• Journal of Breast Disease
• /
• 제6권2호
• /
• pp.39-45
• /
• 2018

Purpose: Dieckol, a phlorotannin compound isolated from Ecklonia cava, has been reported to have antioxidant, antiviral, anti-inflammatory, and anticancer properties. The purpose of this study was to investigate its anticancer effects on human breast cancer cell lines. Methods: In this study, the viability of two human breast cancer cell lines SK-BR-3 and MCF-7 was investigated after dieckol treatment using a WST-1 assay. Apoptosis and cell cycle distribution were assayed via Annexin V-fluorescein isothiocyanate and propidium iodide staining followed by flow cytometric analysis. Immunoblotting analysis was also performed using Bax/Bcl-2 to determine whether the dieckol-induced apoptosis was mediated by the intrinsic apoptotic pathway. Results: In a dose dependent manner, dieckol reduced the number of viable cells and increased the number of apoptotic cells. The effect of dieckol on the cell cycle distribution was analyzed using flow cytometry. Dieckol treatment significantly increased the percentage of MCF-7 and SK-BR-3 in the G2/M phase. Immunoblot analysis revealed that 24 hours of dieckol exposure increased the Bax/Bcl-2 ratio. Conclusion: Dieckol induced cytotoxicity in MCF-7 and SK-BR-3 human breast cancer cells inducing apoptosis and cell cycle arrest. Therefore, it is suggested that dieckol may be a potential therapeutic agent for breast cancer.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권17호
• /
• pp.7291-7296
• /
• 2014

Different plant parts of Flacourtia indica have long been used in Ayurvedic medicine. Previous studies have demonstrated that the methanolic extract of F. indica possess anti-inflammatory properties. The present study was aimed at investigating the anticancer effects of methanol extract of Flacourtia indica (FIM) aerial parts in human colon cancer (HCT116) cells. Treatment of cells with FIM at a concentration of $500{\mu}g/ml$ for 24 hours significantly reduced cell viability and induced apoptosis, which was associated with the increased cytoplasmic expression of cytochrome c, activation of caspase-3, and the cleavage of poly-(ADP-ribose) polymerase. Incubation with FIM also inhibited the levels of Bcl-2, Bcl-xl and survivin, which are the markers of cell proliferation, whereas the expression of Bax remained unchanged. Treatment with FIM led to the generation of reactive oxygen species (ROS) in a concentration-dependent manner. Pharmacological inhibition of ROS generation by pretreatment of cells with N-acetyl cysteine abrogated FIM-induced apoptosis in HCT116 cells. Thus, these results demonstrate that FIM has anti-proliferative and pro-apoptotic effects in HCT116 cells and the effects are, at least in part, due to the ROS dependent activation of caspases.

• Journal of Ginseng Research
• /
• 제46권4호
• /
• pp.592-600
• /
• 2022

Background: Di-(2-ethylhexyl) phthalate (DEHP) is the most common endocrine disrupting chemical used as a plasticizer. DEHP is associated with the development of endometrium-related diseases through the induction of inflammation. The major therapeutic approaches against endometrial cancer and endometriosis involve the suppression of inflammatory response. Korean Red Ginseng (KRG) is a natural product with anti-inflammatory and anti-carcinogenic properties. Thus, the purpose of this study is to investigate the effects of KRG on DEHP-induced inflammatory response in endometrial cancer Ishikawa cells and a mouse model of endometriosis. Methods: RNA-sequencing was performed and analyzed on DEHP-treated Ishikawa cells in the presence and absence of KRG. The effects of KRG on DEHP-induced cyclooxygenase-2 (COX-2) mRNA levels in Ishikawa cells were determined by RT-qPCR. Furthermore, the effects of KRG on the extracellular signal-regulated kinases (ERKs) pathway, COX-2, and nuclear factor-kappa B (NF-kB) p65 after DEHP treatment of Ishikawa cells were evaluated by western blotting. In the mouse model, the severity of endometriosis induced by DEHP and changes in immunohistochemistry were used to assess the protective effect of KRG. Results: According to the RNA-sequencing data, DEHP-induced inflammatory response-related gene expression was downregulated by KRG. Moreover, KRG significantly inhibited DEHP-induced ERK1/2/NF-κB/COX-2 levels in Ishikawa cells. In the mouse model, KRG administration significantly inhibited ectopic endometriosis growth after DEHP-induced endometriosis. Conclusions: Overall, these results suggest that KRG may be a promising lead for the treatment of endometrial cancer and endometriosis via suppression of the inflammatory response.

