• Asian Pacific Journal of Cancer Prevention
• /
• 제15권6호
• /
• pp.2835-2839
• /
• 2014

Prostate cancer is one of the most prevalent malignant cancers in men. The isoflavone formononetin is a main active component of red clover plants. In the present study, we assessed the effect of formononetin on human prostate cancer DU-145 cells in vitro, and elucidated posssible mechanisms. DU-145 cells were treated with different concentrations of formononetin and cell proliferation was assessed by MTT assay, cell apoptosis by Hoechst 33258 and flow cytometry, and protein levels of RASD1, Bcl-2 and Bax by Western blotting. The results showed that formononetin inhibited the proliferation of DU-145 cells in a dose-dependent manner. DU-145 cells treated with different concentrations of formononetin displayed obvious morphological changes of apoptosis under fluorescence microscopy. In addition, formononetin increased the proportion of early apoptotic DU-145 cells, down-regulated the protein levels of Bcl-2 and up-regulated those of RASD1 and Bax. The level of RASD1 reached its maximum at 48h post-treatment, and rapidly decreased thereafter. Together, we present evidence that formononetin triggered cell apoptosis through the mitochondrial apoptotic pathway by up-regulating RASD1.

• Mycobiology
• /
• 제48권3호
• /
• pp.219-227
• /
• 2020

Androgen-independent prostate cancer accounts for mortality in the world. In this study, various extracts of a medical fungus dubbed Ganoderma formosanum were screened for inhibition of DU145 cells, an androgen-independent prostate cancer cell line. Results demonstrated that both hexane (GF-EH) and butanol (GF-EB) fraction of G. formosanum ethanol extract inhibited DU145 cell viability in a dose-dependent manner. GF-EH induced cell-cycle arrest in G1 phase of DU145 cells via downregulation of cyclin E2 protein expression. In addition, GF-EB triggered extrinsic apoptosis of DU145 cells by activating caspase 3 gene expression resulting in programed cell death. Above all, both GF-EH and GF-EB show lower toxicity to normal human fibroblast cell line compared to DU145 cell, implying that they possess specific drug action on cancer cells. This study provides a molecular basis of G. formosanum extract as a potential ingredient for treatment of androgen-independent prostate cancer.

• Biomolecules & Therapeutics
• /
• 제13권3호
• /
• pp.185-189
• /
• 2005

We isolated a coumarin compound, isoimperatorin ($C_{16}H_{14}O_4$ mw: 270) from Angelica koreana through silica gel column chromatography, and characterized it by NMR. Here, for the first time we observed that isoimperatorin (25, 50 and 100 ${\mu}M$) treatment for 24-72h inhibited growth and induced death in human prostate carcinoma DU145 cells. Further, in mechanistic investigation, isoimperatorin-induced cell growth inhibition was associated with a strong increase in G1 arrest in cell cycle progression, which started at 24h of the treatment. These findings suggest a novel anticancer efficacy of isoimperatorin mediated via induction of G1 arrest against hormone refractory human prostate carcinoma DU145 cells.

• Journal of Ginseng Research
• /
• 제45권2호
• /
• pp.273-286
• /
• 2021

Background: Prostate carcinoma is the second most common cancer among men worldwide. Developing new therapeutic approaches and diagnostic biomarkers for prostate cancer (PC) is a significant need. The Chinese herbal medicine Panax quinquefolius saponins (PQS) have been reported to show anti-tumor effects. We hypothesized that PQS exhibits anti-cancer activity in human PC cells and we aimed to search for novel biomarkers allowing early diagnosis of PC. Methods: We used the human PC cell line DU145 and the prostate epithelial cell line PNT2 to perform cell viability assays, flow cytometric analysis of the cell cycle, and FACS-based apoptosis assays. Microarray-based gene expression analysis was used to display specific gene expression patterns and to search for novel biomarkers. Western blot and quantitative real-time PCR were performed to demonstrate the expression levels of multiple cancer-related genes. Results: Our data showed that PQS inhibited the viability of DU145 cells and induced cell cycle arrest at the G1 phase. A significant decrease in DU145 cell invasion and migration were observed after 24 h treatment by PQS. PQS up-regulated the expression levels of p21, p53, TMEM79, ACOXL, ETV5, and SPINT1 while it down-regulated the expression levels of bcl2, STAT3, FANCD2, DRD2, and TMPRSS2. Conclusion: PQS promoted cells apoptosis and inhibited the proliferation of DU145 cells, which suggests that PQS may be effective for treating PC. TMEM79 and ACOXL were expressed significantly higher in PNT2 than in DU145 cells and could be novel biomarker candidates for PC diagnosis.

