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Articles by Ronny Lesmana
Total Records ( 4 ) for Ronny Lesmana
  Aziiz Mardanarian Rosdianto , Irma Melyani Puspitasari , Ronny Lesmana and Jutti Levita
  Background and Objective: Flavonols in plants are catalyzed by flavonol synthase (FLS) enzyme. FLS was reported expressed in flowers and fruits, i.e., Dianthus caryophyllus L. (Caryophyllaceae), Petunia hybrida Hort. (Solanaceae), Arabidopsis thaliana L. (Brassicaceae), Citrus unshiu Marc. (Rutaceae). However, none reported about FLS in medicinal plants, particularly those which possess anti-inflammatory activity. This study was aimed to extract and identify FLS in the rhizome of Boesenbergia rotunda (Zingiberaceae) and to determine quercetin in the ethanol extract of the rhizome. Materials and Methods: The protein extraction of the rhizome was carried out by employing Laing and Christeller’s (2004) and Wang’s (2014) methods. The extracted-proteins were separated by using SDS-PAGE, followed by the measurement of FLS intensity by using Gel Analyzer. The FLS-1 of recombinant A. thaliana was employed as the standard. The determination of quercetin in the rhizome was carried out using LC-MS. Results: The FLS occurred as a thick band at 38 kDa with intensity 116-158. The LC chromatogram of the extract indicated a small peak at 7.94 min similar to that of quercetin standard. The MS spectra at 7.94 min indicated that quercetin is present in the B. rotunda rhizome (m/z = 303.0549). The concentration of quercetin in the extract is 0.022% w/v. Conclusion: The FLS, an enzyme which plays an important role in producing quercetin, was detected in B. rotunda rhizome planted in Indonesia. As a consequence, quercetin in a small amount, was also quantified in the rhizome of this plant. This report will add a scientific insight of B. rotunda for biological sciences.
  Iwan Setiawan , Lovita Adriani , Zakiaturrahmi , Hanna Goenawan , Vita Murniati Tarawan and Ronny Lesmana
  Background and Objective: Soy yogurt is fermented soy milk and its nutrient-rich with isoflavones. Soy yogurt decreases blood glucose levels by utilizing the conversion of isoflavones. This study aimed to analyze the effect of soy yogurt on blood glucose level and Glut4 gene expression on rats' soleus muscle. Materials and Methods: Twenty-five rats (eighteen-weeks old) were divided into 5 groups, e.g., the control (P0), positive control (P1, 100% yogurt) and three treatment groups (P2, 50% soy yogurt+50% yogurt; P3, 75% yogurt+25% soy yogurt and P4, 75% soy yogurt+25% yogurt). All treatment groups were treated with different soy yogurt formula and administered for 12 weeks by gavaging. Under anesthetized, rats were sacrificed, then blood samples and soleus muscle were collected and stored at -80°C until use. RNA was extracted from soleus muscle and run for Glut4 mRNA expression using (RT)-PCR. Data were analyzed using one way ANOVA and followed by post hoc test LSD (Least Significant Differences test). Results: There is no difference in rat body weight among groups after 12 weeks of soy yogurt consumption. Blood glucose levels were decreased at least 25% lower level compared to the control baseline by the various formulation of soy yogurt. Interestingly, there is a distinct pattern of Glut4 mRNA expression level in the soleus muscle, P1 increased the expression but not with other formulations decreased the expression (P2, P3 and P4). Conclusion: Taken together, a different formulation of soymilk and cowmilk effectively reduces blood glucose level and modulates Glut4 mRNA expression. In addition, a specific combination of bacteria type for fermenting soy yogurt could be a key to effectiveness for modulating blood glucose levels.
  Ronny Lesmana , Susianti , Todia Pediatama , Nova Sylviana , Yuni Susanti Pratiwi , Hanna Goenawan and Unang Supratman
  Background and Objective: The natural bioactive compounds of Curcuma longa, known as curcuminoids, has been shown to exerts anticancer effects to diverse cancer cell line in vitro, including breast cancer cell line. These curcuminoids consist of curcumin (Cur), demethoxycurcumin (DMC) and bisdemethoxycurcumin (BDMC). Furthermore, there has never been a study to compare the extent of antiproliferative and apoptotic modulation potential between Cur, DMC and BDMC in the breast cancer cell, until now. In the present study, we explore the efficacy among Cur, DMC and BDMC to alters MCF-7 cell viability, which might lead to apoptotic modulation. Materials and Methods: This kind of study was performed in vitro whereby the cells were maintained in an appropriate medium and the anticancer effect of curcuminoids (Cur, DMC and BDMC) was measured by using resazurin-based PrestoBlue cell viability assay. Later, MCF-7 breast cancer cells were cultured in 12 wells plate added with different concentrations of Cur, DMC and BDMC for western blotting analysis. Statistical analysis was performed with GraphPad 8, One-way ANOVA and Student’s t-test. Results: The result showed that Cur, DMC and BDMC inhibiting the proliferation of MCF-7 cells. In the concentration dose of 31.25 μg mL1, the cell viability in cells treated with Cur is 27%, DMC is 31.5% and BDMC is 46%. The IC50 dose of Cur, DMC and BDMC were 25.63, 29.94 and 36.91 μg mL1. Conclusion: Cur is more effective in inhibiting proliferation and apoptotic modulation in MCF-7 cells compare to DMC and BDMC. It represents the potential of Cur, DMC and BDMC as adjunctive therapy in treating breast cancer.
  Imam Megantara , Ronny Lesmana , Nova Sylviana , Adi I. Cahyadi and Sunarjati Sudigdoadi
  Background and Objective: Detection of methicillin-resistant S. aureus have become a challenge in the presence of oxacillin-susceptible and mecA-positive S. aureus (OS-MRSA), concerning the misidentification events and therapeutic implications. This study aims to identify the OS-MRSA in clinical isolates of Post-viral acute rhinosinusitis, which, hopefully, can interfere with the therapeutic strategy. Materials and Methods: There were 60 patients diagnosed with Post-viral acute rhinosinusitis, recruited from an Ear, Nose and Throat (ENT) outpatient clinic. Staphylococcus aureus isolates were identified from the culture and were then tested for antibiotics susceptibility using a Kirby-Bauer disc diffusion test. The mecA, mecC and blaZ genes were determined using the Polymerase Chain Reaction (PCR) method. Results: Staphylococcus aureus was identified in 20 of the 60 samples from the patients (33.3%; 95% CI: 21.0-45.6). Of the 20 isolates, 19 isolates (95%) had a positive mecA gene, 19 (95%) had a positive mecC gene and 20 (100.0%) had a positive blaZ gene. The majority of the mecA-positive S. aureus showed an oxacillin-susceptible (85%) and 3 isolates (15.0%) were oxacillin-resistant toward the S. aureus. Conclusion: There was a high proportion of Oxacillin/cefoxitin-Susceptible mecA-positive S. aureus in the study population that indicate phenotypic susceptibility to antibiotics does not always indicate the absence of genes that carry resistant traits, thus allowing misidentification if the only phenotypic examination is carried out.
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