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Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Published by Universitas Brawijaya
ISSN : 20875517     EISSN : 25274376     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
The Journal of Tropical Life Science (JTLS) provides publication of full-length papers, short communication and review articles describing of new finding or theory in living system, cells and molecular level in tropical life science and related areas. The journal publishes articles that report novel findings of wide Tropical Life system phenomenon in the areas of biodiversity, agriculture, fisheries, health, husbandry, forestry and environmental technology. JTLS has 1 volume with 3 issues per year.
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Articles 14 Documents
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Search results for , issue "Vol. 9 No. 1 (2019)" : 14 Documents clear
Fecal Calprotectin Level of Breast Milk-Formula vs Formula Feeding in Preterm and Low Birth Weight Neonates with Necrotizing Enterocolitis Ditya Arisanti; Satrio Wibowo
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Abstract

Necrotizing enterocolitis (NE) is inflammatory disease and its prevalence was increase in preterm and low birth weight (LBW) neonates. This study was aimed to investigate the differences of fecal calprotectin level in breast milk-formula vs formula feeding infants in preterm and low birth weight neonates with necrotizing enterocolitis. There are 32 preterm and LBW neonates with NE were divided into two group (breast milk-formula and formula only feeding group). Fecal calprotectin level was measured using ELISA method. This study showed that fecal calprotectin level in breast milk-formula feeding group was insignificantly lower as compared to formula feeding group (independent t-test, p = 0.503). Further analysis showed that fecal calprotectin level was negatively correlated with patient’s outcome (Spearman correlation test, p = 0.03, r = 0.512). We concluded that fecal calprotectin level in breast milk-formula feeding group was insignificantly lower as compared to formula feeding only group in preterm and low birth weight neonates diagnosed with necrotizing enterocolitis. There was negative correlation between fecal calprotectin level and patient’s outcome.
Resistance of Aedes as a Vectors Potential for Dengue Hemorrhagic Fever (DHF) in Semarang City, Indonesia Martini Martini; Retno Hestiningsih; Bagoes Widjanarko; Susiana Purwantisasari
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.09.01.12

Abstract

Dengue Hemorrhagic Fever (DHF) is a significant health problem in Semarang, Indonesia. A Certain type of insecticides has been widely applied beginning in the last decade as an effort to control the mosquito vectors of dengue virus. This practice could lead to increased resistance in mosquito populations toward these types of insecticides. This research aimed to describe the resistance status of Aedes sp. populations in Semarang. A cross-sectional design study was conducted in 2015, with Aedes sp. populations sampled in several villages of Semarang. Field strains of Aedes sp. eggs were collected using ovitraps and larvae from entomological surveys. Mosquito adults were raised from the collected eggs and larvae under standard conditions and used for biochemical assays. ELISA examined Aedes sp. resistance status. The results showed that there was monooxygenase activity in Aedes sp. populations. In quantitative terms, 77.8% of mosquito samples showed an Optical Density (OD) more than the cut-off point (0.165). Resistance to synthetic pyrethroid insecticide in Aedes sp. mosquitoes population in Semarang may be caused by the mechanism of monooxygenase detoxification enzymes in particular. This case indicated that Aedes sp. has a high capacity as a vector to transmit the dengue virus in Semarang.
Potential of Wild Yeast from Banana to Control Colletotrichum musae Fungi Caused Anthracnose Disease and Its Short Antagonistic Mechanism Assay Anton Muhibuddin; Antok Wahyu Sektiono; Dewi Maratus Sholihah
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Abstract

Anthracnose caused by Colletotrichum musae is one of several important disease in banana fruit. An effective, cheap, and safe control method are necessary as a postharvest disease control alternative. This research aimed to obtain and identify wild yeast from banana which was isolated from its peel that has antagonist ability effectively in controlling anthracnose disease of banana fruit.  This research was started with an isolation of C. musae and yeast from banana, followed by in vivo assay with count percentage antagonist level, slide culture, and in vivo assay to know pathogen incubation stage and incident disease level. The yeast that isolated from ambon variety was Candida sp. and Pichia sp. Metchnikowia sp. from kepok variety respectively.
Ambon Banana-Tree Sap stimulated Endothelial Cell Migration in Human Umbilical Vein Endothelial Cells (HUVECs) Induced with Inflammatory Mediator IL-1 Provisia Marthalita Yuning Wulan; Maria Juliana Dorothy; Resha Alinda; Kristianingrum Dian Sofiana; Bunga Prihardina; Nur Permaasari; M. Aris Widodo
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Abstract

