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Loligo vulgaris

Sahar Elkholy, Sarah Yahia, Manal Awad, Medhat Elmessiery
BACKGROUND: Natural polymer composite materials are becoming increasingly important as scaffolds for bone tissue engineering. Composite materials based on combinations of biodegradable polymers and bioactive ceramics, including CTS and Hap. PURPOSE: β-Chitosan/n-HA composite with different percentages was prepared. Some of the physical and mechanical properties were examined by using (scanning electron microscope and transmission electron microscope). Histological evaluation of in vivo implantation of β-Chitosan/n-HA composite as bone graft material was done...
February 26, 2018: Clinical Implant Dentistry and related Research
Sri Kumaran Nadarajah, Radha Vijayaraj, Jayaprakashvel Mani
Background: The squid ink extract is well known for its biomedical properties. Objective: In this study, squid Loligo vulgaris was collected from Tuticorin costal water, Bay of Bengal, India. Materials and Methods: Proximate composition of the crude squid ink was studied and found to have protein as the major component over lipid and carbohydrates. Further, bioactive fractions of squid ink were extracted with ethanol, and therapeutic applications such as hemolytic, antioxidant, antimicrobial, and in vitro anti-inflammatory properties were analyzed using standard methods...
December 2017: Pharmacognosy Research
Vanessa M Lopes, Rui Rosa, Pedro R Costa
Domoic acid (DA) is a neurotoxin that causes degenerative damage to brain cells and induces permanent short-term memory loss in mammals. In cephalopod mollusks, although DA is known to accumulate primarily in the digestive gland, there is no knowledge whether DA reaches their central nervous system. Here we report, for the first time, the presence of DA in brain tissue of the common octopus (Octopus vulgaris) and the European cuttlefish (Sepia officinalis), and its absence in the brains of several squid species (Loligo vulgaris, L...
February 2018: Marine Environmental Research
Yury N Vorobjev, Harold A Scheraga, Jorge A Vila
A recently introduced electrostatic-based method to determine the pKa values of ionizable residues and fractions of ionized and tautomeric forms of histidine (His) and acid residues in proteins, at a given fixed pH, is applied here to the analysis of a His-rich protein, namely Loligo vulgaris (pdb id 1E1A), a 314-residue all-β protein. The average tautomeric fractions for the imidazole ring of each of the six histidines in the sequence were computed using an approach that includes, but is not limited to, molecular dynamic simulations coupled with calculations of the ionization states for all 94 ionizable residues of protein 1E1A in water at pH 6...
September 25, 2017: Journal of Biomolecular Structure & Dynamics
Baha Eddine Abdelmalek, Assaâd Sila, Anissa Haddar, Ali Bougatef, Mohamed Ali Ayadi
Chitin is the second most abundant polysaccharide in biomass after cellulose and the term chitosan usually refers to a family of polymers obtained after chitin deacetylation. The aim of this work was the preparation and the characterization of chitin and chitosan from the gladius (pen) of the European squid (Loligo vulgaris). A high level of deproteinization (more than 80%) was recorded using Alcalase(®) with an enzyme/protein ratio of 10U/mg. The demineralization of the gladius was completely achieved within 8h at room temperature in HCl...
November 2017: International Journal of Biological Macromolecules
Dhikra Souidenne, Isabelle Florent, Marc Dellinger, Jean Lou Justine, Mohamed Salah Romdhane, Hidetaka Furuya, Philippe Grellier
Chromidina spp. are enigmatic apostome ciliates (Oligohymenophorea, Opalinopsidae) that parasitise the renal and pancreatic appendages of cephalopods. Only four species have been described, among which only three have been formally named. No DNA sequence has been reported so far. To investigate Chromidina spp. diversity, we sampled cephalopods in the Mediterranean Sea off Tunis, Tunisia, and identified two distinct Chromidina spp. in two different host species: Loligo vulgaris and Sepia officinalis. From haematoxylin-stained slides, we described morphological traits for these parasitic species and compared them to previous descriptions...
2016: Parasite: Journal de la Société Française de Parasitologie
Gabriela Picó-Durán, Lorena Pulleiro-Potel, Elvira Abollo, Santiago Pascual, Pilar Muñoz
This study aims to investigate the occurrence of nematode larvae in commercial cephalopods in the Western Mediterranean Sea. A total of 202 animals comprising 123 broadtail shortfin squid (Illex coindetii), 34 European squid (Loligo vulgaris) and 45 common octopus (Octopus vulgaris) were examined using enzymatic digestion. A total of 31 larvae were isolated (prevalence: 14.6%) and identified using molecular analyses which included PCR and sequencing of the ITS (ITS1-5.8S rDNA-ITS2) region. Phylogenetic tree inferred from ITS sequences yielded supported relationships for Anisakis (P: 12...
