Claim Missing Document
Check
Articles

Found 3 Documents
Search

α-/β-Glucosidase and α-Amylase Inhibitory Activities of Roselle (Hibiscus sabdariffa L.) Ethanol Extract Gondokesumo, Marisca Evalina; Kusuma, Hanna Sari Widya; Widowati, Wahyu
Molecular and Cellular Biomedical Sciences Vol 1, No 1 (2017)
Publisher : Cell and BioPharmaceutical Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21705/mcbs.v1i1.3

Abstract

Background: Diabetes mellitus is a metabolic disease, characterized by hyperglycemia due to disturbance in both insulin secretion and function. One of theurapeutic approaches is to reduce blood glucose levels by inhbiting α-/β-glucosidase and α-amylase involved in carbohydrate digestion. Thus, inhibition of these enzymes play important role in the treatment of diabetes mellitus. Roselle (Hibiscus sabdariffa L.) has been known to have several medicinal properties and potency as an antidiabetics agents. This reseacrh aimed to observe antidiabetic properties of roselle ethanol extract (REE) towards α-glucosidase, β-glucosidase and α-amylase.Materials and Methods: REE was done with maceration technique using diluent of 70% ethanol. Antidiabetic properties were measured by inhibitory activity of α-amylase, α-glucosidase and β-glucosidase.Results: REE was able to inhibit α-/β-glucosidase and α-amylase in the highest concentration with inhibition percentage of 72.68, 47.34 and 73.08% respectively, and were comparable with Acarbose of 81.49, 50.97, 73.08%. The median inhibitory concentration (IC50) of α-/β-glucosidase and α-amylase of REE were 15.81, 41.77, 18.09 μg/mL respectively, and Acarbose were 9.45, 22.57, 3.64 μg/mL respectively.Conclusions: REE inhibits α-/β-glucosidase and α-amylase.Keywords: Roselle, Acarbose, α-glucosidase, β-glucosidase, α-amylase, antidiabetic
Antioxidant and Antityrosinase Activities of Ethanolic Pachyrhizuserosus Peel and Tuber Extract Siregar, Irma Dolsyeria; Kusuma, Hanna Sari Widya; Widowati, Wahyu; Marpaung, Hans Hotma; Ferdinand, Sahna; Fachrial, Edy; Lister, I Nyoman Ehrich
Majalah Kedokteran Bandung Vol 51, No 2 (2019)
Publisher : Faculty of Medicine, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.515 KB) | DOI: 10.15395/mkb.v51n2.1628

