Resistance to antibiotics is becoming a very serious problem, with so-called superbugs exhibiting resistance to nearly all conventional antibiotic drugs. Consequently, these organisms often cause severe illness and even death. Alternatives to conventional antibiotics are antimicrobial peptides (AMPs). These widely expressed short peptides, which have been isolated from insects, plants, marine organisms and mammals, including humans, show strong antimicrobial activity against both Gram-negative and Gram-positive bacteria. Most AMPs act by disrupting the bacterial membrane through "Barrel-stave", "Toroidal pore", "carpet" mechanism. In addition, AMPs may prevent septic shock through strongly binding lipopolysaccharides and lipoteichoic acid located on the bacterial membrane. The action mechanisms of AMP to minimize the likelihood developing resistance to the peptides would be particular advantage. For these reasons, we anticipate that AMPs will replace conventional antibiotic drugs in a variety of contexts.
Anti-Bacterial Agents ; Aquatic Organisms ; Gram-Positive Bacteria ; Humans ; Insects ; Lipopolysaccharides ; Mammals ; Membranes* ; Peptides* ; Shock, Septic

Marine biosphere is the largest one of the earth and harbors an enormous number of different organisms. Living conditions differ fundamentally from those in terrestrial environment. The production of specific secondary metabolites is an important adaption mechanism of marine organisms to survive in the sea. These metabolites possess biological activities which make them interesting as possible drugs for human. The review presents sources, chemistry, production and pharmacology of FDA approved marine derived pharmaceuticals arranged according to their therapeutic indication. Four of the presently seven approved drugs are used for the treatment of cancer. Each another one is applicated for treatment of viral diseases, chronic pain and to lower triglyceride level in blood. Some other products are of interest in diagnostic and as experimental tools. Besides, this article describes challenges in drug development from marine sources, especially the supply problem.
Aquatic Organisms ; Chemistry ; Chronic Pain ; Cytostatic Agents ; Humans ; Pharmacology ; Social Conditions ; Triglycerides ; Virus Diseases

As an important branch of traditional medicines,medicinal marine organisms have many advantages,including biological diversity,remarkable biological activity,especial for the treatment of anti-cancer,anti-virus,anti-coagulation,analgesia,anti-bacterial,cardiovascular and cerebrovascular diseases. In recent years,with the continuous exploration of marine organisms by human beings,many marine organisms with specific biological activities and medicinal prospects have been found,which have attracted great attention around the world and thus called " new hope" to solve human health problems. However,due to the rapid development of modern industry,heavy metal pollution not only poses a great threat to medicinal marine living resources,but also hinders the development of marine biomedical industry and threatens human health. In view of this,this paper introduced the development trend of medicinal marine organisms and the current situation of heavy metal pollution and focusing on the analysis technology and chemical removal technology of heavy metals in medicinal marine organisms,which is to provide reference for the heavy metals control in marine medicines and the development and utilization of marine medicines.
Aquatic Organisms ; China ; Environmental Monitoring ; Medicine, Chinese Traditional ; Metals, Heavy/analysis* ; Water Pollutants, Chemical/analysis*

A comparable study were carried out by determination of trace elements on five marine-derived shell traditional Chinese medicine (TCM) (Ostreae Concha, Haliotidis Concha, Margaritifera Concha, Meretricis Concha, and Arcae Concha), which were recorded in the Chinese Pharmacopoeia (2010 version). Seven trace elements in 51 batches of this type of shell TCM were analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), combined with principal component analysis (PCA) methods. The content of element Se, which exhibited significant differences among different drugs, could be used as a key element to distinguish this type of drugs. Meanwhile, the contents of elements Co, Cu, Mo, and Ba in Haliotidis Concha, Co and As in Margaritifera Concha, Mo and As in Meretricis Concha, Mo, As, and Ba in Arcae Concha, and Zn in Meretricis Concha were relatively stable. In the PCA plot, Arcae Concha and Meretricis Concha could be efficiently distinguished from Ostreae Concha together with Haliotidis Concha, and Margaritifera Concha. The results also showed a correlation with their medicinal function. In conclusion, trace elements in marine-derived shell TCM could not be neglected for their quality control.
Animal Shells ; chemistry ; Animals ; Aquatic Organisms ; chemistry ; Bivalvia ; chemistry ; Mass Spectrometry ; Medicine, Chinese Traditional ; Trace Elements ; analysis