April 15, 2016: Veterinary Parasitology
Natascia Cozza, Walter Bonani, Antonella Motta, Claudio Migliaresi
Acid-Solubilized Collagen (ASC) and Pepsin-Solubilized Collagen (PSC) were extracted from the mantle of the common European squid, and were comparatively characterized. ASC and PSC were isolated with an extraction yield of 5.1 and 24.2% (on dry weight basis), respectively. SDS-PAGE showed that the ASC was mostly comprised of α1- and α2-chains; while the PSC presented relevant β- and γ-components. GPC analysis confirmed that both the ASC and the PSC consisted of fractions characterized by different molecular weight...
June 2016: International Journal of Biological Macromolecules
Ali Mohammad Latifi, Ali Karami, Samaneh Khodi
Compounds including organophosphorus pesticides (OPs) and chemical nerve agents are toxic compounds synthesized recently which disrupt the mechanisms of neural transmission. Therefore, a critical requirement is the development of a bio-refining technology to facilitate the biodegradation of organophosphorus pollutants. The diisopropylfluorophosphatase (DFPase, EC from the ganglion and brain of Loligo vulgaris acts on P-F bonds present in some OPs. Intracellular production of OPs-degrading enzymes or the use of native bacteria and fungi leads to a low degradation rate of OPs due to a mass transfer issue which reduces the overall catalytic efficiency...
October 2015: Applied Biochemistry and Biotechnology
Alessandro Ianiro, Matteo Di Giosia, Simona Fermani, Chiara Samorì, Marianna Barbalinardo, Francesco Valle, Graziella Pellegrini, Fabio Biscarini, Francesco Zerbetto, Matteo Calvaresi, Giuseppe Falini
The squid pen (gladius) from the Loligo vulgaris was used for preparation of β-chitin materials characterized by different chemical, micro- and nano-structural properties that preserved, almost completely the macrostructural and the mechanical ones. The β-chitin materials obtained by alkaline treatment showed porosity, wettability and swelling that are a function of the duration of the treatment. Microscopic, spectroscopic and synchrotron X-ray diffraction techniques showed that the chemical environment of the N-acetyl groups of the β-chitin chains changes after the thermal alkaline treatment...
December 2014: Marine Drugs
Moncef Rjeibi, Marc Metian, Tarek Hajji, Thierry Guyot, Rafika Ben Chaouacha-Chekir, Paco Bustamante
Concentrations of cadmium (Cd), copper (Cu), mercury (Hg), and zinc (Zn) were determined by atomic absorption spectrophotometry in the muscle tissues (arms and mantle) of 3 commercial cephalopods (Loligo vulgaris, Octopus vulgaris, and Sepia officinalis) caught in 3 different Tunisian coastal regions. The highest concentrations found correspond to the essential elements Cu and Zn. Octopuses and cuttlefish showed the highest levels of those elements whereas squid presented with significantly higher values of Hg in both muscular tissues...
January 2015: Journal of Food Science
Baha Eddine Abdelmalek, Assaâd Sila, Fatma Krichen, Wafa Karoud, Oscar Martinez-Alvarez, Semia Ellouz-Chaabouni, Mohamed Ali Ayadi, Ali Bougatef
The characteristics, biological properties, and purification of sulfated polysaccharides extracted from squid (Loligo vulgaris) skin were investigated. Their chemical and physical characteristics were determined using X-ray diffraction and infrared spectroscopic analysis. Sulfated polysaccharides from squid skin (SPSS) contained 85.06% sugar, 2.54% protein, 1.87% ash, 8.07% sulfate, and 1.72% uronic acid. The antioxidant properties of SPSS were investigated based on DPPH radical-scavenging capacity (IC50 = 19...
January 2015: International Journal of Biological Macromolecules
Yunfeng Zhang, Feng Shi, Jiakun Song, Xugang Zhang, Shiliang Yu
Cephalopods (octopus, squid and cuttlefish) are some of the most intriguing molluscs, and they represent economically important commercial marine species for fisheries. Previous studies have shown that cephalopods are sensitive to underwater particle motion, especially at low frequencies in the order of 10 Hz. The present paper deals with quantitative modeling of the statocyst system in three cephalopod species: Octopus vulgaris, Sepia officinalis and Loligo vulgaris. The octopus's macula/statolith organ was modeled as a 2nd-order dynamic oscillator using parameter values estimated from scanning electron micrograph images...
