stanley, Sofie M Van Parijs, Leila T Hatch
Stellwagen Bank National Marine Sanctuary is located in Massachusetts Bay off the densely populated northeast coast of the United States; subsequently, the marine inhabitants of the area are exposed to elevated levels of anthropogenic underwater sound, particularly due to commercial shipping. The current study investigated the alteration of estimated effective communication spaces at three spawning locations for populations of the commercially and ecologically important fishes, Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus)...
November 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29113895/isolation-structural-characterization-and-antiproliferative-activity-of-phycocolloids-from-the-red-seaweed-laurencia-papillosa-on-mcf-7-human-breast-cancer-cells
#16
Ahmed Ghannam, Hossam Murad, Marie Jazzara, Adnan Odeh, Abdul Wahab Allaf
Hydrocolloids from seaweeds (phycocolloids) have interesting functional properties like antiproliferative activity. Marine algae consumptions are linked to law cancer incidences in countries that traditionally consume marine products. In this study, we have investigated water-soluble sulfated polysaccharides isolated from the red seaweed Laurencia papillosa and determined their chemical characteristics and biological activities on the human breast cancer cell line MCF-7. Total polysaccharides were extracted and fractionated from L...
November 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29113798/fucoxanthin-attenuates-fatty-acid-induced-lipid-accumulation-in-fl83b-hepatocytes-through-regulated-sirt1-ampk-signaling-pathway
#17
Yi-Hsien Chang, Ya-Ling Chen, Wen-Chung Huang, Chian-Jiun Liou
The fucoxanthin, isolated from brown algae, was reported to have multiple biological functions to anti-inflammation, anti-tumor, and ameliorated obesity in mice. In this study we investigated whether fucoxanthin could inhibit lipids accumulation in FL83B hepatocytes. FL83B cells were induced as fatty liver cell model by 0.5 mM oleic acid for 48 h, and treated with various concentration of fucoxanthin for 24 h. The results demonstrated that fucoxanthin significantly suppressed lipid accumulation and decreased lipid peroxidation in hepatocytes...
November 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29109689/molecular-plasticity-under-ocean-warming-proteomics-and-fitness-data-provides-clues-for-a-better-understanding-of-the-thermal-tolerance-in-fish
#18
Diana Madeira, José E Araújo, Rui Vitorino, Pedro M Costa, José L Capelo, Catarina Vinagre, Mário S Diniz
Ocean warming is known to alter the performance and fitness of marine organisms albeit the proteome underpinnings of species thermal tolerance are still largely unknown. In this 1-month experiment we assessed the vulnerability of the gilt-head sea bream Sparus aurata, taken here as a biological model for some key fisheries species, to ocean warming (control 18°C, nursery ground temperature 24°C and heat wave 30°C). Survival was impaired after 28 days, mainly at 30°C although fishes' condition was unaltered...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29109396/electricity-generation-from-digitally-printed-cyanobacteria
#19
Marin Sawa, Andrea Fantuzzi, Paolo Bombelli, Christopher J Howe, Klaus Hellgardt, Peter J Nixon
Microbial biophotovoltaic cells exploit the ability of cyanobacteria and microalgae to convert light energy into electrical current using water as the source of electrons. Such bioelectrochemical systems have a clear advantage over more conventional microbial fuel cells which require the input of organic carbon for microbial growth. However, innovative approaches are needed to address scale-up issues associated with the fabrication of the inorganic (electrodes) and biological (microbe) parts of the biophotovoltaic device...
November 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/29107095/anticancer-activity-of-seaweeds
#20
REVIEW
Anllely G Gutiérrez-Rodríguez, Claudia Juárez-Portilla, Tatiana Olivares-Bañuelos, Rossana C Zepeda
Cancer is a major health problem worldwide and still lacks fully effective treatments. Therefore, alternative therapies, using natural products, have been proposed. Marine algae are an important component of the marine environment, with high biodiversity, and contain a huge number of functional compounds, including terpenes, polyphenols, phlorotannins, and polysaccharides, among others. These compounds have complex structures that have shown several biological activities, including anticancer activity, in several in vitro and in vivo models...
October 26, 2017: Drug Discovery Today
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