This study was performed to investigate the sedative-hypnotic activity of gamma-aminobutyric acid (GABA)-enriched fermented marine organisms (FMO), including sea tangle (FST) and oyster (FO) by Lactobacillus brevis BJ20 (L. brevis BJ20). FST and FO were tested for their binding activity of the GABA(A)-benzodiazepine and 5-HT(2C) receptors, which are well-known molecular targets for sleep aids. We also measured the sleep latency and sleep duration during pentobarbital-induced sleep in mice after oral administration of FST and FO. In GABA(A) and 5-HT(2C) receptor binding assays, FST displayed an effective concentration-dependent binding affinity to GABA(A) receptor, similar to the binding affinity to 5-HT(2C) receptor. FO exhibited higher affinity to 5-HT(2C) receptor, compared with the GABA(A) receptor. The oral administration of FST and FO produced a dose-dependent decrease in sleep latency and increase in sleep duration in pentobarbital-induced hypnosis. The data demonstrate that FST and FO possess sedative-hypnotic activity possibly by modulating GABA(A) and 5-HT(2C) receptors. We propose that FST and FO might be effective agents for treatment of insomnia.
Administration, Oral ; Animals ; Aquatic Organisms* ; gamma-Aminobutyric Acid ; Hypnosis ; Lactobacillus brevis ; Mice ; Ostreidae ; Receptor, Serotonin, 5-HT2C ; Receptors, GABA-A ; Sleep Initiation and Maintenance Disorders

BACKGROUND/OBJECTIVES: In this randomized, placebo-controlled, double-blind study, we evaluated the antihypertensive effects of enzymatic hydrolysate from Styela clava flesh tissue in patients with type 2 diabetes mellitus (T2DM) and hypertension. SUBJECTS/METHODS: S. clava flesh tissue hydrolysate (SFTH) (n = 34) and placebo (n = 22) were randomly allocated to the study subjects. Each subject ingested two test capsules (500 mg) containing powdered SFTH (SFTH group) or placebo capsules (placebo group) during four weeks. RESULTS: In the SFTH group, systolic and diastolic blood pressure decreased significantly 4 weeks after ingestion by 9.9 mmHg (P < 0.01) and 7.8 mmHg (P < 0.01), respectively. In addition, the SFTH group exhibited a significant decrease in hemoglobin A1c with a tendency toward improvement in homeostasis model assessment of insulin resistance, triglyceride, apolipoprotein B and plasma insulin levels after 4 weeks. No adverse effects were observed in other indexes, including biochemical and hematological parameters in both groups. CONCLUSION: The results of our study suggested that SFTH exerts a regulatory, antihypertensive effect in patients with T2DM and hypertension.
Antihypertensive Agents ; Apolipoproteins ; Aquatic Organisms ; Blood Pressure ; Capsules ; Diabetes Mellitus, Type 2 ; Double-Blind Method ; Eating ; Homeostasis ; Humans ; Hypertension* ; Insulin ; Insulin Resistance ; Plasma ; Protein Hydrolysates ; Triglycerides

Corals are the marine organism that belongs to the phylum Cnidaria, and are one of the common causes of superficial injury in the marine environment. In addition to acute reactions such as burning or stinging pain and erythema, coral injuries may present with complications such as foreign body reactions, bacterial infections, and/or localized eczematous reactions. A 23-year-old male presented with an erythematous edematous tender patch with centrally grouped vesicles on the left ankle; the injury had occurred during skin-scuba diving 2 days before. A biopsy of the lesion treated with hematoxylin-eosin stain showed epidermal necrosis with subepidermal blisters and neutrophilic panniculitis. Herein we report a case of cellulitis caused by the nematocyst stings of corals.
Anthozoa ; Aquatic Organisms ; Bacterial Infections ; Biopsy ; Bites and Stings ; Blister ; Burns ; Cellulitis ; Cnidaria ; Diving ; Erythema ; Foreign Bodies ; Humans ; Male ; Necrosis ; Nematocyst ; Neutrophils ; Panniculitis ; Young Adult

