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INDONESIA
Indonesian Journal of Biotechnology
Published by Universitas Gadjah Mada
ISSN : 08538654     EISSN : 20892241     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology
The Indonesian Journal of Biotechnology (IJBiotech) is an open access, peer-reviewed, multidisciplinary journal dedicated to the publication of novel research in all aspects of biotechnology, with particular attention paid to the exploration and development of natural products derived from tropical—and especially Indonesian—biodiversity. IJBiotech is published biannually and accepts original research articles featuring well-designed studies with clearly analyzed and logically interpreted results. A strong preference is given to research that has the potential to make significant contributions to both the field of biotechnology and society in general.
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Articles 7 Documents
 1 
Search results for , issue "Vol 27, No 2 (2022)" : 7 Documents clear
Cytotoxic effects of parijoto (Medinilla speciosa Reinw. Ex. Bl.) methanol extract combined with cisplatin on WiDr colon cancer cells through apoptosis induction Anif Nur Artanti; Fea Prihapsara; Ranita Kumalasari Susanto
Indonesian Journal of Biotechnology Vol 27, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.63766

Abstract

Parijoto (Medinilla speciosa Reinw. Ex. Bl.) is a medicinal plant with cytotoxic effects on cancer cells in vitro. As only a limited number of studies have reported the effect of parijoto on colon cancer cells, this study initially aimed to measure the total flavonoid levels and potential cytotoxic effects of parijoto methanol extract (PME) through cell viability assays and expression of the apoptotic protein on WiDr colon cancer cells as a model. PME cytotoxic activity was determined by conducting a cytotoxicity test on WiDr colon cancer cells using the MTT assay. The synergistic cytotoxic effects of the PME and cisplatin were tested to obtain the combination index (CI) value. Apoptosis was analyzed by flow cytometry, and the apoptotic protein expression was observed by immunocytochemical tests. Furthermore, quercetin as a major flavonoid in PME was measured using a UV–Vis spectrophotometer. The results showed that PME had a moderate cytotoxic activity with an IC50 of 198.64±1.6 µg/mL, whereas the IC50 of cisplatin was 2.34±0.7 µg/mL. The PME with cisplatin combination test showed a strong synergistic effect with a CI value of <1 (0.1‐0.4). The combination showed increased apoptosis properties compared to PME treatment alone. In addition, immunocytochemistry showed that PME alone or in combination with cisplatin increased the pro‐apoptosis proteins (p53 and caspase‐9) and suppressed Bcl‐2 expression. Moreover, the cell viability value increased as the PME concentration decreased. The administration of PME led to changes in cell morphology, lower cell density, and a decreasing number of living cells. Therefore, the combination of PME and cisplatin had a strong synergistic effect in inducing apoptosis.
Purification and characterization of thermostable serine alkaline protease from Geobacillus sp. DS3 isolated from Sikidang crater, Dieng plateau, Central Java, Indonesia Sotharith Phon; Andriati Ningrum; Lucia Dhiantika Witasari
Indonesian Journal of Biotechnology Vol 27, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.65822

Abstract

Thermostable proteases that optimally withstand the high‐temperature conditions of thermophilic bacteria could be produced and purified, which would be highly beneficial for use in industry. Geobacillus sp. is a thermophilic bacterium that can be found in various environmental conditions. The goal of this study was to isolate and characterize thermostable serine protease that had been produced by thermophilic Geobacillus sp. strain DS3. The proteolytic index was measured in a solid medium. The expression of protease was optimized by Geobacillus sp. DS3 at 50 °C for 18 h. Targeted protease was purified using ammonium sulfate (40‐60%) and DEAE Sephadex A‐25 resin. Using SDS‐PAGE, the molecular weight of the enzyme was predicted to be around 32 kDa. Purified thermostable protease was highly activated at 70 °C, pH 9.6 stable for 1 h, and inhibited by PMSF. Therefore, this enzyme is classified as a thermostable alkaline serine protease. Its kinetic study revealed specific activity of 0.41 U/mg (Vmax) and 0.25 mg/mL (KM). Overall, a thermostable alkaline serine protease from Geobacillus sp. DS3 showed high activity at high temperatures and alkaline pH, which is vital for application in industries such as leather processing and detergent formulation.
Effects of different parameters on cellulase production by Trichoderma harzianum TF2 using solid‐state fermentation (SSF) Jeffrey Lim Seng Heng; Halizah Hamzah
Indonesian Journal of Biotechnology Vol 27, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.66549