Ambon banana-tree (Musa paradisiaca var.sapientum) sap (ABT sap) contains active substances that can stimulate the wound healing process such as: flavonoid, saponin, ascorbic acid. Those substances are needed in an important phase of wound healing called angiogenesis through activation of Vascular Endothelial Growth Factor (VEGF) pathway that stimulates actin reorganization in endothelial cell migration and proliferation. The aim of this study is to evaluate the effectiveness of banana-tree sap in stimulating cells migration, VEGF and nitric oxide (NO) level in Human Umbilical Vein Endothelial Cells (HUVECs) culture that induced by pro-inflammatory cytokine IL-1 (Interleukin-1). The ABT sap was obtained by pressing a fresh Ambon banana stem, then was mixed with culture medium into 0.125%, 0.25% and 0.5% concentration. The ABT sap then was used for treating HUVECs cell that induced by IL-1 200 ng/mL for 48-hours. The result of this study shows that Ambon banana-tree sap increased HUVECs cell migration. However, after 48-hours treatment with ABT sap showed no difference in the VEGF and NO level in the culture media. These results suggested ABT sap able to increase migration to HUVECs that promising for wound healing agent. Therefore, the further research to elucidate the detailed mechanism and identify the active compound warrant to be done.
Evaluation of sST-2 Role in LVH Regression Obtained in Hypertensive Mice Models After Blocking Renin-Angiotensin System Lilik Yusetyani; Siti Rofida; Dian Yuliartha Lestari; Wawan Kurniawan; Nursela Hijriani; Ilham Niawan Saputra; Setyawati Soeharto; Mohammad Saifur Rahman
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Abstract

Soluble ST2, is a protein which acts as a decoy receptor for interleukin-33, and served as biomarker associated with left ventricular hypertrophy (LVH).  Few data exist in evaluating the effects of anti-hypertensive agents on the role-played form ST2 on regression of LVH. This study was designed to compare the effects of captopril and valsartan on blood pressures, plasma renin and soluble ST2 levels and regression of LVH in hypertensive mice models. Twenty-four male mice (Mus musculus L), were divided into four groups, namely aquadest/control, L-NAME, L-NAME + captopril and L-NAME + valsartan groups respectively. Mice blood pressures were measured on day 14th after induction with L-NAME extract 1.75 mg/25 g BW/day (pretreatment) and day 14th post treatment. Levels of plasma renin, sST2, and ventricular wall thicknesses reflecting LVHs, were measured on day 14th post treatment. Administration of L-NAME within 14 days resulted in making mice models to be hypertensive paralleled by an increase of Ventricular wall thickness. Treatment with captopril and valsartan lowered the blood pressures to normal level within the next 14 days. Valsartan and captopril treatment induced a significant decrease of plasma renin level. Valsartan, but not for captopril treatment prevented wall thickness increase (p < 0.05), while plasma sST2 was not able to mirroring this effect. Captopril and valsartan had similar effect in lowering plasma renin level and   blood pressure, but sST2 seems to be not involved in LVH regression obtained in hypertensive mice models after blocking renin-angiotensin system.
Prolonged-heated High-Fat Diet Increase the Serum LDL Cholesterol Level and Induce the Early Atherosclerotic Plaque Development in Wistar Rats Valentina Yurina; Ema Pristi Yunita; Tri Yudani Mardining Raras; Achmad Rudijanto; Kusworini Handono
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Abstract

