Kusmardi

In silico, in vitro and in vivo Tests of Ficus deltoidea Jack Leaves Extract as Inhibitor for Beta-Catenin Expression in Colon Carcinogenesis Model

Context: Ficus deltoidea Jack leaves extract as anticolorectal cancer. Aims: This study aims to analyze the potential of FD extract to be an anti-colon cancer by investigating the extract capability in reducing β-catenin expression and inhibiting colon cancer cells growth. Settings |and Design: The research was conducted in Medical Faculty Universitas Indonesia with experimental design. Methods and Material: FD ethanol extracts was tested in vitro, in silico and in vivo. In vitro test was conducted to human colon cell lines. In vivo test was conducted to Balb/c mice induced with 10 mg/kg azoxymethane (AOM) and dextran sodium sulfate 1% (DSS). The colonic tissue collected was the distal portion. β-catenin expressions in the cytoplasm and nuclei of the epithelial cells of the colon crypt were semi quantitatively assessed using the immunohistochemistry staining on ten visual fields with 400x magnification. Statistical analysis used: SPSS. Results: FD ethanol extracts inhibit the expression of β-catenin in the crypt ephitelial cells of mice colon induced with AOM/DSS. The extracts also inhibit the growth of human colon cancer (HCT 116) with IC50 value of 5.41 mg/mL. Phytochemical screening to the extracts gave three groups of compounds: alkaloid, flavonoid, and tannin. Water fraction is the best fraction. Based on in the results of in silico analysis with molecular docking, FD extract is believed to influence the expression of β-catenin, in which vitexin and isovitexin are the main candidate compounds to influence the expression of the protein. Conclusion: FD ethanol extract is potential to be an anti-colon cancer proven by the extract capability to reduce β-catenin expression.

Comparison of Helicobacter pylori Detection Using Immunohistochemistry and Giemsa and Its Association with Morphological Changes in Active Chronic Gastritis

Background: Gastritis is an inflammation of the gastric mucosa as a response to infection or irritation of the gaster. The most common aetiology of chronic gastritis is Helicobacter pylori (H. pylori) infection . Presence of H. pylori is associated with the occurrence of inflammation, atrophy, and intestinal metaplasia. In terms of morphology, H. pylori is known in 2 forms, which are rod-shaped and coccoid-shaped. Coccoid-shaped bacteria are difficult to detect using Giemsa staining. Therefore, immunohistochemistry staining of H. pylori and evaluation of the sensitivity of coccoid-shaped of H. pylori are needed. Method: Cross-sectional study on 90 biopsy tissues of chronic gastritis patients in year 2015 and 2014, which included 30 Giemsa cases with positive H. pylori , 30 cases of active chronic gastritis with negative H. pylori but coccoid-shaped was found, and 30 non-active chronic gastritis, were subsequently stained with immunohistochemistry staining of H. pylori . Results: Expression of coccoid-shaped H. pylori in active chronic gastritis was significantly different (p < 0.05) in immunohistochemistry staining. There was a significant difference between active chronic gastritis with positive H. pylori and negative H. pylori in immunohistochemistry staining with degree of inflammation. Sensitivity and specificity test between Giemsa and immunohistochemistry staining showed sensitivity of 65% and specificity of 100%. Conclusion : Immunohistochemistry staining in active chronic gastritis was more sensitive compared to Giemsa staining in detecting H. pylori, particularly the coccoid-shaped bacteria.