• Mycobiology
• /
• 제51권2호
• /
• pp.94-108
• /
• 2023

Termitomyces sp. that grow in symbiosis with fungus-farming Termites have medicinal properties. However, they are rare in nature, and their artificial culture is challenging. The expression of AXL receptor tyrosine kinase and immune checkpoint molecules favor the growth of cancer cells. The study evaluated the optimal conditions for the artificial culture of Termitomyces and their inhibitory activity on AXL and immune checkpoint molecules in lung adenocarcinoma and melanoma cell lines. The culture of 45 strains of Termitomyces was compared. Five strains with marked growth rates were selected. Four of the selected strains form a single cluster by sequence analysis. The mycelium of 4 selected strains produces more fungal mass in potato dextrose broth than in a mixed media. The bark was the most appropriate solid substrate for Termitomyces mycelia culture. The mycelium of all five selected strains showed a higher growth rate under normal CO₂ conditions. The culture broth, methanol, and ethyl acetate of one selected strain (T-120) inhibited the mRNA relative expression of AXL receptor tyrosine kinase and immune checkpoint molecules in cancer cell lines. Overall, these results suggest the potential usefulness of Termitomyces extracts as a coadjuvant therapy in malignant diseases.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권1호
• /
• pp.49-54
• /
• 2014

Background: Hydrogels are a class of polymers that can absorb water or biological fluids and swell to several times their dry volume, dependent on changes in the external environment. In recent years, hydrogels and hydrogel nanocomposites have found a variety of biomedical applications, including drug delivery and cancer treatment. The incorporation of nanoparticulates into a hydrogel matrix can result in unique material characteristics such as enhanced mechanical properties, swelling response, and capability of remote controlled actuation. Materials and Methods: In this work, synthesis of hydrogel nanocomposites containing magnetic nanoparticles are studied. At first, magnetic nanoparticles ($Fe_3O_4$) with an average size 10 nm were prepared. At second approach, thermo and pH-sensitive poly (N-isopropylacrylamide -co-methacrylic acid-co-vinyl pyrrolidone) (NIPAAm-MAA-VP) were prepared. Swelling behavior of co-polymer was studied in buffer solutions with different pH values (pH=5.8, pH=7.4) at $37^{\circ}C$. Magnetic iron oxide nanoparticles ($Fe_3O_4$) and doxorubicin were incorporated into copolymer and drug loading was studied. The release of drug, carried out at different pH and temperatures. Finally, chemical composition, magnetic properties and morphology of doxorubicin-loaded magnetic hydrogel nanocomposites were analyzed by FT- IR, vibrating sample magnetometry (VSM), scanning electron microscopy (SEM). Results: The results indicated that drug loading efficiency was increased by increasing the drug ratio to polymer. Doxorubicin was released more at $40^{\circ}C$ and in acidic pH compared to that $37^{\circ}C$ and basic pH. Conclusions: This study suggested that the poly (NIPAAm-MAA-VP) magnetic hydrogel nanocomposite could be an effective carrier for targeting drug delivery systems of anti-cancer drugs due to its temperature sensitive properties.

