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INDONESIA
Medical Journal of Indonesia
Published by Universitas Indonesia
ISSN : 08531773     EISSN : 22528083     DOI : 10.13181
Core Subject : Health,
Medicine & Pharmacology
This quarterly medical journal is an official scientific journal of the Faculty of Medicine Universitas Indonesia in collaboration with German-Indonesian Medical Association (DIGM) Indexed in: IMSEAR; CAB Abstracts; Global Health; HINARI; DOAJ; DRJI; Google Scholar; JournalTOCs; Ulrichsweb Global Serial Directory; WorldCat; New Jour; Electronic Journals Library; ISJD Accredited (2013-2018) by DIKTI Kemendikbud Republik Indonesia (No:58/DIKTI/Kep/2013)
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Articles 12 Documents
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Search results for , issue " Vol 23, No 4 (2014): November" : 12 Documents clear
Lymphocyte chromosome breakage in low benzene exposure among Indonesian workers Soemarko, Dewi S.; Mansyur, Muchtaruddin
Medical Journal of Indonesia Vol 23, No 4 (2014): November
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (394.206 KB) | DOI: 10.13181/mji.v23i4.740

Abstract

Background: Benzene has been used in industry since long time and its level in environment should be controled. Although environmental benzene level has been controlled to less than 1 ppm, negative effect of benzene exposure is still observed, such as chromosome breakage. This study aimed to know the prevalence of lymphocyte chromosome breakage and the influencing factors among workers in low level benzene exposure.Methods: This was a cross sectional study in oil & gas industry T, conducted between September 2007 and April 2010. The study subjects consisted of 115 workers from production section and head office. Data on type of work, duration of benzene exposure, and antioxidant consumption were collected by interview as well as observation of working process. Lymphocyte chromosome breakage was examined by banding method. Analysis of relationship between chromosome breakage and risk factors was performed by chi-square and odd ratio, whereas the role of determinant risk factors was analyzed by multivariate forward stepwise.Results: Overall lymphocyte chromosome breakage was experieced by 72 out of 115 subjects (62.61%). The prevalence among workers at production section was 68.9%, while among administration workers was 40% (p > 0.05). Low antioxidant intake increases the risk of chromosome breakage (p = 0.035; ORadjusted = 2.90; 95%CI 1.08-7.78). Other influencing factors are: type of work (p = 0,10; ORcrude = 3.32; 95% CI 1.33-8.3) and chronic benzene exposure at workplace (p = 0.014; ORcrude = 2.61; 95% CI 1.2-5.67), while the work practice-behavior decreases the lymphocyte chromosome breakage (p = 0.007; ORadjusted = 0.30; 95% CI 0.15-0.76).Conclusion: The prevalence of lymphocyte chromosome breakage in the environment with low benzene exposure is quite high especially in production workers. Chronic benzene exposure in the workplace, type of work, and low antioxidant consumption is related to lymphocyte chromosome breakage. Thus, benzene in the workplace should be controlled to less than 1 ppm, and the habit of high antioxidant consumption is recommended.
Cytotoxic effect of γ-sitosterol from Kejibeling (Strobilanthes crispus) and its mechanism of action towards c-myc gene expression and apoptotic pathway Endrini, Susi; Rahmat, Asmah; Ismail, Patimah; Taufiq-Yap, Y.H.
Medical Journal of Indonesia Vol 23, No 4 (2014): November
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.171 KB) | DOI: 10.13181/mji.v23i4.1085

Abstract

Background: This study aimed to analyze the cytotoxicity effect of γ-sitosterol isolated from “Kejibeling” (Strobilanthes crispus), a medicinal plant, on several cancer cell lines. The mechanisms of the effects were studied through the expression of cancer-caused gene, c-myc and apoptotic pathways.Methods: This in vitro study was done using human colon cancer cell lines (Caco-2), liver cancer cell lines (HepG2), hormone-dependent breast cancer cell lines (MCF-7) and the normal liver cell lines (Chang Liver). The cytotoxic effect was measured through MTT assay and the potential cytotoxic value was calculated by determining the toxic concentration which may kill up to 50% of the total cell used (IC50). Meanwhile, the cytotoxic mechanism was studied by determining the effect of adding γ-sitosterol to the c-myc gene expression by reverse transciptase-polymerase chain reaction (RT-PCR). The effect of γ-sitosterol through apoptotic pathway was studied by using terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay.Results: γ-sitosterol was cytotoxic against Caco-2, HepG2, and MCF-7 with IC50-values of 8.3, 21.8, and 28.8 μg/mL, respectively. There were no IC50-values obtained from this compound against Chang Liver cell line. This compound induced apotosis on Caco-2 and HepG2 cell lines and suppressed the c-myc genes expression in both cells.Conclusion: γ-sitosterol was cytotoxic against colon and liver cancer cell lines and the effect was mediated by down-regulation of c-myc expression and induction of the apoptotic pathways.

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