January 2015: Integrative Zoology
M M Storelli, R Garofalo, D Giungato, R Giacominelli-Stuffler
Total concentrations of essential (Cu, Zn, Se and Cr) and non-essential (Hg, Cd, Pb and As) trace elements were measured in the flesh and hepatopancreas of Octopodidae (Eledone moschata, Eledone cirrhosa, Octopus salutii), Sepiidae (Sepia elegans, Sepia orbignyana) and Loliginidae (Illex coindeti, Loligo vulgaris) from the Mediterranean Sea. As expected, the hepatopancreas showed higher metal concentrations than flesh; the only exceptions were Hg and As, which were equally distributed in the two tissues. Regarding the edible portion, the highest toxic metal concentrations were in Octopodidae (Hg: 0...
2010: Food Additives & Contaminants. Part B, Surveillance
Troy Wymore, Martin J Field, Paul Langan, Jeremy C Smith, Jerry M Parks
Organophosphorus (OP) nerve agents such as (S)-sarin are among the most highly toxic compounds that have been synthesized. Engineering enzymes that catalyze the hydrolysis of nerve agents ("bioscavengers") is an emerging prophylactic approach to diminish their toxic effects. Although its native function is not known, diisopropyl fluorophosphatase (DFPase) from Loligo vulgaris catalyzes the hydrolysis of OP compounds. Here, we investigate the mechanisms of diisopropylfluorophosphate (DFP) and (S)-sarin hydrolysis by DFPase with quantum mechanical/molecular mechanical umbrella sampling simulations...
May 1, 2014: Journal of Physical Chemistry. B
Moncef Rjeibi, Marc Metian, Tarek Hajji, Thierry Guyot, Rafika Ben Chaouacha-Chékir, Paco Bustamante
The concentrations of six metals (Ag, Cd, Cu, Hg, Pb, and Zn) were investigated and compared in three tissues (arms, digestive gland, and mantle) of three cephalopod species from the Tunisian waters: the common octopus (Octopus vulgaris), the common cuttlefish (Sepia officinalis), and the European squid (Loligo vulgaris). Whatever the species or the sites, the digestive gland displayed the highest concentrations of Ag, Cd, Cu, Pb, and Zn, highlighting its major role in their bioaccumulation and detoxification...
June 2014: Environmental Monitoring and Assessment
No abstract text is available yet for this article.
March 1950: Quarterly Journal of Microscopical Science
Rui Rosa, Katja Trübenbach, Marta S Pimentel, Joana Boavida-Portugal, Filipa Faleiro, Miguel Baptista, Gisela Dionísio, Ricardo Calado, Hans O Pörtner, Tiago Repolho
Little is known about the capacity of early life stages to undergo hypercapnic and thermal acclimation under the future scenarios of ocean acidification and warming. Here, we investigated a comprehensive set of biological responses to these climate change-related variables (2°C above winter and summer average spawning temperatures and ΔpH=0.5 units) during the early ontogeny of the squid Loligo vulgaris. Embryo survival rates ranged from 92% to 96% under present-day temperature (13-17°C) and pH (8.0) scenarios...
February 15, 2014: Journal of Experimental Biology
Ralf Stehle, Christoph Schulreich, Stefan Wellert, Jürgen Gäb, Marc-Michael Blum, Kai Kehe, Andras Richardt, Alain Lapp, Thomas Hellweg
The present contribution presents a microemulsion system containing cosmetic oil and sugar surfactant and the enzyme diisopropyl fluorophosphatase (DFPase) as active agent for the decontamination of human skin. The bicontinuous structure and the physical properties of the microemulsion are characterized by dynamic light scattering and small angle neutron scattering. The DFPase from the squid Loligo vulgaris is catalyzing the hydrolysis of highly toxic organophosphates. The effect of the enzyme on the structure of the microemulsion is investigated...
January 1, 2014: Journal of Colloid and Interface Science
Marta Solé, Marc Lenoir, Mercè Durfort, Manel López-Bejar, Antoni Lombarte, Michel André
There is a considerable lack of information concerning marine invertebrate sensitivity to sound exposure. However, recent findings on cuttlefish and octopi showed that exposure to artificial noise had a direct consequence on the functionality and physiology of the statocysts, sensory organs, which are responsible for their equilibrium and movements in the water column. Owing to a lack of available data on deep diving cephalopod species, we conducted a noise exposure comparative experiment on one Mediterranean squid, Illex coindetii, and on the European squid Loligo vulgaris...
2013: PloS One
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