Rats are one of the most widely used animal models in health research. However, since rats are relatively resistant to atherosclerosis, the transgenic rats often used to study atherosclerosis in rats. Our study suggests a prolonged-heated lipid to induce atherosclerosis in rats, therefore provide a more low-cost option to study atherosclerosis in rats. Aims of this study is to compare the effect of heated high-fat diet (HFD) to the LDL and HDL cholesterol level and foam cell formation in the Wistar rat animal model. Rats were divided into three groups, control group was given with the normal diet, and the other two treated groups received oxidized HFD (heated HFD) and HFD, respectively. The heated HFD contain lard that was previously heated at 190°C for 24 h. Diet was given for 8 weeks. The serum LDL and HDL cholesterol level were measured before and 4th and 8th weeks after treatment with help of colorimetric measurement. The aorta analyzed for the foam cell formation after HE staining using the light microscope.  The prolonged- heated HFD significantly increased the LDL cholesterol from the 4th week of the treatment (p = 0.023). The rats aortic from HFD and heated HFD treated groups showed a mononuclear cells infiltration and the early foam cell formation. The heating process of the lipid caused lipid oxidation which significantly increased the LDL cholesterol level of the animal model and foam cells formation. This study suggests that Wistar rats with heated HFD could demonstrated early atherosclerosis plaque development.
Soil Arthropod Diversity and Composition Inhabited Various Habitats in Universitas Brawijaya Forest in Malang East Java Indonesia Amin Setyo Leksono; Ninda Merisa Putri; Zulfaidah Penata Gama; Bagyo Yanuwiyadi; Anisa Zairina
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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A study on soil arthropod abundance, diversity and composition have been done on November 2016 to March 2017 using pitfall traps. The objective of this study is to analyze variations of the soil arthropod abundance, diversity and composition among different habitats in a university forest.  The study was carried out in Universitas Brawijaya Forest (UBF) Malang, East Java (7°49'S, 112°34'E, 1,200 m in altitude), consisted of four locations: an agroforestry (AF), a gallery forest (GF), the pine stands (PS) and a settlement yard (SY). At each site, a total of 10 traps (5 by 2 rows) were placed systematically at 4-m intervals. Glass cups (10 cm in diameter and 7 cm deep) were buried in the ground during 24 hours. There were 2286 individuals of arthropod collected from all sampling locations. Overall the samples collected consist of 41 families of arthropods. The abundance (mean ± SE) of soil arthropod was highest in PS and the lowest in SY. Statistically, variations in abundance among locations were significant (F = 7.39, p < 0.01). The taxa richness of arthropod was highest in GF and the lowest in SY. Statistically, variations in taxa richness among locations were significant (F = 4.26, p < 0.05).  The diversity was the highest in the GF (1.9 ± 0.1) lowest in the SY (0.74 ± 0.1). Statistically, variations in diversity among study sites were significant (F = 26.73, p < 0.001). In general, scavenger dominated the composition of soil arthropods. The highest proportion of scavenger abundance present in SY was 84.9%, while the lowest in the GF was 29.3%. The highest litter transformer composition in GF was 33.9%, and the lowest in SY was 8%. The highest decomposer in PS was 26.9% and the lowest in AF was 12.9%. The highest predator in AF was 20.7% and the lowest in SY was 1%. Compositions of soil arthropod were affected by environmental factors such as soil temperature and light intensity.
The Diversity of Endophytic Bacteria from the Traditional Medicinal Plants Leaves that Have Anti-Phytopathogens Activity Syukria Ikhsan Zam; Anthoni Agustien; Syamsuardi Syamsuardi; Akmal Djamaan; Irfan Mustafa
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.09.01.8

Abstract

Endophytic bacteria live in plant tissues which utilized in plant protection against phytopathogens. This study aims to investigate the diversity of endophytic bacteria from the leaves of traditional medicinal plants that has anti-phytopathogens properties. Isolation of endophytic bacteria was done by spread plate method. The bacteria were characterised by Gram staining and the 16S rRNA gene analysis. Further screening of anti-phytopathogen activity used disc diffusion method for Ralstonia solanacearum, Xanthomonas campestris, Fusarium oxysporum, and Sclerotium rolfsii. All togethers, sixteen isolates of endophytic bacteria from the leaves of eight medicinal plants species were obtained. Fourteen isolates had an anti-phytopathogen (with eight isolates against R. solanacearum, seven isolates against X. campestris, nine isolates against F. oxysporum, and five isolates against S. rolfsii). From the 14 isolates identified, phylum Firmicutes were dominant (64.3%), followed by Proteobacteria (28.6%), and Actinobacteria (7.1%). Phylum Firmicutes consists of Bacillus indicus (BJF1, TCF1, and MCF2), Bacillus pumilus (CAF4), Bacillus sp. (CAF1), Bacillus subtilis (AAF2, MCF1, CAF3, and MCF3); phylum Proteobacteria consists of Pantoea agglomerans (CAF2), Pantoea stewartii (AAF4), Pseudomonas oryzihabitans (AAF3), and Pseudomonas psychrotolerans (AAF1); and phylum Actinobacteria consists of Kocuria kristinae (CSF1).
Ovitrap Index and Transovarial Transmission Rate of Dengue Virus of Male and Female Aedes aegypti Mosquitoes in Makassar, South Sulawesi, Indonesia Isnadiyah Juhdi; Loeki Enggar Fitri; Lilik Zuhriyah; Andi Arahmadani Arasy
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.09.01.13

