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Marine Drugs, Volume 16, Issue 6

June 2018 - 42 articles

Cover Story: Malaria has caused millions of deaths, and drug resistance against current treatments is rising; thus, new drugs directed to novel targets are urgently needed. An Australian study focused on underexplored ecological niches where ascidian-associated actinomycetes were isolated. By an approach utilizing HSQC-TOCSY NMR profiles and biological activity data, the scientists identified antiplasmodial polyketide-producing strains of actinomycetes. The extract obtained from an isolated Streptomyces sp. (USC-16018) exhibited 97% inhibition of Plasmodium falciparum at 0.2 μg/mL. Large-scale fermentation and subsequent purification of this culture resulted in the isolation of two polyketides, the new herbimycin G and the known elaiophylin, which both exhibited antiplasmodial activity. These findings stress the idea that actinomycetes are still an unexhausted source of new bioactive compounds.View this paper.
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Articles (42)

  • Article
  • Open Access
8 Citations
4,420 Views
12 Pages

Effect of Methionine Oxidation and Substitution of α-Conotoxin TxID on α3β4 Nicotinic Acetylcholine Receptor

  • Jie Ren,
  • Rui Li,
  • Jiong Ning,
  • Xiaopeng Zhu,
  • Dongting Zhangsun,
  • Yong Wu and
  • Sulan Luo

20 June 2018

α-Conotoxin TxID was discovered from Conus textile by gene cloning, which has 4/6 inter-cysteine loop spacing and selectively inhibits α3β4 nicotinic acetylcholine receptor (nAChR) subtype. However, TxID is susceptible to modification due to it conta...

  • Article
  • Open Access
47 Citations
12,997 Views
13 Pages

Dietary Supplementation with a Magnesium-Rich Marine Mineral Blend Enhances the Diversity of Gastrointestinal Microbiota

  • Erin K. Crowley,
  • Caitriona M. Long-Smith,
  • Amy Murphy,
  • Elaine Patterson,
  • Kiera Murphy,
  • Denise M. O’Gorman,
  • Catherine Stanton and
  • Yvonne M. Nolan

20 June 2018

Accumulating evidence demonstrates that dietary supplementation with functional food ingredients play a role in systemic and brain health as well as in healthy ageing. Conversely, deficiencies in calcium and magnesium as a result of the increasing pr...

  • Article
  • Open Access
93 Citations
7,006 Views
21 Pages

20 June 2018

To the best of our knowledge, cyanobacterial strains from the Arabian Gulf have never been investigated with respect to their potential for nanoparticle production. Lyngbya majuscula was isolated from the AlOqair area, Al-Ahsa Government, Eastern Pro...

  • Article
  • Open Access
14 Citations
4,796 Views
11 Pages

Raistrickiones A−E from a Highly Productive Strain of Penicillium raistrickii Generated through Thermo Change

  • De-Sheng Liu,
  • Xian-Guo Rong,
  • Hui-Hui Kang,
  • Li-Ying Ma,
  • Mark T. Hamann and
  • Wei-Zhong Liu

18 June 2018

Three new diastereomers of polyketides (PKs), raistrickiones A−C (1–3), together with two new analogues, raistrickiones D and E (4 and 5), were isolated from a highly productive strain of Penicillium raistrickii, which was subjected to an...

  • Review
  • Open Access
37 Citations
10,150 Views
26 Pages

Chemistry and Biological Activities of the Marine Sponges of the Genera Mycale (Arenochalina), Biemna and Clathria

  • Amr El-Demerdash,
  • Mohamed A. Tammam,
  • Atanas G. Atanasov,
  • John N. A. Hooper,
  • Ali Al-Mourabit and
  • Anake Kijjoa

18 June 2018

Over the past seven decades, particularly since the discovery of the first marine-derived nucleosides, spongothymidine and spongouridine, from the Caribbean sponge Cryptotethya crypta in the early 1950s, marine natural products have emerged as unique...

  • Article
  • Open Access
26 Citations
6,591 Views
22 Pages

17 June 2018

Heteronemin, the most abundant secondary metabolite in the sponge Hippospongia sp., exhibited potent cytotoxic activity against several cancer cell lines. It increased the percentage of apoptotic cells and reactive oxygen species (ROS) in Molt4 cells...

  • Article
  • Open Access
59 Citations
8,474 Views
19 Pages

15 June 2018

The acid solubilised collagen (ASC) and pepsin solubilised collagen (PSC) were extracted from the by-products (skin) of a cartilaginous fish (Mustelus mustelus). The ASC and PSC yields were 23.07% and 35.27% dry weight, respectively and were identifi...

  • Review
  • Open Access
30 Citations
7,583 Views
11 Pages

Marine Myxobacteria: A Few Good Halophiles

  • Hanan Albataineh and
  • D. Cole Stevens

14 June 2018

Currently considered an excellent candidate source of novel chemical diversity, the existence of marine myxobacteria was in question less than 20 years ago. This review aims to serve as a roll call for marine myxobacteria and to summarize their uniqu...

  • Article
  • Open Access
24 Citations
5,713 Views
15 Pages

Isolation and Structure Elucidation of Cembranoids from a Dongsha Atoll Soft Coral Sarcophyton stellatum

  • Atallah F. Ahmed,
  • Yi-Wei Chen,
  • Chiung-Yao Huang,
  • Yen-Ju Tseng,
  • Chi-Chen Lin,
  • Chang-Feng Dai,
  • Yang-Chang Wu and
  • Jyh-Horng Sheu

14 June 2018

Six new polyoxygenated cembrane-based diterpenoids, stellatumolides A–C (1–3), stellatumonins A and B (4 and 5), and stellatumonone (6), were isolated together with ten known related compounds (7–16) from the ethyl acetate (EtOAc) e...

  • Article
  • Open Access
13 Citations
5,269 Views
14 Pages

Smenamide A Analogues. Synthesis and Biological Activity on Multiple Myeloma Cells

  • Alessia Caso,
  • Ilaria Laurenzana,
  • Daniela Lamorte,
  • Stefania Trino,
  • Germana Esposito,
  • Vincenzo Piccialli and
  • Valeria Costantino

13 June 2018

Smenamides are an intriguing class of peptide/polyketide molecules of marine origin showing antiproliferative activity against lung cancer Calu-1 cells at nanomolar concentrations through a clear pro-apoptotic mechanism. To probe the role of the acti...

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Mar. Drugs - ISSN 1660-3397