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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.
Arjuna Subject : -
Articles 477 Documents
 1   2   3   4   5 
The Distribution of MAP-2 Phosphorylation in Cerebral Cortex of Long-Tailed Monkey Fetuses (Macaca fascicularis) in the Last Trimester of Gestation Pangestiningsih, Tri Wahyu; Irawan, Vidya; Sulistiawati, Erni
Indonesian Journal of Biotechnology Vol 15, No 2 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

Memories are storage in cholinoceptive cells, the cells which are enriched with microtubule-associated protein 2 (MAP-2) that localized in the neuronal dendrite and the cell bodies. Phosphorylation of MAP-2 may increase memory with reduce stability of dendrite by altered dendrite length and lead new side-branches of neuronal as a neuronal plasticity processes in cerebral cortex. The aim of this research is to study the distribution of MAP-2 phosphorylation neurons in cerebral cortex of long-tailed macaques in the third semester of gestationalimmunohistochemically using avidin biotin conjugated complex method. Neurons MAP-2 phosphorylation immunoreactive were located in dendrites and cell bodies, mostly in pyramidal neurons of cerebral cortex. Intensity of MAP-2 phosphorylation immunoreactivity in layer V were stronger than another layer and the neurons that very intensely stained were the pyramidal cells in frontal and parietal lobes, that was suggested that neurons in this areas more responsive to neuroplasticity. From the results we concluded that MAP-2 phosphorylation already distributed in the cerebral cortex of long-tailed macaque fetuses at the last trimester of gestation, mostly in the pyramidal cells of layer V that is suggested plays a role for preparation of memoryformation.Keywords: fetus, long-tailed monkey, cerebral cortex, memory, MAP-2 phosphorylation
Identification of Pediococcus Strains Isolated from Feces of Indonesian Infants With in vitro Capability to Consume Prebiotic Inulin and to Adhere on Mucus ., Widodo; Anindita, Nosa Septiana; Taufiq, Tiyas Tono; Wahyuningsih, Tutik Dwi
Indonesian Journal of Biotechnology Vol 17, No 2 (2012)
Publisher : Universitas Gadjah Mada

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Abstract

The aim of this experiment was to identify isolates obtained from feces of Indonesian infants and to evaluate their capability as probiotics. Identification of isolates was carried out based on morphology, physiology and biochemical identifications, and molecular identification based on 16S rRNA sequence. Morphological and physiological identification was carried out based on Gram staining, shape, motility, spore formation and catalase production. Biochemical identifications based on production of CO2 and NH3 from glucose, the ability to grow on different temperature (10 and 45°C) and pH (4.4 and 9.6), and different salt concentration (6.5 and 18%). Probiotics capability of isolates was assayed on the ability to grow on low pH (pH 2.0), on different bile salts concentration (0.3; 0.5; 1.0 and 1.5%), the capacity to grow on media with inulin as the only carbon source, and in vitro adhesion ability on porcine mucin. Morphological, physiological and biochemical identification suggest that all of isolates belong to lactic acid bacteria. Further molecular identification of five isolates showedthat isolates AA, BE and BK were strains of Pediococcus acidilactici (similarity 99%), while isolate AP and AG were strains of Lactobacillus casei (similarity 99-100%). Probiotic assays showed that more than 80% of cells of Pediococcus acidilactici isolates AA, BE and BK were viable after grown on pH 2.0 for 90 min, and around 80% of cells from the same isolates were survived on media supplemented with bile salt 1.5% for 2 h. All of isolates had high adhesion capacity as seen by more than 75% of cells attached on pig gastric mucin. Investigationof isolates to grow on inulin showed Pediococcus acidilactici isolate BE was able to consume inulin as the only carbon source. It is concluded that Pediococcus acidilactici isolate BE was a candidate probiotics and subject to further in vivo evaluation using animal models to examine their beneficial health effects.Key word : Pediococcus acidilactici, Lactobacillus casei, human origin and probiotics.
Genetic Analysis of Glycoprotein Gene of Indonesian Rabies Virus Susetya, Heru; Naoto, Ito; Sugiyama, Makoto; Minamoto, Nobuyuki
Indonesian Journal of Biotechnology Vol 10, No 1 (2005)
Publisher : Universitas Gadjah Mada

