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Carotenoids from Cyanobacteria: A Biotechnological Approach for the Topical Treatment of Psoriasis

Overview
Journal Microorganisms
Specialty Microbiology
Date 2020 Feb 27
PMID 32098255
Citations 20
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Abstract

In this study, five cyanobacteria strains ( LEGE15481, LEGE12431, () LEGE13457, LEGE03282 and -like sp. LEGE13412) from the Blue Biotechnology and Ecotoxicology Culture Collection (LEGE CC) of CIIMAR were explored for their biotechnological potential in the treatment of psoriasis. Different extracts were characterized for their pigment profile by HPLC-PDA. The antioxidant potential of the extracts was assessed against the superoxide anion radical (O). Their anti-inflammatory and antiproliferative potential was assessed in vitro using the macrophages RAW 264.7 and the human keratinocytes HaCaT as cell-line models, respectively. Terrestrial and freshwater strains presented the highest carotenoid content (33193-63926 μg/g dry extract), with all--carotene, zeaxanthin, echinenone and lutein derivatives being the most abundant carotenoids. Acetone was the most effective solvent for pigment extraction. The acetone extracts presented the lowest IC values (0.29-0.38 mg dry extract/mL) regarding O scavenging, and revealed anti-inflammatory potential, with LEGE13457, LEGE15481 and -like sp. LEGE13412 reducing the nitric oxide (NO) in RAW 264.7 cell culture medium in about 25% ( < 0.05). With the exception of LEGE15481, all the extracts significantly reduced keratinocyte proliferation ( < 0.05), demonstrating a selective toxicity among the different cell lines. Overall, -like sp. LEGE13412 and LEGE13457 seem promising for further exploitation in the framework of psoriasis, due to their antioxidant, anti-inflammatory and antiproliferative potential.

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