219 research outputs found

    KURKUMIN SEBAGAI OBAT KANKER: MENELUSURI MEKANISME AKSINY (CURCUMIN AS AN ANTINEOPLASTIC AGENT: THE ELUCIDATION OF ITS MOLECULAR MECHANISM OF ACTION)

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    ABSTRAK Kurkumin merupakan bagian terbesar pigmen kuning yang terdapat dalam rizom kunyit, serbuk rizom kunir (Curcuma longa L), mempunyai sifat sebagai antioksidan, anti-inflamasi dan antineoplastik. Senyawa keturunan fenol (kurkumin) mempunyai efek menghambat premalignan dan malignan sel kanker ketika proses inisiasi dan metatesis Kurkumin sebagai sebagai antineoplastik mempunyai fungsi mengatur aktivitas cyclooxygenase (COX), dan lipoksigenase (LOX) schingga mengurangi aktivitas metabolisme sel kanker. Kurkumin juga mengatur banyak sel yang mengalami gejala penyimparigan sehingga siklus berhenti atau mencegah proses pertumbuhan kanker maupun menekan perkembangan sel tumor. Pengaturan onkogen dengan jalan represi maupun supresi, yang kebanyakan mcnyebabkan siklus sel berhenti, sedangkan perkembangan sel tumor ditekan aktivitas en-nya. Invcstigasi selanjutnya sangat diperlukan untuk inenjelaskan interaksi biotnolekuler oleh kurkumin dalam mekanismenya menghalangi sifat dan cara pertumbuhan sel kanker. Kata kunci: kurkumin. anti kanker, mekanisme

    Ekstrak Etanolik Daun Gynura Procumbens (Luor) Merr. Menghambat Proliferasi Sel Kanker Payudara Tikus Pada Karsinogenesis Yang Diinduksi Dengan Dimetilbenz(a)antrazena (Dmba)

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    Penelitian sebelumnya menunjukkan bahwa ekstrak etanolik daun Gynura procumbens dapat menghambat pertumbuhan tumor payudara tikus yang diinduksi DMBA. Penelitian ini bertujuan untuk mengetahui efek ekstrak etanolik daun Sambung nyawa (Gynura procumbens (Luor) Merr) pada proliferasi sel kanker payudara tikus yang diinduksi dengan Dimetilbenz(a)antrazena (DMBA). Enam puluh ekor tikus betina galur SD umur 6 minggu dibagi menjadi 6 kelompok yaitu tanpa perlakuan, perlakuan DMBA saja dan empat kelompok perlakuan DMBA+ekstrak. Inisiasi DMBA dilakukan dengan dosis 20 mg/kgBB yang diberikan sebanyak 10 kali dengan frekuensi pemberian 2 kali setiap minggu. Mulai minggu ke-1 (post I) atau ke-6 (post II) kelompok perlakuan mendapat ekstrak etanolik daun Gynura procumbens dalam CMC 0,5 % seminggu 3 kali melalui oral dengan dosis 250 mg/kgBB dan 750 mg/kgBB. Pada minggu ke-16 tikus dikorbankan, jaringan payudara diambil untuk dibuat preparat histologi dengan teknik pewarnaan silver (AgNOR). Mean AgNOR (mAgNOR) dihitung pada setiap preparat tiap kelompok. mAgNOR kelompok perlakuan dibandingkan dengan mAgNOR kelompok tanpa perlakuan. Hasil penelitian menunjukkan ekstrak etanolik daun Gynura procumbens dengan dosis 250 mg/kgBB dan 750 mg/kgBB yang diberikan mulai minggu kesatu maupun ke-6 setelah inisiasi DMBA terakhir dapat mengurangi proliferasi sel kanker payudara tikus. Rata-rata mAgNOR kelompok tanpa perlakuan dan perlakuan DMBA saja masing-masing 0,8 ± 0,34 dan 2,7 ± 0,41, mAgNOR post I kelompok dosis 250 dan dosis 750 masing-masing 1,4 ± 0,39 dan 1,3 ± 0,09, sedangkan mAgNOR post II kelompok dosis 250 dan dosis 750 masing-masing 1,6 ± 0,47 dan 1,5 ± 0,31. Pengamatan terhadap ekspresi COX-2 menunjukkan adanya penurunan pada kelompok perlakuan ekstrak dosis 250 dan 750 mg/kgBB. Hasil-hasil tersebut menunjukkan bahwa ekstrak etanolik daun Gynura procumbens dapat menghambat proliferasi sel-sel tumor payudara yang kemungkinan berhubungan dengan penurunan ekspresi COX-2

    Pgv-0 and Pgv-1 Increased Apoptosis Induction of Doxorubicin on Mcf-7 Breast Cancer Cells