• Asian Pacific Journal of Cancer Prevention
• /
• 제14권9호
• /
• pp.5421-5425
• /
• 2013

Background: To assess the antioxidant effects of gamma-oryzanol on human prostate cancer cells. Materials and Methods: Cytotoxic activity of gamma-oryzanol on human DU145 and PC3 prostate cancer cells was determined by proliferation assay using 3-(4, 5-dimethylthiazol, 2-yl)-2, 5-diphenyl tetrazolium bromide (MTT) reagent. mRNA levels of genes involved in the intracellular antioxidant system, superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and glutathione reductase (GSR) were determined by reverse transcription-polymerase chain reaction (RT-PCR). Cancer cell lysates were used to measure lipid peroxidation using thiobarbituric acid reactive substance (TBARS). Glutathione contents of the cell lysates were estimated by the reaction between sulfhydryl group of 5, 5'-dithio (bis) nitrobenzoic acid (DTNB) to produce a yellow-color of 5-thio-2-nitrobenzoic acid using colorimetric assay. Catalase activity was also analysed by examining peroxidative function. Protein concentration was estimated by Bradford's assay. Results: All concentrations of gamma-oryzanol, 0.1-2.0mg/ml, significantly inhibited cell growth in a dose- and time-dependent fashion in both prostate cancer cell lines, DU145 and PC3. Gene expression of catalase in DU145 and PC3 exposed to gamma-orizanol at 0.5mg/ml for 14 days was down regulated, while mRNA of GPX was also down regulated in PC3. The MDA and glutathione levels including catalase activity in the cell lysates of DU145 and PC3 treated with gamma-oryzanol 0.1 and 0.5mg/ml were generally decreased. Conclusions: This study highlighted effects of gamma-oryzanol via the down-regulation of antioxidant genes, catalase and GPX, not cytotoxic roles. This might be interesting for adjuvant chemotherapy to make prostate cancer cells more sensitive to free radicals. It might be useful for the reduction of cytotoxic agents and cancer chemoprevention.

• 한국융합학회논문지
• /
• 제12권9호
• /
• pp.179-183
• /
• 2021

본 연구는 다양한 항암성분을 함유한 Celeriac Extract의 암세포 증식에 미치는 영향을 살펴보기 위하여 실시되었다. 실험에 사용한 암 세포주는 5종으로 폐암세포 A549, 전립샘암세포 DU-145, 자궁암세포 HeLa, 유방암세포 MCF-7, 간암세포 SNU-182 로 모두 인체 유래 암 세포주를 사용하였으며 Celeriac Extract 10ug/mL, 100ug/mL, 1000ug/mL 에 대한 암세포의 증식 억제는 CCK-8 방법을 이용하여 측정하였다. 암세포 증식 억제를 살펴본 결과 Celeriac Extract 1000ug/mL는 폐암세포 A549, 전립샘암세포 DU-145, 자궁암세포 HeLa, 간암세포 SNU-182에서 유의한 증식 억제를 보였으며 농도 의존성을 나타냈다. 그러나 유방암세포 MCF-7 에서는 농도 의존적인 감소만 보였다. 결론적으로, 다양한 인간유래 암 세포주를 이용한 Celeriac Extract의 세포 증식 억제기전들은 암 예방효과 및 치료제 개발의 잠재력을 제공한다고 볼 수 있다.