Although encounters with poisonous marine organisms occur predominantly in warm temperatures and tropical seas, dangerous marine animals are found as far north as 50degrees latitude. There are some 1000 catfish species inhabiting both fresh and salt waters; many of these fishes are capable of inflicting serious stings. The oriental catfish (Plotosus lineatus) possesses one of the most potent known marine toxins, and it is potentially lethal. We report a case of moderate envenomation by an oriental catfish. A 42-year-old male was stung by an oriental catfish. A puncture wound was noted on his left swollen thumb. He complained of severe pain in the hand and forearm, especially in the punctured finger. Initial management included hotwater immersion, tetanus prophylaxis, antibiotics, analgesics and digital nerve block. He was discharged after observation in the emergency department.
Adult ; Analgesics ; Animals ; Anti-Bacterial Agents ; Aquatic Organisms ; Bites and Stings ; Catfishes* ; Emergency Service, Hospital ; Fingers ; Fishes ; Forearm ; Hand ; Humans ; Immersion ; Male ; Marine Toxins ; Nerve Block ; Oceans and Seas ; Punctures ; Spine* ; Tetanus ; Thumb ; Wounds and Injuries

Anisakiasis, a human infection of Anisakis L3 larvae, is one of the common foodborne parasitic diseases in Korea. Studies on the identification of anisakid larvae have been performed in the country, but most of them have been focused on morphological identification of the larvae. In this study, we analyzed the molecular characteristics of 174 Anisakis type I larvae collected from 10 species of fish caught in 3 different sea areas in Korea. PCR-RFLP and sequence analyses of rDNA ITS and mtDNA cox1 revealed that the larvae showed interesting distribution patterns depending on fish species and geographical locations. Anisakis pegreffii was predominant in fish from the Yellow Sea and the South Sea. Meanwhile, both A. pegreffii and A. simplex sensu stricto (A. simplex s.str.) larvae were identified in fish from the East Sea, depending on fish species infected. These results suggested that A. pegreffii was primarily distributed in a diverse species of fish in 3 sea areas around Korea, but A. simplex s.str. was dominantly identified in Oncorhynchus spp. in the East Sea.
Animals ; Anisakiasis/parasitology/*veterinary ; Anisakis/*classification/genetics/*isolation & purification ; Aquatic Organisms ; Cluster Analysis ; DNA, Helminth/chemistry/genetics ; DNA, Ribosomal Spacer/chemistry/genetics ; Electron Transport Complex IV/genetics ; Fish Diseases/*parasitology ; Fishes ; Korea ; Larva/classification/genetics ; Molecular Sequence Data ; Phylogeny ; Polymerase Chain Reaction ; Polymorphism, Restriction Fragment Length ; Sequence Analysis, DNA

Ocean is a unique and excellent resource that provides a diverse array of intriguing natural products. Marine natural products have demonstrated significant and extremely potent biological activities and have captured the attention of natural products chemists in the past few decades. It is increasingly recognized that a wealth of fascinating natural products and novel chemical entities will play a dominant role in the discovery of useful leads for the development of pharmaceutical agents and provide useful probes to lead to breakthroughs in a variety of life-science fields. This article focused on the research progress of chemistry of marine natural products in recent five years.
Alkaloids ; chemistry ; isolation & purification ; pharmacology ; Animals ; Anti-Infective Agents ; chemistry ; isolation & purification ; pharmacology ; Antineoplastic Agents ; chemistry ; isolation & purification ; pharmacology ; Aquatic Organisms ; chemistry ; Biological Products ; chemistry ; isolation & purification ; pharmacology ; Humans ; Macrolides ; chemistry ; isolation & purification ; pharmacology ; Marine Biology ; Marine Toxins ; chemistry ; isolation & purification ; pharmacology ; Molecular Structure ; Peptides ; chemistry ; isolation & purification ; pharmacology ; Steroids ; chemistry ; isolation & purification ; pharmacology ; Terpenes ; chemistry ; isolation & purification ; pharmacology