• 한국수산과학회지
• /
• 제47권6호
• /
• pp.770-775
• /
• 2014

The green microalga of the genus Nannochloropsis (class Eustigmatophyceae) is a leading candidate for biofuel production due to its ability to accumulate high oil content (28.7% of cellular ash-free dry weight). We investigated the anti-inflammatory and anticancer activities of sterol-rich fraction from nannochloropsis oculata n-hexane (NOH) extract after saponification of the microalga. Among the fractions with n-hexane, chloroform and ethyl acetate, the n-hexane fraction showed the highest anti-inflammatory activity in LPS-stimulated RAW 264.7 macrophage as well as anticancer activity against human leukemia HL-60 cells without the cytotoxity. And the sterol-rich fraction was obtained from the n-hexane fraction by open silica column under the gradient solvent condition with 100% hexane (1L), hexane : ethyl acetate (20 : 1, 10 : 1, 5 : 1, 1 : 1, v/v). Among the four fractions (NOH-1~4), especially NOH-1 contained the highest content of sterols. NOH1 showed the highest HL-60 (about 85%) and NO inhibitory activities at the concentration of $100{\mu}g/mL$. These results demonstrated that the sterol-rich fraction from N. oculata might be a useful candidate as anti-inflammatory and anticancer agents for anti-inflammatory and anticancer activity.

• 한국약용작물학회지
• /
• 제12권4호
• /
• pp.273-278
• /
• 2004

한국산 생약재인 가시오갈피 , 마황, 복분자, 인진쑥을 이용하여 추출과정 중 $40^{\circ}C,\;60^{\circ}C,\;100^{\circ}C$로 온도를 달리 하여 기존의 열수 추출방법과 초음파를 범행한 추출로 인해 면역 활성 증진이 다르게 나타나는 효과를 비교 실험하였다. 실험 결과 여러 조건 중 복분자 $60^{\circ}C$, 40 kHz의 초음파 병행 추출물이 가장 좋은 항암활성 증진 효과를 나타내었다. 추출시 모든 열수 추출물들에 비해 초음파 병행 추출물의 추출 수율이 높게 나타났다. 이는 추출시 열수 추출에서 미쳐 빠져나오지 않았던 여러 활성 물질이 초음파 처리에 의해 공동화현상과 더불어 액체간의 상호 탈기 작용에 의해 추출 수율의 상승효과를 가져온 것으로 사료된다. Apoptosis 실험에서는 5일 동안 인간 폐암 세포인 A549의 세포를 이용하여 활성이 좋았던 마황과 복분자의 $60^{\circ}C$ 열수 추출물과 초음파 추출을 병행한 추출물을 이용하여 관찰한 결과 apoptotic이 열수 추출물보다는 초음파 병행 추출물을 투여한 군에서 더 많이 관찰되는 것을 볼 수 있었다. 이와 마찬가지로 HL-60 세포분화능 실험에서도 열수 추출물보다는 초음파를 병행한 추출물들이 높은 세포 분화 활성도를 나타냈다. 또한 모든 조건 중에서 생약재들이 $60^{\circ}C$, 40 kHz 초음파 병행 추출물에서 가장 높은 세포 분화 활성도를 나타냈다. 이러한 결과로 보아, 앞으로 한국산 생약재의 고부가가치 창출을 위해 더 많은 실험을 통하여 초음파의 병행 처리에 따른 효과와 이를 통한 기능성 소재 및 기능성 식품으로의 이용을 위해 더 많은 연구가 이루어져야 할 것으로 생각되어진다.

• Molecules and Cells
• /
• 제38권6호
• /
• pp.482-495
• /
• 2015

Sphingolipids such as ceramide, sphingosine-1-phosphate and sphingomyelin have been emerging as bioactive lipids since ceramide was reported to play a role in human leukemia HL-60 cell differentiation and death. Recently, it is well-known that ceramide acts as an inducer of cell death, that sphingomyelin works as a regulator for microdomain function of the cell membrane, and that sphingosine-1-phosphate plays a role in cell survival/proliferation. The lipids are metabolized by the specific enzymes, and each metabolite could be again returned to the original form by the reverse action of the different enzyme or after a long journey of many metabolizing/synthesizing pathways. In addition, the metabolites may serve as reciprocal biomodulators like the rheostat between ceramide and sphingosine-1-phosphate. Therefore, the change of lipid amount in the cells, the subcellular localization and the downstream signal in a specific subcellular organelle should be clarified to understand the pathobiological significance of sphingolipids when extracellular stimulation induces a diverse of cell functions such as cell death, proliferation and migration. In this review, we focus on how sphingolipids and their metabolizing enzymes cooperatively exert their function in proliferation, migration, autophagy and death of hematopoetic cells, and discuss the way developing a novel therapeutic device through the regulation of sphingolipids for effectively inhibiting cell proliferation and inducing cell death in hematological malignancies such as leukemia, malignant lymphoma and multiple myeloma.