• 한국융합학회논문지
• /
• 제13권2호
• /
• pp.257-262
• /
• 2022

본 연구의 목적은 다양한 생리활성물질을 함유한 비트 추출물의 다양한 농도를 이용하여 인체 유래 암세포 증식 저해를 살펴보기 위하여 실시하였다. 실험에 사용한 인체 유래 암세포는 6종으로 전립샘암세포 DU145, 폐암세포 A549, 유방암세포 MCF-7, 자궁암세포 HeLa, 간암세포 SNU-182, 담도암세포 SNU-1196을 사용하였으며, 비트 추출물의 다양한 농도에 대한 암세포증식 저해를 CCK-8 방법으로 측정하였다. 암세포증식 저해를 살펴본 결과 비트 추출물은 전립샘암세포 DU145를 모든 농도에서 유의성있게 농도 의존적으로 저해하였으며, 폐암세포 A549, 전립샘암세포 DU-145는 100ug/mL, 1000ug/mL에서 자궁암세포 HeLa, 간암세포 SNU-182, 담도암세포 SNU-1196는 1000ug/mL에서 유의한 증식 저해를 보였다. 실험 결과, 다양한 인체 유래 암세포를 이용한 비트 추출물의 암세포증식 저해는 암 예방 효과 및 기능성 식품 개발의 가능성을 제공한다고 볼 수 있다.

• 한국식품과학회지
• /
• 제36권2호
• /
• pp.339-344
• /
• 2004

유자는 성숙할수록 과피와 과육의 총페놀 함량은 많아지고 자유기 소거능이 높아지는 경향을 보였다. 유자로부터 추출한 18가지 용매 추출물의 항산화 활성과 전립선 암세포 DU 145, LN-CaP에 대한 세포독성 실험을 실시한 결과 과피와 과육 모두 미성숙한 유자 보다 성숙한 후 수확한 유자가 그 활성이 높게 나타냈다. 용매별로 살펴보면 과성숙 유자 과피, 과육의 클로로포름, 메탄올 추출물은 전립선 암세포 DU 145에 대하여 60% 이상의 세포사멸 효과를 나타났으며 메탄올 추출물의 효과도 농도에 따라 상당히 높은 것으로 나타났다. 또한 세포 조직을 현미경으로 살펴본 결과 추출물의 처리 농도가 증가할수록 세포 사멸이 쉽게 이루어지는 것을 확인 할 수 있었다. 이런 세포 사멸의 경향은 추출물의 자유기 소거 환성이 높을수록 높게 나타났다.

• 한방안이비인후피부과학회지
• /
• 제29권3호
• /
• pp.159-167
• /
• 2016

Prostate cancer is one of the most common non-skin cancers in men. Armeniacae Amarum Semen has traditionally been used for the treatment of inflammation diseases, leprosy, leucoderma, and tumors. Apoptosis, which is also known as programmed cell death, is an important mechanism in cancer treatment.Objectives : We observed whether an aqueous extract of Armeniacae Amarum Semen induces apoptotic cell death in human DU145 prostate cancer cells.Methods : We treated DU145 cells with Armeniacae Amarum Semen extract and investigated characteristics of apoptosis. And investigated whether treated with Armeniacae Amarum Semen extract increased Bax mRNA expression, Bcl-2 mRNA expression, caspase-3 enzyme activity and their protein level.Results : We have shown that Armeniacae Amarum Semen extract can induce apoptotic cell death in human DU145 prostate cancer cells by caspase-3 activation through the down-regulation on Bcl-2 expression and the up-regulation on Bax expression.Conclusions : It can be expected that an aqueous extract of Armeniacae Amarum Semen may offer a valuable means for the treatment of prostate cancers.

• Bulletin of the Korean Chemical Society
• /
• 제35권7호
• /
• pp.2038-2042
• /
• 2014

4-(tert-Octyl)phenol derivatives bearing the D-mannitol substructure (6a, 6b, 7) were prepared from $\small{D}$-mannitol and evaluated their anticancer activity against human lung (A549) and prostate (Lncap, Du145, PC3) cancer cell lines. Among derivatives tested, the bis(tert-octyl)phenoxy compound 7 exhibited strongest proliferation inhibitory activities against human cancer cell lines tested, especially high sensitivity to human Du145 prostate cancer cells ($IC_{50}=7.3{\mu}M$).