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Abstract

The amino acid sequences of the Glycoprotein gene (G gene) of field rabies virus SN01-23 from Indonesiawas determined. This isolate showed homology of 93% in the ectodomain of the Glycoprotein gene to that of theRC-HL strain, which is used for production of animal vaccine in Japan. The high identity in the ectodomainbetween this field isolate and strain RC-HL suggest that the rabies animal vaccine used in Japan will be effectivefor rabies street viruses in Indonesia. Result of phylogenetic analysis using the nucleotide sequences of the Ggenes of rabies street viruses showed that SN01-23 from Indonesia is more closely related to a rabies virus fromChina than to viruses from Thailand and Malaysia. This genetic data and historical background suggest thatrabies viruses in China had been transferred to Indonesia through dogs brought by humans migrating from Chinato Indonesia.Keywords : Rabies virus, Glycoprotein gene, Ectodomain, Phylogenetic analysis
Detection and Cloning of a Gene Involved in Zwitermicin A Synthesis from Plant Growth Promoting Rhizobacteria of Bacillus sp CR64 Wahyudi, Aris Tri; Astuti, Rika Indri; Mubarik, Nisa Rachmania; Faulina, Sarah Asih
Indonesian Journal of Biotechnology Vol 15, No 1 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

Utilization of soil bacteria as biocontrol agent is becoming popular due to its valuable and effective mechanisms to suppress plant pathogenic microbes. We have previously isolated Bacillus sp, designated as Bacillus sp CR64, which exhibited effective plant growth promoting and antifungal activities. In this study, CR64 was examined in inhibiting the growth of Rhizoctonia solani, the causing agent of root rot disease. Partial sequence analysis of 16S rRNA gene revealed that this isolate similar with Bacillus cereus (94%). Furthermore, a gene designated zmaR was detected by means of specific amplification of DNA fragment approximately 950 bp. This fragment was then cloned onto pCRII-TOPO (3.9 kb) and sequenced using DNA sequencer ABI PRISM 310. Sequence analysis revealed that it had highest homology with the ZmaR protein (89% identity; 90% similarity) of B. thuringiensis serovar kurstaki (AAF82729.2). Alignment analysis with other ZmaR sequences from other antibiotic-producing Bacilli exhibited an almost fully conserved region within ZmaR sequences.Key words : PGPR, Bacillus sp CR64, Zwitermicin A, Cloning, Antifungal.
Cloning and Expression of ORF124 Koi Herpesvirus as a Vaccine ., Murwantoko; Pratiwi, Rarastoeti; Kawaichi, Masashi
Indonesian Journal of Biotechnology Vol 17, No 1 (2012)
Publisher : Universitas Gadjah Mada

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Abstract

Koi herpesvirus (KHV) which also known as Cyprinid herpesvirus 3 (CyHV-3), Koi herpes-like virus, and carp interstitial nephritis gill necrosis virus (CNGV), caused signifi cant morbidity and mortality in koi and common carp (Cyprinus carpio). The case fatality rate of this disease is 80–100%. Glycoprotein has been used for vaccine development as sub unit vaccine against viruses. The aim of this research was to clone and express membrane glycoprotein ORF124 KHV as a candidate of recombinant vaccine. ORF124 KHV gene was successfully cloned into pBSKS and sequenced. Result showed that ORF124 KHV (isolate from Indonesia) had 100 % similarity with Cyprinid herpesvirus 3 strain TUMST1 (from Japan), 99% similarity with Koi herpesvirus strain KHV-U (from USA) and Koi herpesvirus strain KHV-I (from Israel). Prediction analysis of T and B cell epitopes showed that ORF124 KHV protein had 14 and 11 T cell epitopes (IAd, Rothbard/Taylor pattern),and had 10 B cell epitopes, suggested that the protein can be used as a vaccine candidate. ORF124 gene has been expressed in Escherichia coli under pET32-a(+)vector.
Cytotoxicity of Buah Merah (Pandanus conoideus Lamk.) Extract on Breast Cancer Cell Line (T47D) Nuringtyas, Tri R; Pratama, Yoga; G, Galih; Wahyuono, Subagus; Moeljopawiro, Sukarti
Indonesian Journal of Biotechnology Vol 19, No 1 (2014)
Publisher : Universitas Gadjah Mada

