Effect of phlorotannins isolated from Ecklonia cava on melanogenesis and their protective effect against photo-oxidative stress induced by UV-B radiation

Marine natural products: chemical and biological potential of seaweeds and their endophytic fungi

“…Recently, the biological knowledge and the promising potential for cosmeceutical applications have been reviewed for phlorotannins, some alginates (25) and fucoxanthins (26) (Wijesinghe & Jeon, 2011). Dieckol (27) has been reported as a promising target for application in antiaging and whitening formulations due to its exceptional protective activity against photooxidative stress, besides its tyrosinase inhibitory activity (Heo et al, 2009;Li et al, 2009). Recently, the isolation of a new asymmetric bis-diterpene dictyotadimer A (28) from the genus Dictyota Lamouroux was reported (Viano et al, 2011), while at the same time antiviral diterpenes (29) were found in Dictyota menstrualis (Hoyt) Schetter, Höming & Weber-Peukert (Cavalcanti et al, 2011).…”

Photoprotective Effect of a <i>Polyopes affinis</i> (Harvey) Kawaguchi and Wang (<i>Halymeniaceae</i>)-Derived Ethanol Extract on Human Keratinocytes

“…Of importance to the current study, phlorotannins are also capable of absorbing UV radiation, thereby protecting cells against photodamage [16] and animals against UVB-induced skin carcinogenesis [17]. In addition, phlorotannins can inhibit melanogenesis and protect cells against photo-oxidative stress induced by UVB radiation [18]. Hence, phlorotannins are likely in part responsible for the photo-protective actions of PAE against UVB radiation.…”

Feeding the Abalone Haliotis discus hannai with the Seaweed Eisenia bicyclis Allows the Accumulation of Phlorotannins

“…All compounds were isolated on the basis of retention times. Phlorotannin content was assessed by measuring the dimensions of HPLC peaks and comparing these with those of and Glombitza, 1986) and exhibit a variety of physiological activities, including antioxidant (Yoon et al, 2011), antidiabetic (Okada et al, 2004), antimicrobial (Eom et al, 2011), anti-inflammatory Kang et al, 2013), and antihypertensive properties; they inhibit melanogenesis (Heo et al, 2009), metalloproteinases , and reverse transcriptase (Ahn et al, 2004), induce quinine reductase (Yoon et al, 2013), and exert depressive effects on the central nervous system (Cho et al, 2012). However, E. bicyclis has a bitter tannin-rich taste; it is also tough in texture and is thus unappetizing.…”