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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 5 Documents
 1 
Search results for , issue "Vol 30, No 4 (2025)" : 5 Documents clear
Anti‐inflammatory properties of conditioned medium from human Wharton’s jelly mesenchymal stem cells Azis, Rizal; Widowati, Wahyu; Gunanegara, Rimonta Febby; Kusuma, Hanna Sari Widya; Triharsiwi, Dwi Nur; Hadiprasetyo, Dhanar Septyawan; Gondokesumo, Marisca Evalina; Mars, Nicholas
Indonesian Journal of Biotechnology Vol 30, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.107035

Abstract

Acute respiratory distress syndrome (ARDS) is a critical respiratory dysfunction triggered by intense in‐ flammation, microvascular damage, and increased epithelial and pulmonary vascular permeability. Human Wharton’s jelly mesenchymal stem cells (hWJMSCs) possess regenerative and anti‐inflammatory activities through the cytokines, chemokines, and growth factor secretion. The development of anti‐inflammatory agents derived from hWJMSCs has become one of the therapeutic solutions. Instead of direct cell use of hWJMSCs, their conditioned medium (CM) provides a cell‐free approach that delivers bioactive factors while minimizing the risks associated with stem cell transplantation. This study aims to measure the levels of vascular endothelial growth factor‐α (VEGF‐α), epidermal growth factor‐β (EGF‐β), interleukin‐10 (IL‐10), and hepatocyte growth factor (HGF) in CM‐hWJMSCs under non‐starvation and starvation conditions (24, 48 and 72 hours) using ELISA. The anti‐inflammatory potential of these factors was then analyzed through molecular docking with pro‐inflammatory cytokines. VEGF‐α, EGF‐β, IL‐10 and HGF levels were measured across all conditions. VEGF‐α ranged from 2590.37 to 3613.92 ng/mg protein; EGF‐β 347.01–504.43 ng/mg; IL‐10 302.59–729.28 pg/mg; and HGF 1747.20–2903.52 ng/mg. The molecular docking revealed strong binding between VEGF‐α, EGF‐β, IL‐10 and HGF with pro‐inflammatory cytokines, namely IL‐1β, IL‐6 and TNF‐α. VEGF‐α had the strongest bond with TNF‐α (–1162.3 kJ/mol), while EGF‐β formed the most hydrophobic and hydrogen interactions. The findings suggest that CM‐hWJMSCs, enriched with anti‐inflammatory and regenerative cytokines, may serve as a promising candidate for modulating the inflammatory pathways involved in ARDS pathogenesis. Longer starvation increased the secretion of VEGF‐α, EGF‐β, IL‐10 and HGF. These factors are known to promote angiogenesis, regulate immune responses, and protect against epithelial injury, thereby supporting the anti‐inflammatory and regenerative potential of hWJMSCs‐CM for ARDS therapy.
Metagenomic detection and biochemical characterization of a Streptomyces tyrosinase from Mesopotamian marsh soils: Implications for phenolic turnover Altaee, Nadia; Mahdi, Oras Abdulsayed; Sadeq, Farah Mohammed Saeed
Indonesian Journal of Biotechnology Vol 30, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.109403

Abstract

Wetland soils in southern Iraq store large carbon pools and contain abundant phenolics that can modulate microbial decomposition. In this study, we investigate bacterial tyrosinases (TYRs), type III copper enzymes that oxidize mono‐ and diphenols, in Mesopotamian marsh soils using a combined metagenomic and biochemical approach. Degenerate primers targeting conserved CuA/CuB motifs recovered diverse partial tyr fragments affiliated with Proteobacteria and Actinobacteria. From one sample, we amplified the full melC operon from a Streptomyces lineage; expressed the tyrosinase in E. coli; and purified the enzyme (SZTYR). SZTYR displayed an alkaline pH optimum (~9); retained activity up to ~70 °C; and preferentially oxidized diphenols (e.g., L‐DOPA, dopamine) over monophenols. The enzyme also acted on phenolics relevant to peat/wetland matrices (e.g., caffeic, protocatechuic, p‐coumaric and gallic acids). The results document TYR genetic diversity in Iraqi marsh soils and establish the biochemical profile of an alkaline‐adapted Streptomyces tyrosinase. While ecosystem‐level impacts were not measured, our findings motivate field‐scale assessments of in situ TYR activity, phenolic pools and oxygen/pH dynamics to evaluate potential consequences for phenolic turnover and carbon cycling in aridifying wetlands.
Enzyme and hormone activities related to phosphorus uptake limitation in oil palm (Elaeis guineensis Jacq.) Maryanto, Sigit Dwi; Rohman, Randi Abdur; Roberdi, Roberdi; Nuringtyas, Tri Rini; Purnomo, Purnomo; Rachmawati, Diah; Putra, Eka Tarwaca Susila; Utomo, Condro; Liwang, Tony; Daryono, Budi Setiadi
Indonesian Journal of Biotechnology Vol 30, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.109941

