Articles

Found 3 Documents
Search

Identification of BSA B1 Bacteria and Its Potency of Purified Cellulase to Hydrolyze Chlorella zofingiensis Janatunaim, Rifqi Zahroh; Hamid, Radhiyah Mardhiyah; Christy, Ghea Putri; Purwestri, Yekti Asih; Tunjung, Woro Anindito Sri
Indonesian Journal of Biotechnology Vol 20, No 1 (2015)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.663 KB) | DOI: 10.22146/ijbiotech.15277

Abstract

Cellulase has been widely used as biocatalyst in industries. Production of cellulase from microorganismshas many advantages such as short production time and less expense. Our previous study indicated that oneof cellulolytic bacteria from digestive tract of milkfish (Chanos chanos), namely BSA B1, showed the highestcellulase activity. The objective of this study was to determine the phylogenetic of BSA B1 strain using 16SrRNA gene sequence. Furthermore, this study also determine the specific activity of purified cellulase from BSAB1 strain and its potency to hydrolyze Chlorella zofingiensis cellulose. Cellulase was purified using ammoniumsulphate precipitation, dialysis, and ion exchange chromatography. The purified cellulase was used to hydrolyzecellulose of C. zofingiensis. The result demonstrated that BSA B1 strain was closely related with Bacillus aeriusand Bacillus licheniformis. The specific activity of the crude enzyme was 1.543 U mL-1; after dialysis was 4.384 UmL-1; and after chromatography was 7.543 U mL-1. Purified cellulase exhibited activity in hydrolyzed both CMCand C. zofingiensis. Compared to commercial cellulase, purified cellulase had lower activity in hydrolyzed CMCbut higher activity in hydrolyzed C. zofingiensis. Ethanol dehydration could potentially increase the reducingsugar yield in cellulose hydrolysis when used appropriately. Morphology of C. zofingiensis cell has changedafter incubation with cellulases and ethanol dehydration indicated degradation of cell wall.
Black Rice Bran Extracts and Fractions Containing Cyanidin 3-glucoside and Peonidin 3-glucoside Induce Apoptosis in Human Cervical Cancer Cells Pratiwi, Rarastoeti; Tunjung, Woro Anindito Sri; Rumiyati, R.; Amalia, Alfi Rizqi
Indonesian Journal of Biotechnology Vol 20, No 1 (2015)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (234.334 KB) | DOI: 10.22146/ijbiotech.15271

Abstract

Anthocyanin of pigmented rice inhibits the growth of cancer cells. The cytotoxicity and apoptosisinducing properties of local black rice (cv Cempo Ireng) extracts and fractions, which contain anthocyaninincluding cyanidin 3-glucoside and peonidin 3-glucoside, on human cervical cancer cell line (HeLa cells) hasbeen evaluated. The pigmented rice bran was extracted and fractionated using methanol-HCl. The MTT testwas performed on HeLa cell cultures to observe the IC50 value. Preparative TLC was performed to obtain thefractions of black rice bran. Cyanidin 3-glucoside and peonidin 3-glucoside were identified in the pigmentedrice bran extract and fractions using UHPLC. Flowcytometry analysis was performed to measure the percentageof apoptotic cells. Our results suggest that the fractions are more toxic than the methanolic crude extract withIC50 values of 85.95 ± 5.56 μg/mL (the lowest one) and 408.13 ± 51.9 μg/mL, respectively. The concentration ofcyanidin 3-glucoside and peonidin 3-glucoside in the methanolic extract were 1.89 and 0.84 μg/mg, respectively.The apoptosis induction by fractions F2 and F4 (52 and 55%) were significantly higher compared to fractionF3 and F5 (30 and 33%) and doxorubicin (21%). Cyanidin 3-glucoside was detected in F4 (0.14 μg/ml) whilepeonidin 3-glucoside in F2 (0.012 μg/ml), however both were not detected in F3 and F5.
Active Fractions of Black Rice Bran cv Cempo Ireng Inducing Apoptosis and S-phase Cell Cycle Arrest in T47D Breast Cancer Cells Pratiwi, Rarastoeti; Amalia, Alfi Rizqi; Tunjung, Woro Anindito Sri; Rumiyati, Rumiyati
Journal of Mathematical and Fundamental Sciences Vol 51, No 1 (2019)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (807.141 KB) | DOI: 10.5614/j.math.fund.sci.2019.51.1.4

Abstract

Indonesian black rice cv Cempo Ireng was evaluated for cancer prevention using a T47D cell line model. Methanolic extract of black rice bran (BRB) showed cytotoxicity with an IC50 of 522.13 µg/ml. This result was in contrast to water extract of BRB, which yielded an IC50 of more than 6000 µg/ml. From the methanolic extract of BRB, its 6 fractions were found from the preparative TLC performance, with Rf values ranging from 0 to 0.97. According to the MTT assay of all fractions, fraction 3 (F3) had the lowest IC50 (60.17 ± 1.72µg/ml), while fraction 2 (F2) had an IC50 of 64.3 ± 0.61µg/ml. However, F2 showed the highest induction of apoptosis, i.e. about 75.39 ± 0.43% compared to the T47D cells without treatment (control) (about 8.39 ± 0.16%) and with doxorubicin treatment (about 41.30 ± 0.08%). Furthermore, fraction 5 (F5) not only induced apoptosis but also increased the S-phase arrest percentage (60.36 ± 2.07%), which was significantly higher than for the other treatments. Therefore, each fraction of BRB showed different cytotoxic responses to T47D cells.