Abstract

Solid‐state fermentation is one of the easiest and cheapest methods for producing microbial bioactive com‐ pounds. Trichoderma harzianum has long been recognised as one of the potential fungi for this purpose. Trichoderma sp. were isolated from banana rhizosphere using the soil dilution method and later screened for their ability to produce cellulases using filter paper activity (FPase) and the carboxylmethyl cellulase (CMCase) test. Trichoderma sp. were also subjected to one factor change at a time to determine the effects of different parameters on cellulase production. It was observed that T. harzianum TF2 showed the ability to produce higher cellulase activity when wheat bran was used as the substrate. The results showed that 38.5 U/g of cellulase was produced with the use of wheat bran coupled with an incubation temperature of 28 °C and moisture content of 60%. T. harzianum TF2 showed good potential for use as a culture for cellulase production in this study due to its higher cellulase production under solid‐state fermentation, with the possibility of its application to industry.
Anti‐proliferative effects of pentagamaboronon‐0‐sorbitol on HER2‐overexpressing breast cancer cells Lailatul Qodria; Rohmad Yudi Utomo; Adam Hermawan; Edy Meiyanto
Indonesian Journal of Biotechnology Vol 27, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.67549

Abstract

HER2‐positive breast cancer is an aggressive form of the disease that is associated with poor prognosis and chemo‐resistance. As such, investigation continues into the development of a new HER2‐targeted drug for breast cancer. This study investigated the anti‐proliferative activities of pentagamaboronon‐0‐sorbitol (PGB‐0‐So) in HER2‐overexpressing breast cancer (MCF‐7/HER2) cells. The cytotoxicity of PGB‐0‐So was assessed via MTT assay. Flow cytometry with propidium iodide and annexin‐V‐FITC staining was conducted to investigate the mechanism of PGB‐0‐So in inhibiting the proliferation of MCF‐7/HER2 cells. Finally, FACS analysis with 2′,7′–dichlorofluorescin diacetate staining was performed to examine intracellular ROS production. PGB‐0‐So exerted cytotoxicity towards MCF‐7/HER2 breast cancer cells with an IC50 value of 36 μM. PGB‐0‐So induced S‐phase arrest and apoptosis in MCF‐7/HER2 cells. Moreover, PGB‐0‐So could increase intracellular ROS production in MCF‐7/HER2 cells. PGB‐0‐So exerted anti‐proliferative activity towards MCF‐7/HER2 cells. This compound may be developed as a chemotherapeutic agent against HER2‐overexpressing breast cancer.
Expression of cytokinin responsive and ethylene biosynthesis genes in rice callus with different regeneration rates Syafira Fatihatul Husna; Parawita Dewanti; Bambang Sugiharto; Wahyu Indra Duwi Fanata
Indonesian Journal of Biotechnology Vol 27, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.70264

