Macroalgae host pathogenic Vibrio spp. in a temperate estuary

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: April 2, 2025

Anthropogenic climate change is altering coastal systems globally, affecting macroalgae abundance and composition. These host diverse microbiomes, including pathogenic bacteria. Of particular concern are Vibrio species, such as parahaemolyticus vulnificus , which linked to human disease impact public health, the economy, recreation in areas. This study examined presence of spp. across seven genera a temperate estuary (Narragansett Bay, RI, USA). Using colony-forming unit (CFU) counts multiplex qPCR, we quantified V. assess if varied by genus morphology. We also potential environmental factors influencing prevalence. demonstrate that both were present on all genera, with showing higher average abundance. Environmental like temperature, salinity, nutrient concentrations did not strongly correlate or abundance, suggesting might offer protective microhabitat for these pathogens. Macroalgae opportunistic life strategies had highest highlighting their role reservoirs Future research should explore broader contexts macroalgae– interactions better understand forecast pathogen dynamics.

Language: Английский

Anti-Melanogenesis and Anti-Photoaging Effects of the Sulfated Polysaccharides Isolated from the Brown Seaweed Padina boryana

Polymers, Journal Year: 2023, Volume and Issue: 15(16), P. 3382 - 3382

Published: Aug. 11, 2023

Sulfated polysaccharides isolated from seaweeds are thought of as ideal ingredients in the pharmaceutical, nutraceutical, and cosmetics industries. Our previous study characterized sulfated Padina boryana. The boryana (PBP) were extracted, antioxidant activity PBP was evaluated. results indicate that possesses effects potential cosmetic industry. To further investigate cosmetics, photoprotective anti-melanogenesis test display reduced melanin content murine melanoma cells stimulated by alpha melanocyte-stimulating hormone 203.7% to 183.64%, 144.63%, 127.57% at concentrations 25 μg/mL, 50 100 respectively. anti-photodamage showed significantly protected skin against UVB-stimulated photodamage. suppressed human epidermal keratinocyte (HaCaT cell) death inhibiting apoptosis reducing level intracellular reactive oxygen species. species HaCaT irradiated UVB 192.67% 181.22%, 170.25%, 160.48% μg/mL PBP, In addition, remarkably UVB-induced dermal fibroblast damage suppressing oxidative damage, collagen degradation, attenuating inflammatory responses. These activities suggest is a ingredient

Language: Английский