Abstract

Aging process is a physiological process in living organisms caused by, among others, free radicals. One of the free-radical-related aging problems is skin hyperpigmentation (excessive melanin) due to increasing tyrosinase enzyme activities. Natural compounds are widely used as antioxidant and antiaging agents. Bengkuang (Pachyrhizuserosus) is known as a source of various active compounds which can be used against free radicals to reduce the risk of skin aging  through  tyrosinase enzyme inhibition. This study was performed in September 2018 in Aretha Medika Utama, Biomolecular and Biomedical Research Center, Bandung, Indonesia to examine the antioxidant and antityrosinase properties of Pachyrhizuserosus peel extract (PPE) and Pachyrhizuserosus  tuber extract (PTE).The extraction of PPE and PTE was performed using 70% ethanol by maceration method, followed by  phytochemical analysis using modified Farnsworth method. Antioxidant activities were measured through 2,2-Diphenyl-1-picrylhydrazil (DPPH) scavenging activities while antiaging assay were conducted through the  tyrosinase activity inhibition. In this study, PPE contained saponin, tannin, triterpenoid, and terpenoid while the PTE showed the presence of flavonoid, saponin, phenol, tannin, and alkaloid in phytochemical analysis. In the antioxidant assay, PPE presented a higher DPPH scavenging activities (IC50= 84.09 µg/mL) when compared to PTE (IC50= 98.30 µg/mL)(p<0.05). In antiaging assay, PPE showed a higher tyrosinase inhibitory activities when compared to PTE with =97.05µg/mL and 194.51µg/mL,respectively. It can be concluded that PPE has antioxidant and antiaging activities effective for preventing skin aging. Aktivitas Antioksidan dan Antitirosinase Ekstrak Etanol Kulit dan Daging PachyrhizuserosusProses penuaan merupakan suatu proses fisiologis yang terjadi pada makhluk hidup yang dapat disebabkan oleh radikal bebas. Hiperpigmentasi kuli tmerupakan salah satu masalah penuaan yang disebabkan oleh radikal bebas melalui peningkatan aktivitas enzim tirosinase. Bengkuang (Pachyrhizus erosus) diketahui mengandung berbagai senyawa aktif yang dapat menangkal radikal bebas serta mengurangi risiko penuaan kulit. Penelitian dilaksanakan pada September 2018 di Aretha Medika Utama, Biomolecular and Biomedical Research Center, Bandung, Indonesia untuk menguji kemampuan aktivitas antioksidan dan antitirosinase pada ekstrak etanol kulit bengkuang (EEKB) dan ekstrak etanol daging bengkuang (EEDB). Pembuatan ekstrak kulit dan daging bengkuang dilakukan dengan cara mengekstraksi bahan dengan etanol 70% menggunakan metode maserasi, kemudian dilanjutkan dengan analisis fitokimia ekstrak dengan modifikasi metode Farnsworth. Aktivitas antioksidan diuji dengan mengukur pemerangkapan 2,2-Diphenyl-1-picrylhydrazil (DPPH) sedangkan antiaging diuji dengan mengukur aktivitas penghambatan tirosinase. Pada uji fitokimia menunjukkan EEKB memiliki kandungan senyawa saponin, tanin, triterpenoid dan terpenoid, sedangkan EEDB menunjukkan kandungan senyawa flavonoid, saponin, fenol, tanin, dan alkaloid. Pada uji antioksidan, EEKB memiliki aktivitas tertinggi pada pemerangkapan DPPH (IC50=84.09 µg/mL) dibanding dengan EEDB (IC50=98.30 µg/mL) (p≤0.05). Pada pengujian antiaging, EEKB memiliki nilai yang lebih tinggi pada aktivitas penghambatan tirosinase dibandingkan dengan EEDB (IC50=97.05 µg/mL; 194.51 µg/mL (p≤0.05). Simpulan, EEKB memiliki aktivitas antioksidan dan antiaging sehingga efektif dalam mencegah penuaan kulit. 
Antioxidant and Antiaging Assays of Ageratum conyzoides (L.) Ethanolic Extract Sutjiatmo, Afifah B; Edriayani, Novi; Mulyasari, Tira Endang; Hermanto, Faizal; Fahrauk, M.; Sukandar, Elin Y.; Kusuma, Hanna Sari Widya; Rizal, Rizal; Widowati, Wahyu
Pharmaceutical Sciences and Research
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The declining ability of tissues to repair or replace themselves and maintain their structure and normal function is called aging. Aging is caused by free radical that can induce the activation of elastase and collagenase. Ageratum conyzoides (L.) or known as Babadotan is a medicinal plant that has been reported to be a good source of antioxidants that also inhibit aging process. The purpose of this research is to evaluate the antioxidant and antiaging properties of Babadotan Ethanolic Extract (BEE). Franswoth method was used to determine the phytochemical assay of BEE. Measurement of 2,2-diphenyl 1-picrylhydrazyl (DPPH) scavenger was used for antioxidant assay, and inhibitory of elastase and collagenase activities was used for antiaging assay. The analysis of phytochemical compounds exhibited the presence of flavonoids, alkaloids, tannins, polyphenols, steroids and triterpenoids, monoterpenoids and terpenoids, and the absence of saponin. BEE has lower activity on DPPH scavenging activity (IC50 = 80.7 µg/mL) than quercetin (IC50 = 3.25 µg/mL). BEE exhibited lower elastase and collagenase inhibitory activity (IC50 = 45.35 ± 2.2 µg/mL and 55.07 ± 1.1 µg/mL, respectively) compared to quercetin (IC50 = 11.64 ± 0.67 µg/mL and 19.91 ± 0.46 µg/mL). Overall, BEE possesses antioxidant and antiaging activities, although the activities are lower than quercetin.