Antioxidant and ACE Inhibitory Activities of Styela clava according to Harvesting Time

Abstract

The antioxidant and angiotensin converting enzyme (ACE) inhibitory harvesting times were evaluated. During February and July of 2008, Styela clava were harvested once per month, and divided into flesh and tunic parts.Each collected part was extracted with water and 70% ethanol. DPPH radical scavenging activity (RSA) for flesh part was higher than that of tunic part, and water extract of flesh harvested at April showed the highest value (53.02% at 10 mg/mL). The highest ABTS RSA was found at water extract of flesh part harvested at March. Water extracts of flesh parts harvested from March to May showed relatively higher ACE inhibitory activity, and freezing did not affect ACE inhibitory activity. The results indicated that antioxidant and ACE inhibitory activity of S. clava were variable depending on harvesting time and parts.

Evaluation of the Physicochemical, Antioxidant, and Antibacterial Properties of Tunichrome Released from Phallusia nigra Persian Gulf Marine Tunicate

“…ey reported that this extract showed high dosedependent antioxidant activity, and water extract had 0.192 mg/ml. Also, Lee et al [60] showed that the RSA of the water and ethanol Styela clava tunic extracts was 31 and 48.6% at 10 mg/ml, respectively. Lee et al [61] also reported high scavenging activities (50%) of starfish Acanthaster planci extracts at concentrations of 1.62 mg/ml, >10 mg/ml, and 4.03 mg/ml for the ethanol, ethyl acetate, and n-butanol extracts, respectively.…”

Anti-inflammatory effect of enzymatic hydrolysates fromStyela clavaflesh tissue in lipopolysaccharide-stimulated RAW 264.7 macrophages andin vivozebrafish model

“…Styela clava , used in this study, is an important cultured aquatic species used for food by people in Korea. Several studies on S. clava have pointed out a variety of biological benefits, including antioxidative [ 9 ], anticancer [ 10 ] hepatoprotective [ 11 ] and antihypertensive effects [ 12 , 13 ]. Although the protein content of S. clava flesh tissue is more than 60%, there remains a paucity of data regarding the biological activities of S. clava flesh tissue protein.…”

Untitled

“…4). 25 studied that the DPPH radical scavenging activity for the fleshy part of S. clava was higher than that of tunic part and water extracted showed the highest value (53.0% at10 mgmL -1 ). Previous studies have suggested that the DPPH radical scavenging capacities of extracts are largely affected by the presence and position of the phenolic hydroxyl group.…”