Abstract

Phosphorus (P) is an essential element for oil palm growth and development. Acid phosphatase (Apase) and Pti‐interacting serine/threonine kinase are two enzymes which enzymes confirmed to be related to P‐uptake in oil palm, therefore their activities in oil palm treated with P‐limitation need to be quantified. Acid phosphatase is believed to be induced by P‐deprivation. Conversely, the Pto‐interaction (Pti) serine/threonine kinase activity is associated with abiotic stress. The aim of this study was to quantify of activities of two selected enzymes and phytohormone content in oil palm‐clones in the P‐limitation condition. Two oil palms genotypes were treated with three P dosages i.e. 0% (v/v), 4.67% (v/v), and 14.02% (v/v) represented as starvation, deficiency, and optimum condition, respectively. The activity of these two enzymes was quantified in mitochondria and cytoplasm using spectrophotometry and modified dot‐blot methods, while abscisic acid, indole acetic acid and gibberellic acid content was quantified using ultra performance liquid chromatography (UPLC). The result showed that the Apase activity in P‐optimum was higher than starvation and deficiency in leaf and root tissues in both genotypes, whereas Pti serine/threonine kinase activity was higher in prolific than non‐prolific genotypes in P‐deficient dosage. Furthermore, abscisic acid content was higher in prolific than non‐prolific genotypes in starvation and deficient, whereas other hormone contents were similar. Association study showed that prolific was separated with non‐prolific ones at different doses of P. Finally, the prolific genotype is more adaptable with P deficiency.
Evaluation of synthetic‐gene recombinant LipL32 antigen for IgM ELISA detection of Leptospira infection Widiastuti, Dyah; Paramita, Dewi Kartikawati; Murwanti, Retno; Kusrini, Ina; Wijayanti, Nastiti; Haryanto, Aris
Indonesian Journal of Biotechnology Vol 30, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.111102

Abstract

Leptospirosis presents with nonspecific clinical features and requires time‐consuming laboratory tests for gold standard diagnosis. This study aims to design and characterize the recombinant LipL32 from synthetic gene and assess its performance as an antigen for detecting leptospirosis. The antigen was developed by cloning the LipL32 gene conserved portion of Leptospira interrogans serovar Icterohaemorrhagiae strain Langkawi. The immunoinformatic was used to characterize the developed rLipL32. Western blot results using anti‐histidine revealed a band of rLipL32 protein at ~40 kDa. Subsequently, it was used to examine the IgM antibody on human sera by using ELISA. The IgM‐LipL32 ELISA was evaluated using 67‐positive and 25‐negative sera and compared with a commercial ELISA. With a cut‐off value of 0.8, it showed 85.7% sensitivity, 83.3% specificity, a 48% positive prediction value (PPV), and 97% negative prediction value (NPV), indicating modest performance compared to existing commercial kits. The rLipL32 is a potential antigen for detecting IgM using ELISA; however, for use in low incidence areas, a confirmation test is crucial.
Orchid‐associated endophytic Bacillus mediates Fusarium suppression and promotes in vitro regeneration of banana plantlets via culture supernatant Sasongko, Aries Bagus; Purwestri, Yekti Asih; Daryono, Budi Setiadi; Subandiyah, Siti
Indonesian Journal of Biotechnology Vol 30, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijbiotech.111727

Abstract

The application of Fusarium‐antagonistic endophytic bacteria with plant growth‐promoting traits offers an effective method to enhance the success of banana plantlet tissue culture while combating Fusarium wilt disease caused by Fusarium oxysporum f.sp. cubense Tropical Race 4 (FocTR4) (VCG 01213). This study evaluates the endophytic bacterium AP3311, isolated from healthy banana roots in direct association with orchid roots. AP3311 exhibited strong antagonism toward FocTR4, hyphal colonization ability, and multiple growth‐promoting activities, including phosphate solubilization, nitrogen fixation and auxin production. 16S rRNA gene sequencing identified that AP3311 belongs to the genus Bacillus, while metabarcoding analysis revealed that Bacillus species dominate the root microbiomes of both bananas and orchids. The bacterial supernatants stimulated root development and leaf growth in vitro. Metabolomic profiling indicated that antimicrobial compounds, together with plant growth regulators, promoted both root and shoot growth. Overall, the research demonstrates that Bacillus sp. AP3311 and its supernatants are valuable components in banana tissue culture, providing the dual benefits of plant growth promotion and effective disease control.

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