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Abstract

Buah Merah (Pandanus conoideus Lamk.) has been extensively used to treat various diseases includingcancer. There are many varieties of buah merah and there was no scientifi c study comparing cytotoxicity ofdifferent varieties. The objective of this study was to investigate the cytotoxicity of three varieties of buah merahknown as Barugum, Maler and Yanggiru on breast cancer cell line (T47D). All samples were collected fromPapua, Indonesia. Each sample was extracted consecutively using three solvents chloroform, methanol andwater resulted to nine crude extracts. The cytotoxic activities were determined using MTT assay. The crudeextract showed the lowest IC50 was selected for further bioassay-guided fractionation. Fractionation was doneusing vacuum liquid chromatography coupled with preparative TLC to fi nd the active compounds. Severaldetection reagents were applied to TLC for identifi cation of the class of the potent compounds. The resultshowed that the potent extracts was obtained from Barugum methanol extract followed by Maler chloroformextract with IC50 value of 132.83 μg/ml and 139.72 μg/ml, respectively. All Yanggiru extracts did not showactivity. The bioassay-guided fractionation of Barugum and Maler extracts showed that the most potent fractioneluted by a mixture of hexane:ethyl acetate (75:25), was in Maler variety with IC50 value of 25,7 μg/ml, fourtimes higher than the most potent fraction of Barugum with IC50 value of 104,61 μg/ml. TLC analysis of themost potent fraction showed that the active compounds was class of terpene. Result of this study supportedthe utilization of buah merah Maler variety for breast cancer treatment.
Genetic Heterogenity Profile of Penaeus monodon Broodstock F1 Revealed by Mitochondria DNA-RFLP and RAPD Prastowo, Bambang Widyo; Rahardianti, Rahayu; Nur, Evi Maftuti; Taslihan, Arief
Indonesian Journal of Biotechnology Vol 12, No 1 (2007)
Publisher : Universitas Gadjah Mada

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Abstract

The genetic heterogeneity of Penaeus monodon broodstock F1 was evaluated using Restriction Fragment LengthPolymorphism (RFLP-mtDNA) and Random Amplified Polymorphic DNA (RAPD) analysis. The RFLP analysis wasconducted by amplifying 16SrDNA region and digested with restriction enzyme Nde II. According to the RFLPanalysis, heterogeneity value of P. monodon F1 broodstock population is 0,0422; male F1 population is 0,0613 andfemale F1 population is 0,1252. The primer OPA2 was used in RAPD analysis. According to the RAPD analysis,heterogeneity value of P. monodon F1 broodstock population is 0,0417; male F1 population is 0,0653 and female F1population is 0,1104. The results of this research showed that either RFLP or RAPD can be used as a family specificmarker for Penaeus monodon.Key words : Penaeus monodon, RFLP, RAPD, heterogeneity, genetic marker
Ethanolic Extract of Hedyotis corymbosa L. Increases Cytotoxic Activity of Doxorubicin on MCF-7 Breast Cancer Cell Haryanti, Sari; Junedi, Sendy; Meiyanto, Edy
Indonesian Journal of Biotechnology Vol 14, No 1 (2009)
Publisher : Universitas Gadjah Mada

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Abstract

Hedyotis corymbosa L. with ursolic acid as the main compound is one of the plants that has been used for traditional medicine including to cure breast cancer disease. The aim of this research is to examine the cytotoxic activity of rumput mutiara herb ethanolic extract (ERM) and its effect in combination with doxorubicin against MCF-7 breast cancer cell line as cell model of doxorubicin resistance. Hedyotis corymbosa L. herb powder extraction was done by maceration using ethanol 96% then the extract is detected for ursolic acid content. Cell viability assay of ERM, doxorubicin and  the combination of ERM and doxorubicin treatments were carried out by MTT assay to determine IC50 and CI (Combination Index). Cell cycle distribution was determined by flowcytometry. Apoptosis assay was performed by ethidum bromide-acridine orange DNA staining method. Investigation on Bcl-2 expression was determined by immunocytochemistry method. Thin Layer Chromatography of ERM had similar Rf with ursolic acid standard: 0,6. ERM and doxorubicin inhibited cell growth against MCF-7 with IC50  of 77 µg/mL and 349 nM (0,19 µg/mL) respectively. Combination of ERM and doxorubicin showed synergistic effect (CI 0.66-0.99). Combination of 25 ìg/mL ERM- 200 nM doxorubicin induced apoptosis and decreased Bcl-2 expression but showed no cell accumulation on cell cycle. Doxorubicin induced high cell accumulation in G2/M phase, but ERM at the concentration of 25 ìg/mL had a low effect in G1 phase, and ERM IC50 did not induce cell accumulation otherwise apoptosis. These results concluded that the apoptosis mechanism of combination doxorubicin-ERM is mediated by cell cycle arrest and non cell cycle arrest. Therefore ERM has a potential activity to be developed as co-chemotherapeutic agent.  
Effect of Oxidative Stress on AhpC Activity and Virulence in katG Ser315 Thr Mycobacterium tuberculosis Mutant Rintiswati, Ning; Wibawa, Tri; Asmara, Widya; Soebono, Hardyanto
Indonesian Journal of Biotechnology Vol 16, No 2 (2011)
Publisher : Universitas Gadjah Mada

