• 한국해양바이오학회지
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• 제12권1호
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• pp.66-74
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• 2020

Marine algae contain a variety of substances, such as mycosporine-like amino acids, which can defend against UV irradiation. Among them, Porphyra-334 derived from Porphyra yezoensis is attracting attention as a novel active ingredient for anti-aging cosmetics because of its excellent anti-oxidative, anti-inflammatory, and wound-healing properties through promoting skin cell migration. In this study, a process using direct current (DC) for increasing the yield of large-scale purification of Porphyra-334 was developed. When DC was applied to obtain Porphyra-334 efficiently, the purification time was shortened by approximately 1/4 compared with the process wherein DC was not applied; moreover, the yield of purification was improved.

• 한국산학기술학회논문지
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• 제15권7호
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• pp.4416-4422
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• 2014

오존층의 파괴와 증가하는 야외활동으로 인한 자외선의 노출을 최소화 하기위해 자외선 차단제는 필수적인 것이 되고 있다. 기존에 사용되는 자외선 차단제의 기능을 향상시키며 부작용을 줄이기 위해 천연식물과 같은 친환경적인 소재의 개발이 필요한 실정이다. 본 연구는 천연물을 활용한 자외선차단제 및 기능성 화장품 소재 개발을 위해 미세조류(Chlamydomonas hedleyi.)로부터 Mycosporine-like amino acid (MAA)를 분리 정제하고 그 효능을 평가하고자 하였다. 미세조류에서 분리 정제한 MAAs 중 shinorine을 분리하여 UV에 의한 피부세포의 손상을 막고, 염증과 관련 있는 단백질의 발현을 저해하는지를 평가하였다. 그 결과 shinorine이 피부세포가 UV에 의해 손상되는 것을 보호하여 cell viability가 10% 증가하였고, 염증관련 단백질인 COX2이 발현이 41%정도 감소하는 것을 확인하였다. 또한 콜라겐의 합성을 증가시켜 주름개선 효능을 확인하였다. 이에 shinorine은 자외선 차단용 소재뿐 아니라 항노화 관련 제품의 소재로 가능성을 확인하였다.

• 환경생물
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• 제21권4호
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• pp.368-376
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• 2003

The UV-B sensitivity was tested for the intertidal species Chondrus ocellatus from Korea, by measuring photosynthesis estimated as effective quantum yield ($\Phi_{PSII}$) of photosystem II (PS II), growth and content and composition of photosynthetic pigments and UV-absorbing pigments (UVAPs). The $$\Phi_{PSII}$ of the alga decreased with increasing time of exposure to UV-B radiation, followed by fast and nearly full recovery indicating dynamic photoinhibiton. Fresh weight-based growth and pigment contents of C. ocellatus were not seriously affected by UV-B radiation. A single broad peak at 327 nm was obtained from methanol extracts of C. ocellatus, and the absorbance peak increased with increasing UV. The single peak was resolved into three peaks (311, 330 and 336 nm) by the fourth -derivative, and quantitative change in response to UV-B radiation occurred only at 330 nm. High performance liquid chromatography (HPLC) analysis of purified extracts indicated that three MAAs (mycosporine-like amino acids) are present, asterina 330, palythine and shinorine. Field observations during three growing months showed that C. ocellatus exhibit the highest amount of UVAPs in May followed by July and little trace in September, coinciding with the species' phenology. In an ecological context, dynamic photoinhibition as well as accumulation of UVAPs may enable the shallow water red alga C. ocellatus to be well adapted to high UV-B environments.