Abstract

This study aimed to investigate the correlation between callus regeneration rate and the expression of several genes responsible for cytokinin response and ethylene biosynthesis in the Ciherang, Mentik Wangi Susu, Hwayoung and Tarabas rice varieties. The callus regeneration rate of each rice variety was in vitro tested using N6 media, while the gene expression during the callus regeneration stages was examined using quantitative real‐time PCR (qRT‐PCR). Our results showed that the callus of Ciherang and Mentik Wangi Susu showed earlier green spot formation that then turned brown at a later stage, resulting in a low regeneration rate. While Hwayoung and Tarabas showed late green spot formation, high shoot regeneration was observed in both calluses. Gene expression analysis of regeneration media‐grown calluses showed that two cytokinin‐responsive genes, OsRR2 and OsRR6, were highly expressed in the Ciherang and Hwayoung callus, respectively. We also observed that ethylene biosynthesis genes such as OsACS1 and OsACO1 were highly expressed in the Mentik Wangi Susu and Hwayoung callus, respectively. Moreover, the expression of OsBBM1 was high in Hwayoung and Tarabas. Thus, the positive correlation between the expression of cytokinin‐responsive and ethylene biosynthesis genes with somatic embryogenesis activity likely depends on the induction level of OsBBM1.
Resistance gene expression in selected Indonesian pigmented rice varieties against infection by Xanthomonas oryzae pv. oryzae Nur Elia Nadhira; Ali Wafa; Wahyu Indra Duwi Fanata; Hardian Susilo Addy
Indonesian Journal of Biotechnology Vol 27, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.70445

Abstract

Rice (Oryza sativa L.) production is limited by bacterial leaf blight (BLB), caused by Xanthomonas oryzae pv. oryzae (Xoo). For decades, researchers have attempted to control this disease by growing plants with blight‐resistant Xa genes. Genetic resources often vary between rice varieties, and there is little information about the genetic resources of the pigmented rice varieties widely grown in Indonesia and their resistance genes against Xoo. The purpose of this study was to determine the expression of Xa genes in pigmented rice such as Inpari 24 and Cempo Merah (red‐pigmented) along with Hitam Bantul (black‐pigmented) and white rice varieties IR64 and Ciherang, and to evaluate their resistance to BLB. All varieties carried the Xa4, Xa10 and xa13 genes but varied in the Xa1, Xa7 and Xa21 genes. The rice varieties expressed some of these genes only after inoculation with Xoo. Disease assessment categorised the three different pigmented rice varieties as resistant (Ciherang, Cempo Merah and Hitam Bantul), while IR64 (white) and Inpari 24 (red) were moderately resistant. There was no specific pattern of Xa genes possession, quality of expression or resistance level to X. oryzae pv. oryzae. Therefore, when breeding plants, the selection of parental variety must be considered in terms of the possession and expression of Xa genes such as Xa10 as a molecular marker for resistance.
Network pharmacology of black cumin (Nigella sativa L.) as a candidate of OMAI in colorectal cancer: in silico study Firzannida Firzannida; Sakti Bagaskara; Savana Sonia Savira; Aufa Fadnurrahim; Siti Rofida
Indonesian Journal of Biotechnology Vol 27, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.70699

Abstract

Colorectal cancer is the third most common cancer globally and the second leading cause of cancer‐related deaths. The management of colorectal cancer requires consideration of various factors due to the non‐selectivity of drugs, meaning that highly effective treatment with lower side effects is needed. Black cumin (Nigella sativa L.) contains thymoquinone and various other metabolites with potential as anticancer effects. The involvement of various genes and the difficulty of drug development have led to a ashift in the drug development paradigm towards plant‐based medicine that is both multicomponent and synergistic in supporting the resulting pharmacological effects. Network pharmacology can predict the synergistic effect of a multicomponent approach. This study aimed to predict the network pharmacology of black cumin as a candidate for OMAI (“Obat Modern Asli Indonesia”, Indonesian‐origin modern medicine) in colorectal cancer. This research was an in silico study using various ethnobotanical databases and software. The results show that seven metabolites in black cumin are correlated with ten surface receptor proteins, 30 intracellular proteins, and mechanisms involving six colorectal cancer signaling pathways. This result indicates that Nigella sativa L. has potential in OMAI and can be a reference for the development of cancer treatment, especially for colorectal cancer.

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