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    As chemotherapeutic backbone for breast cancer therapy, doxorubicin showed various side effects and induced resistancy of breast cancer cells. Development of targeted therapy on breast cancer focused on combinatorial therapy of doxorubicin and molecular targeted agents. PGV-0 and PGV-1, a curcumin analogue showed potency as co-chemotherapeutic agent with doxorubicin. Our previous study of PGV-0 and PGV-1 showed cytotoxic activity in T47D cells. Therefore, the aim of this research is to examine the synergistic effect of PGV-0, PGV-1 on the cytotoxic activity of doxorubicin through cell cycle modulation and apoptotic induction on MCF-7 breast cancer cell lines. The cytotoxic assay of PGV-0, PGV-1, doxorubicin, and their combination were carried out by using MTT assay. Cell cycle distribution and apoptosis were determined by flowcytometer FACS-Calibur and the flowcytometry data was analyzed using Cell Quest program. Single treatment of PGV-0, PGV-1 and doxorubicin showed cytotoxic effect on MCF-7 with cell viability IC50 value 50 µM, 6 µM and 350 nM respectively. Single treatment of Doxorubicin 175 nM induced G2/M arrest. Single treatment of PGV-0 5 µM induced G2/M arrest while in higher dose 12.5 µM, PGV-0 induced apoptosis. Combination of doxorubicin 175 nM and PGV-0 5 µM induced apoptosis. Combination of doxorubicin 175 nM and PGV-0 12.5 µM also increased apoptosis induction. Single treatment of PGV-1 0.6 µM induced G1 arrest while in higher dose 1.5 µM, PGV-1 induced apoptosis. Combination of doxorubicin 175 nM and PGV-1 0.6 µM induced apoptosis. Combination of doxorubicin 175 nM and PGV-0 1.5 µM also increased apoptosis induction. PGV-0 and PGV-1 are potential to be delevoped as co-chemotherapeutic agent for breast cancer by inducing apoptosis and cell cycle modulation, but the molecular mechanism need to be explored detail

    Revealing the Potency of Cinnamon as an Anti-cancer and Chemopreventive Agent

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    Cinnamon (Cinnamomum spp.), an ancient spice, has been explored as a potential for medicinal purposes. Despite numerous studies about its potency in overcoming of numerous diseases, the potency as anti-cancer would be a challenge. This current article provides a review of the anti-cancer and chemoprevention potency of cinnamon and its major constituents: cinnamaldehyde, cinnamic acid, 2-hydroxycinnamaldehyde, 2-methoxycinnamaldehyde, and eugenol. Comprehensively, cinnamon and its constituents exhibit the anti-cancer and cancer prevention activities through various mechanisms: (1) anti-proliferation, (2) induction of cell death, (3) anti-angiogenesis, (4) anti-metastasis, (5) suppression of tumor-promoted inflammation, (6) immunomodulation, and (7) modulation of redox homeostasis; both in vitro and in vivo. Moreover, cinnamon also shows the synergistic anti-cancer effect with well-known anti-cancer drugs, such as doxorubicin, which support its potency to be used as a combination chemotherapeutic (co-chemotherapeutic) agent. However, further study should be established to determine the exact target molecule(s) of cinnamon in the cancer cells.Keywords: cinnamon, spice, cancer, anti-cancer, chemopreventiv

    The potency of Pentagamavunone‐0 (PGV‐0) as chemopreventive agent for the formation and growth of breast cancer as revealed in 3D model

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    Pentagamavunone‐0 (PGV‐0) or 2,5‐bis(4’‐hydroxy‐3‐methoxybenzylidine)‐cyclopentanone is a curcumin analogue that exhibits anticancer activity in breast cancer cells. However, most of previous reports are limited to the use of two‐dimensional (2D) cell culture. The use of three‐dimensional (3D) cell culture model in cancer research can represent the real condition of cancer growth in patients better than the 2D culture. The purpose of this study was to determine the anticancer activity of PGV‐0 on a 3D model of HCC 1954 breast cancer cells. HCC 1954 cells were grown in the 3D culture in the presence of PGV‐0, and the spheroid formation and growth of formed spheroids were observed using microscope at 24 and 96 h, respectively. The cytotoxic effects were measured by MTT assay. PGV‐0 inhibited the formation and growth of spheroids at the concentration as low as 60 µM. The cytotoxic effect of PGV‐0 appeared in a dose‐dependent manner with the IC50 value of 70.9 µM. The results of this study indicate that PGV‐0 has an anticancer activity on a 3D model of HCC 1954 breast cancer cell line. Therefore, the result supported the potency of PGV‐0 as cancer chemopreventive agent
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