Abstract

The incidence rate (IR) of dengue hemorrhagic fever (DHF) in Indonesia has increased in recent years and still causes a health problem. Makassar, as one of the big cities in Indonesia, is also experiencing of DHF cases. According to the Health Office of Makassar City, DHF cases during 2014 – 2016 has increased from 139 to 250 cases. The defense mechanism of dengue virus in transovarial transmission from female mosquitoes to eggs is estimated to be one of the factors that increase the rate of DHF. In addition, the circulation of the Aedes aegypti mosquitoes can also affect the increase of the rate. This study aims are to identify ovitrap index and to find out how much the vertical transmission of dengue virus by measuring the minimum infection rate (MIR) and the distribution of four dengue virus serotype in Ae. aegypti mosquitoes in the city of Makassar, South Sulawesi, as well as their association with the incidence rate (IR) in the area. This observational research uses ecological study with cross-sectional approach. The samples of the study are male and female mosquitoes from Ae.aegypti eggs obtained from the installation of ovitrap  in 30 urban villages in Makassar. Dengue virus identification was performed using a reverse transcriptase polymerase chain reaction (RT-PCR). These results showed that the ovitrap index (IO) was in the range of 0 - 66.7%. The average value of the ovitrap index outside the house (44.44%) was greater than inside house (37.22%). The results of identification of dengue virus using RT-PCR showed negative results as indicated by the non-formation of a band on 75 pools male and 78 pools female Ae. aegypti mosquitoes after electrophoresis. The results of this study indicated that the Ae. aegypti mosquito in Makassar City showed a tendency to lay eggs outside the house due to the habit of the people who put rain water shelters outside the house which could become breeding place for Ae. aegypti mosquitoes. This study also showed that there was no transovarial transmission of DENV found in male and female Ae. aegypti mosquitoes in Makassar City during November 2017 until January 2018.
Distribution and Phytocomponent in the Ethanol Extract of Globba candida Gagnep. (Zingiberaceae) by GC-MS Analysis Putri Sri Andila; I Gede Tirta
Journal of Tropical Life Science Vol. 9 No. 1 (2019)
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Abstract

Globba is the third largest genera in the Zingiberaceae family, distributed in tropical and sub-tropical regions with the center of biodiversity in Southeast Asia. The study about phytochemical contents Globba is an interesting especially Globba candida Gapnep which have been never reported. The aims of this study were to observe distribution and phytochemical compounds of ethanol extract of G. candida Gapnep. found on Bali Island. Hydrodistillation was used to determine the presence of its essential oil and a Gas Chromatography-Mass Spectrometry (GC-MS) was used to carry out the phytochemical analysis of the essential oil and ethanol extracts of G. candida Gapne. The phytochemical analysis of the rhizomes and leaves ethanol extracts of G. candida Gapnep revealed 36 and 8 identified chemical compounds representing 85,82% and 85,47% of the total analyzed extracts. However, there was no essential oil constituent found in G. candida Gapnep. The main compounds of the rhizome extract of G. candida Gapnep were levoglucosan 19.07%, allylhydrazone acetaldehyde 5.52%, trans-2,3-epoxybutane 6.30%, butan-3-enoic acid methyl ester 4.36%, 2-methylcyclopentanone 4.02%, and 2-n-propyl-oxetan 4.00%. While the dominant contents of the leaves extract of G. candida Gapnep were pinostrobin chalcone 75.63%.

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