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Ditemukan 2 dokumen yang sesuai dengan query
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Heni Susilowati
"Buah merah (Pandanus conoideus Lam.) mulai dikenal masyarakat sebagai obat untuk berbagai penyakit di antaranya kanker. Penelitian ini bertujuan untuk menguji efek sari buah merah merek Y sebagai penghambat karsinogenesis. Pengujian dilakukan terhadap tikus putih betina galur Sprague-Dawley yang diinduksi dengan 7,12-Dimetilbenz(a)antrasen (DMBA) dan evaluasi hambatan pembentukan kanker digunakan parameter histologi jaringan kanker yang terdapat pada paru-paru. Hewan uji dibagi secara acak menjadi enam kelompok. Kelompok I (kontrol normal) diberi minyak wijen 1 ml, sedangkan kelompok II (kontrol DMBA) diberi dosis tunggal 15 mg/ml 7,12-dimetilbenz(a)antrasen (DMBA) dalam minyak wijen secara oral, selanjutnya kedua kelompok hanya diberi akuades. Pemberian bahan uji untuk kelompok III (preventif) dimulai sejak dua minggu sebelum induksi karsinogen dan dilanjutkan selama masa penelitian. Sehari setelah induksi, kelompok IV, V, VI (kuratif) diberi bahan uji dengan dosis masing-masing 0,21 ml/200 g bb; 0,43 ml/200 bb; dan 0,86 ml/200 g bb. Pengamatan dilakukan selama 120 hari. Kejadian kanker paru yang terpalpasi pada kelompok perlakuan sama dengan kontrol DMBA, yaitu dua. Secara histologi persentase kejadian kanker paru-paru pada kelompok II 20%, kelompok III 50%, kelompok IV 0%, kelompok V 20%, dan kelompok VI 30%. Dosis 0,21 ml/200 g bb sari buah merah merek Y mampu menghambat pembentukan kanker paru-paru pada tikus yang diinduksi dengan DMBA.

Buah merah (Pandanus conoideous Lam.) has known by public as a medicine for any kind of diseases, among of them is cancer. To determine the carcinogenesis inhibition effect of buah merah extract brand Y, we have examined the effect on 7,12-Dimetilbenz(a)antrasen (DMBA)-induced rat lungs cancer model in female Sprague-Dawley rats. A lungs histology was used to evaluate carcinogenesis inhibition. Rats were randomly divided into six groups. Group I (normal control) received 1 ml sesame oil; group II (DMBA control) were given a single dose of 15 mg/ml DMBA in sesame oil orally. Both groups were received aquadest during the experiment period. Group III (preventive) received sample (0.43 ml/200 b.w) beginning 2 weeks before carcinogen administration, the treatment was continued for the duration of the experiment. Starting from the next day after DMBA administration, groups IV, V, VI (curative) were induced by DMBA and received 0.21 ml/200 g bw, 0.43 ml/200 g bw, and 0.86 ml/200 g bw sample daily, respectively. All groups of rats were monitored for 120 days. There are two palpable lungs tumors in the treatment groups as the final incidence, as same as group II. Histologically, there were 20% lungs cancer in group II, 50% in group III, 0% in group IV, 20% in group V and 30% in group VI. At 0.21 ml/200 g b.w, the extract inhibited the DMBA-induced lungs carcinogenesis."
Depok: Universitas Indonesia, 2006
S32783
UI - Skripsi Membership  Universitas Indonesia Library
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Heni Susilowati
"Pseudomonas aeruginosa is a Gram negative bacterium that can cause fatal infection in immunocompromised patient. This is an opportunist pathogen which is associated with some dental infections. Pseudomonas aeruginosa produces pyocyanin that functions as an important virulent factor in bacterial invasion. It can be identified in the lesion tissue and capable to induce cellular damage in endothelial cell, respiratory, neutrophil, and lymphocytes. B lymphocyte plays a significant role in the immune response of periapical infection; however, its cellular and molecular response to pyocyanin is unclear.
Objective: To investigate cellular responses of B lymphocyte to the exposure of pyocyanin and the role of caspase-3 in its molecular mechanism.
Methods: B lymphocytes (Raji cells) were cultured, and in five replications were exposed to various concentrations of pyocyanin for 24 h. MTT assay was performed to analyze the cytotoxicity effect of pyocyanin. Cell morphological analysis using phase contrast microscope were done in separate experiments. Immunocytochemical analysis was carried out for the identification of active caspase-3 protein expression, to study the mechanism involved in pyocyanin induced cellular damage.
Results: It showed that cell viability was decreased in pcyocyanin-treated groups. Pyocyanin induced cell death on B lymphocyte in a dose-dependent manner. Statistical analysis using ANOVA demonstrated significant difference between groups with p=0.000. Nuclear fragmentation was observed in pyocyanin-induced cell death; furthermore, caspase-3 was expressed clearly in cell cytoplasm after 24 h incubation.
Conclusion: Pyocyanin is capable of inducing cell death on B lymphocyte. Caspase-3 may play an important role in the molecular mechanism of pyocyanin-induced cell death.
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Fakultas Kedokteran Gigi, 2015
AJ-Pdf
Artikel Jurnal  Universitas Indonesia Library