Identifying bioactive molecules from marine organisms is still vastly understudied. Fish remain an untapped source of bioactive molecules, even when considering species whose toxicity to other fish species has been noticed before. We assessed potential applications of crude body mucus of the Lusitanian toadfish () and characterized its peptide fraction composition. Mucus samples from three individuals (two wild and one captive) revealed potential antioxidant, antihypertensive, and antimicrobial activities. For antioxidant activity, the best results of 2371 ± 97 µmol Trolox Equivalent/g protein for ORAC and 154 ± 6 µmol Trolox Equivalent/g protein for ABTS were obtained. For antihypertensive activity, the relevant inhibitory activity of ACE resulted in IC of 60 ± 7 µg protein/mL. Antimicrobial activity was also identified against the pathogenic bacteria and . The peptide profile of the crude body mucus was obtained through size exclusion chromatography, with a conspicuous peak at ca. 800 Da. LC-MS/MS allowed the detection of the most probable peptide sequences of this dominant peptide. This is the first study where the bioactive potential of mucus from the Lusitanian toadfish is demonstrated. Peptides with such properties can be applied in the food and pharmaceutical industries.
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http://dx.doi.org/10.3390/molecules28186458 | DOI Listing |
J Mater Chem B
January 2025
Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, Ibaraki 305-0044, Japan.
The colon possesses a unique physiological environment among human organs, where there is a highly viscous body fluid layer called the mucus layer above colonic epithelial cells. Dysfunction of the mucus layer not only contributes to the occurrence of colorectal cancer (CRC) but also plays an important role in the development of chemoresistance in CRC. Although viscosity is an essential property of the mucus layer, it remains elusive how viscosity affects chemoresistance in colon cancer cells.
View Article and Find Full Text PDFAnnu Rev Immunol
January 2025
2Department of Medical Biochemistry and Cell Biology, University of Gothenburg, Gothenburg, Sweden; email:
The mucosal surfaces of the body are the most vulnerable points for infection because they are lined by single or multiple layers of very active epithelial cells. The main protector of these cells is the mucus system generated by the specialized goblet cells secreting its main components, the gel-forming mucins. The organization of the mucus varies from an attached mucus that is impenetrable to bacteria in the large intestine to a nonattached, more penetrable mucus in the small intestine and airways.
View Article and Find Full Text PDFPol J Vet Sci
June 2024
College of Biological Engineering, Henan University of Technology, Zhengzhou, China.
Mannose oligosaccharide (MOS) has been shown to promote animal growth, maintain intestinal health, and activate the intestinal immune system. However, the question of whether MOS can stimulate the immune system and alleviate acetylsalicylic acid (ASA)-induced gut damage remains unresolved. The purpose of this study was to investigate the impact of MOS pretreatment on the immunological and anti-inflammatory capabilities of rats with ASA-induced intestinal injury.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Shanghai Frontier Science Center of Optogenetic Techniques for Cell Metabolism, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
Inflammatory bowel disease involves excess reactive oxygen species (ROS) and hydrogen sulfide (HS) at inflammatory sites. Nanozyme-mediated ROS and HS scavenging therapy is promising for colitis treatment. Here, we synthesized a multiple ROS scavenging CuO nanoparticle and first explored its HS scavenging capacity.
View Article and Find Full Text PDFInflamm Bowel Dis
December 2024
Department of Gastroenterology, Hepatology, Infectious Diseases and Endocrinology, Hannover Medical School, Hannover, Germany.
Background: Defects in SLC26A3, the major colonic Cl-/HCO3- exchanger, result in chloride-rich diarrhea, a reduction in short-chain fatty acid (SCFA)-producing bacteria, and a high incidence of inflammatory bowel disease in humans and in mice. Slc26a3-/- mice are, therefore, an interesting animal model for spontaneous but mild colonic inflammation and for testing strategies to reverse or prevent the inflammation. This study investigates the effect of Escherichia coli Nissle (EcN) application on the microbiome, SCFA production, barrier integrity, and mucosal inflammation in slc26a3-/- mice.
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