@article {918, title = {Screening of Tyrosinase Inhibitor, Antioxidant and Cytotoxicity of Dried Sea Cucumber from Tomini Bay, Indonesia}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {May 2019}, pages = {555-558}, type = {Original Article}, chapter = {555}, abstract = {

Background: Indonesia, as a tropical country, is one of the important producers of sea cucumbers (beche-de-mer). Sea cucumber is a marine invertebrate that contains attractive bioactive secondary metabolites and these metabolites can be used for health as well as cosmetics. Objective: The aim of the study was to determine the activity of tyrosinase inhibitors, antioxidants, and cytotoxicity of sea cucumber methanolic extract. Methods: Dried sea cucumber samples were taken from Boalemo waters, Tomini Bay, Indonesia. Tyrosinase inhibitor assay was carried out spectrophotometrically using tyrosinase enzymes and L-DOPA as a substrate and antioxidant tests were carried out by DPPH method. Cytotoxicity test against human breast cancer cell line (T47D) was conducted using the MTT assay. Results: The study showed that Bohadschia vitiensis had the best tyrosinase inhibitor activity with IC50 value of 0.28 mg/ml. The DPPH free radical scavenging testing showed that all sea cucumbers had weak antioxidant activity. On the other hand, cytotoxicity assay revealed that several sea cucumbers had good cytotoxicity against T47D cells, where Holothuria atra and Bohadschia marmorata showed strong cytotoxicities with IC50 values of 23.0 and 28.1 ug/mL, respectively. Conclusion: Based on the study, it can be concluded that the dried sea cucumber from the Tomini bay region, Indonesia, has the potential to be developed as a source of tyrosinase inhibitors and cytotoxic agents.

}, keywords = {Antioxidant, Cytotoxicity, Screening, Sea cucumber, Tyrosinase inhibitor}, doi = {10.5530/pj.2019.11.88}, author = {Muhammad Nursid and Endar Marraskuranto and Azizah Kuswardini and Tjahyo Winanto} } @article {771, title = {Total Phenolic Content and Tyrosinase Inhibitory Potential of Extracts from Cajanus cajan (L.) Millsp.}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {November 2018}, pages = {s109-s112}, type = {Original Article}, chapter = {s109}, abstract = {

Background: Cajanus cajan (L.) Millsp. (Fabaceae) is a legume plant which used for human food and animal feed. Objective: The present study was aimed to investigate total phenolic content and tyrosinase inhibitory potential of the root, stem and seed parts of C. cajan. Method: Crude extracts were prepared by reflux extraction using methanol, dichloromethane and water as solvents. Total phenolic contents of the obtained extracts were analyzed by Folin- Ciocalteu colorimetric method and the inhibitory effect on tyrosinase activity was determined spectrophotometrically. Results: The results revealed that dichloromethane seed extract had more total phenolic content than those of methanol and water seed extracts, respectively. Dichloromethane seed extract had the highest total phenolic content of 92.00 \± 1.24 mg GAE/ g extracts. However, the highest tyrosinase inhibitory activity was found in the root methanol extract with IC50 of 3.55 \± 0.35 mg/ml. Conclusion: Type of extraction solvent was an important factor on phenolic contents of C. cajan extracts. The extracts of C. cajan inhibit slightly tyrosinase inhibitory.

}, keywords = {Cajanus cajan, Dichloromethane seed extract, Root methanol extract, total phenolic content, Tyrosinase inhibitor}, doi = {10.5530/pj.2018.6s.21}, author = {Prasob-on Rinthong and Suthira Maneechai} }