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Abstract

AbstractMycobacterium tuberculosis strains resistance to INH is mainly caused by the alteration in several genesencoding the molecular targets. Mutation of katG at codon 315 especially Ser315Thr are responsible forINH resistance in a large proportion of TB cases. The aim of this study is to evaluate the influence of stressoxidative on AhpC activity of katG Ser315Thr of M.tuberculosis, and to find out the relation of AhpC and thevirulence of this mutant. The study design was laboratoric experimental, subjects of study were M.tuberculosisINH resistance strains, and the treatment were serial dose of H2O2. Eighty five M.tuberculosis INH resistantclinical strain were screened for mutation of katGSer315Thr by PCR/RFLP and characterized on the basis ofphenotypic properties (catalase activity and AhpC activity). AhpC activity of katG Ser315Thr M.tuberculosisstrains in response to oxidative stress condition was evaluated by culturing the strains on liquid culturemedium containing 1mM H2O2. To ascertain role of AhpC in the virulence of katGSer315Thr mutant strains, themutants were infected into human macrophages culture, and several indicator of virulence were observed (i.e:replication competence, and apoptosis induction on human macrophages). The results showed that katG Ser315Thr were identified in 23 (27,05%) of 85 INH resistance strains, all mutant strains had decrease of catalaseactivity. AhpC activity of katG Ser315Thr of M.tuberculosis increased significantly with increase of hydrogenperoxide dose. In addition , it has been shown that increased AhpC activity related to replication ability ofmutant, and reduction of apoptosis macrophages induction significantly. We conclude that the productionof AhpC of katG Ser315Thr M.tuberculosis induced by oxidative stress. There was a role of AhpC in virulenceof the M.tuberculosis katG Ser315Thr strains by replication capability and macrophages apoptosis.Keywords : katG Ser315Thr Mycobacterium tuberculosis- oxidative stress - AhpC - virulence
Agrobacterium-Mediated Stable Transformation of Medicinal Plant Andrographis paniculata Callus Expressing β-glucuronidase (GUS) Gene Marwani, Erly; Tangapo, Agustina; Dwivany, Fenny Martha
Indonesian Journal of Biotechnology Vol 18, No 2 (2013)
Publisher : Universitas Gadjah Mada

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Abstract

This study was carried out to establish a stable genetic transformation in callus culture of Andrographispaniculata mediated by Agrobacterium tumefaciens. The leaf disks of A. paniculata were infected with A. tumefaciensLBA4404 carrying a binary vector pCAMBIA1304 that contain β-glucuronidase (GUS) and hygromycinphosphotransferase (hpt) genes. The infection was conducted by dipping method for one hour, followed byco-cultivation in the dark for three days. To examine transient GUS expression, the co-cultivated leaf disks wereassayed for β-glucuronidase activity and to obtain stable transformed callus, the co-cultivated leaf disks wereselected on the callus induction medium which contain 20 mg/l hygromycin for selection. The transformedcallus was periodically subcultured every three weeks into the fresh selection medium over the 15 weeksperiod. To test a stable transformation, the callus was subjected to PCR analysis for GUS gene detection. Theresults indicated that the co-cultivated leaf disks expressed GUS activity and proliferated to produce callus onthe selective medium. Analysis of PCR on the transformed callus indicated the presence 976 bp fragment thatconfi rmed the presence of β-glucuronidase gene. These fi ndings imply that the β-glucuronidase was stablyintegrated into A. paniculata callus culture.Keywords: Andrographis paniculata, Agrobacterium tumefaciens, andrographollide, transformed callus,β-glucuronidase gene.

Page 3 of 48 | Total Record : 477

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