• BMB Reports
• /
• 제57권5호
• /
• pp.244-249
• /
• 2024

Many types of cancer are associated with excessive angiogenesis. Anti-angiogenic treatment is an effective strategy for treating solid cancers. This study aimed to demonstrate the inhibitory effects of (E)-2-methoxy-4-(3-(4-methoxyphenyl) prop-1-en-1-yl) phenol (MMPP) in VEGFA-induced angiogenesis. The results indicated that MMPP effectively suppressed various angiogenic processes, such as cell migration, invasion, tube formation, and sprouting of new vessels in human umbilical vein endothelial cells (HUVECs) and mouse aortic ring. The inhibitory mechanism of MMPP on angiogenesis involves targeting VEGFR2. MMPP showed high binding affinity for the VEGFR2 ATP-binding domain. Additionally, MMPP improved VEGFR2 thermal stability and inhibited VEGFR2 kinase activity, suppressing the downstream VEGFR2/AKT/ERK pathway. MMPP attenuated the activation and nuclear translocation of NF-κB, and it downregulated NF-κB target genes such as VEGFA, VEGFR2, MMP2, and MMP9. Furthermore, conditioned medium from MMPP-treated breast cancer cells effectively inhibited angiogenesis in endothelial cells. These results suggested that MMPP had great promise as a novel VEGFR2 inhibitor with potent anti-angiogenic properties for cancer treatment via VEGFR2/AKT/ERK/NF-κB signaling pathway.

• 생명과학회지
• /
• 제18권8호
• /
• pp.1140-1146
• /
• 2008

본 연구에서는 항균작용, 항암작용, 항산화작용이 있는 것으로 알려져 있는 마늘을 이용하여 소비자의 요구에 부합하는 기능성 전통 고추장 개발을 목표로 마늘죽을 첨가한 고추장을 제조한 후 이에 대한 성분 분석, 항산화능력 및 항암 능력을 살펴본 결과는 다음과 같다. 고추장의 품질 기준으로 평가되는 아미노태 질소함량분석 결과, 마늘죽 첨가 고추장이 시판 고추장에 비해 높은 것으로 나타났으며 숙련된 패널을 대상으로 관능 평가한 결과 생마늘 첨가 고추장이 색을 제외한 항목에 있어 마늘 특유의 향에 대한 거리감으로 인해 낮게 평가된 반면 마늘죽 형태로 첨가한 고추장의 경우 평가항목 모두에서 높은 점수를 얻었다. 질량 분석기를 이용하여 마늘죽 첨가 고추장을 정성 분석한 결과 diallyl disulfide (C6H10S2)와 diallyl trisulfide (C6H10S3)와 같은 유효 기능성 성분인 설파이드계 화합물이 존재하는 곳으로 확인되었다. 항산화 능력은 마늘죽 첨가고추장이 라디칼 소거능 및 환원력에 있어서 모두 시판 고추장에 비해 높은 것으로 조사되었으며 특히 MTT assay법으로 위암(MKN45), 대장암(HCT116), 폐암세포(NCI-H460)를 대상으로 항암효과를 조사한 결과 마늘죽 첨가 고추장의 경우 모든 암세포에 대해 항암효과가 있는 것으로 나타났으며 특히 위암(MKN45)세포에 대한 항암효과가 가장 높은 것으로 나타났다. 결론적으로, 마늘죽 첨가 고추장(마늘 함량 23%, w/w)이 시판 고추장 및 생마늘 첨가 고추장(마늘 함량 10%, w/w)보다 항산화 및 항암효과가 높은 이유는 마늘 함유량이 높기 때문으로 생각된다.

• 미생물학회지
• /
• 제51권2호
• /
• pp.156-168
• /
• 2015

Lactobacillus acidophilus BK13과 Lactobacillus paracasei BK57 균주로부터 얻은 세포, 배양상등액 및 박테리오신 용액의 anti-Helicobacter pylori 활성과 위장상피세포에 대한 세포독성을 평가하였다. 실험균주를 MRS 배지 상에서 30시간 배양한 결과, L. acidophilus BK57 ($126.8{\pm}7.9mM$) 보다 L. paracasei BK57 ($155.9{\pm}7.9mM$)가 더 많은 양의 유산을 생산하였다. 또한, BK13 균주의 최대 박테리오신 활성(128 AU/ml)은 $37^{\circ}C$에서 30시간 배양 후 관찰되었으나, 이는 BK57의 활성(256 AU/ml) 보다는 낮았다. BK13 및 BK57 균주의 살아있는 세포를 H. pylori와 혼합 배양한 결과, 유산균의 초기균수에 의존하여 H. pylori의 저해효과가 나타났다. 게다가 BK13과 BK57로부터 얻은 배양상등액과 박테리오신은 H. pylori의 성장을 억제할 뿐만 아니라 위장상피세포에 대한 부착력과 urease 활성도 저해하였다. 한편, 이러한 균주들이 생산한 유산은 위암세포에 대한 세포독성 효과가 대조구보다 유의한 수준으로 높게 나타났다. 따라서 BK13과 BK57 균주의 항균물질은 위장질환의 원인균인 H. pylori를 저해시키는데 효과적이므로 이들 유산균은 H. pylori 감염으로부터 위장을 보호하는데 유용할 것으로 사료된다.

• 생명과학회지
• /
• 제20권12호
• /
• pp.1872-1881
• /
• 2010

본 연구에서는 대두(FS)와 아가콩의 발효추출물(FYA)의 항암활성 기전을 확인하기 위해 AGS 인체위암세포의 증식에 미치는 영향을 조사하였다. AGS 세포에서 FS 및 FYA 처리로 인하여 암세포의 증식이 처리 농도 의존적으로 강하게 억제하였고, apoptosis 유발을 의미하는 세포의 전반적인 형태 및 핵의 변형 또한 동반하였다. 또한 세포주기 분석을 통하여 이 현상이 apoptosis 유도에 의한 것임을 확인하였다. AGS 세포에 처리된 FS 및 FYA는 pro-apoptotic factor인 Bax의 발현 증가를 통한 intrinsic pathway나, death receptor 관련 유전자의 발현 증가를 통한 extrinsic pathway를 활성화시키며, 더 나아가서 IAP family인자의 발현 억제 및 caspases의 활성 증가를 일으켜 apoptosis를 유발시키는 것을 유추할 수 있었는데, 이러한 효과들은 FS보다 FYA에서 더욱더 탁월하였다. 이는 향후 아가콩 발효추출물이 항암치료를 위한 적용 가능성이 매우 우수함을 제시하여 주는 결과이다.

• 생명과학회지
• /
• 제25권1호
• /
• pp.93-100
• /
• 2015

Pachymic acid는 복령에서 분리된 lanostane-type인 triterpenoid의 일종이다. 최근 pachymic acid가 항암 및 항염증 효능과 산화적 스트레스에 대한 항산화 효능 등과 같은 약리적인 효능이 있는 것으로 밝혀지고 있으나, 그에 대한 구체적인 분자생물학적 기전 연구는 매우 미비한 실정이다. 본 연구에서는 pachymic acid의 항암활성 및 관련 기전 조사의 일환으로 T24 인체 방광암세포 모델을 이용하여 pachymic acid에 의한 apoptosis 유발 여부를 검증하였다. 본 연구의 결과에 의하면 pachymic acid는 T24 세포의 증식을 유의적으로 억제시켰으며, 이는 apoptosis 유발과 연관성이 있음을 다양한 방법으로 확인하였다. Pachymic acid에 의한 apoptosis 유도에는 pro-apoptotic 인자들의 발현 증가와 anti-apoptotic 유전자 산물들의 발현 감소가 동반되었으며, MMP의 소실과 tBid의 발현 증가가 관찰되었다. 아울러 pachymic acid는 extrinsic 및 intrinsic apoptosis 경로의 개시에 관여하는 caspase-8 및 -9의 활성뿐 만 아니라, caspase-3의 활성도 증가시킴으로서 PARP와 같은 기질 단백질의 단편화를 초래하였다. 따라서 pachymic acid는 항암활성을 지니는 천연생리활성 물질로서의 잠재력이 매우 높음을 알 수 있었다.