• 대한한방내과학회지
• /
• 제19권2호
• /
• pp.261-277
• /
• 1998

The purpose of this research was to investigate cytotoxicity of DangkwiYonghoe-Hwan(DYH) and the constitutive crude drugs on several cancer cell-lines, thymocytes, splenocytes and 3T3 cells. The DYH consists of Coptidis Rhizoma, Scutellariae Radix, Phellodendri Cortex, Gardeniae Fructus, Gentianae scabrae Radix, Indigo pulverata Levis, Aloe, Rhei Rhizoma, Moschus, Saussureae Radix and Angelicae Gigantis Radix. The cytotoxicity was determined by MTT method. The DYH inhibited the proliferation of MOLT-4, K562, HL-60, Jurkat, L1210, P815, S180 and Yac-1, thymocyte, splenocyte and 3T3 cells. The cytotoxicity of Coptidis Rhizoma on the cancer cell-lines was the most potent in the constitutive crude drugs. The proliferation of cancer cell-lines was partly inhibition and partly increase by the treatment of Scutellariae Radix, Gardeniae Fructus, Gentianae scabrae Radix, Indigo pulverata Levis, Aloe, Rhei Rhizoma, Moschus and Angelicae Gigantis Radix. Phellodendri Cortex and Saussureae Radix had a poor cytotoxicity on cancer cell-lines. Coptidis Rhizoma and Phellodendri Cortex inhibited the proliferation of thymocyte, splenocyte and 3T3 cells.

• 한국환경성돌연변이발암원학회지
• /
• 제19권1호
• /
• pp.56-62
• /
• 1999

Resveratrol (3,5,4'-trihydroxy-trans-stilbene) has been considered to be as one of major antioxidants present in grapes responsible for beneficial effects of red wine consumption on coronary heart disease. This triphenolic stilbene has been suggested as a potential cancer chemopreventive agent based on its striking inhiitory effects on diverse cellular events associated with tumor initiation, promotion, and progression. The compound has strong antioxidative and anti-inflammatory activities which amy contribute to its chemopreventive/chemoprotective properties. In the present work, we have found that resveratrol reduces viability and DNA synthesis capability of cultured human promyelocytic leukemia (HL-60) cells. Likewise, the viability of human breast cancer cell line, MCF-7 was reduced by resveratrol treatment. The growth inhibitory and antiproliferative properties of resveratrol appear to be associated with its induction of apoptotic cell death as determined by morphological and ultrastructural changes, agarose gel electrphoretic analysis of internucleosomal DNA fragmentation, and in situ terminal end-labeling of fragmented DNA (TUNEL). This compound also inhibited the phorbol ester-induced expression of cyclooxygenase-2 (COX-2) protein in immortalized human mammary epithelial MCF-10A cells. These results suggest that resveratrol has the promising cancer therapeutic/chemopreventive potential.

• Natural Product Sciences
• /
• 제27권3호
• /
• pp.176-182
• /
• 2021

The phytochemical investigation of Broussonetia kazinoki roots led to the isolation of ten compounds, including six flavonoids (1-6), two lignans (7 and 8), and two coumarins (9 and 10) by comparing their ¹H and ¹³C NMR spectra with reference values. To the best of our knowledge, compounds 9 and 10 were isolated from this plant for the first time. Among the ten isolates, compounds 2, 4, and 6 exhibited inhibitory effects against lipopolysaccharide (LPS)-induced nitric oxide (NO) production in macrophage RAW264.7 cells with IC₅₀ values of 11.98, 10.16, and 24.06 μM, respectively. Furthermore, compounds 2, 4, and 6 reduced LPS-induced inducible nitric oxide synthase (iNOS) expression in a dose-dependent manner. Pre-incubation of cells with these compounds also significantly suppressed LPS-induced COX-2 protein expression. Compounds 2, 4, and 6 also showed cytotoxic activity against HL-60 cells with IC₅₀ values ranging between 46.43 and 94.06 μM.

• Natural Product Sciences
• /
• 제13권2호
• /
• pp.123-127
• /
• 2007

We investigated effect of small black soybean fraction (SBSF) T cell-mediated responses for tumor surveillance and proliferation in leukemia cells in vitro. Each SBSF butanol fraction (SBSFBu) and SBSF chloroform fraction (SBSFCh) was administered p.o. once a day far 21 days in BALB/c mice and then levels of serum cytokines and subpopulation of lymphocytes were measured. Moreover, SBSF fraction was treated into the cultured various cell lines for proliferation in leukemia cell lines, NO production by RAW264.7 cells, and expression of p53 gene in U937 leukemia cells. These results showed that SBSFBu increased levels of serum IL-4but not IL-2 and IFN-${\gamma}$, and increased expression of CD4$^+$ T cells and CD8$^+$ T cells in splenocytes in vivo, while SBSFCh increased levels of serum IL-2 and IFN-${\gamma}$ but decreased IL-4, and increased CD8$^+$ T cells but not CD4$^+$ T cells. Moreover, both of SBSFBu and SBSFCh inhibited proliferation of HL60, U937, and L1210 leukemia cell lines in a dose-dependent manner, up-regulated NO production by RAW264.7 cells in a dose-dependent manner, and enhanced expression of p53 gene in U937 leukemia cells. Our findings indicate that SBSFBu and SBSFCh may enhance T cell-dependent immune responses, and that both of SBSFBu and SBSFCh may inhibit proliferation of leukemia cells by up-regulation of NO production and expression of p53 gene.

• Biomolecules & Therapeutics
• /
• 제16권4호
• /
• pp.410-415
• /
• 2008

Previously, we identified albumin as an inhibitory factor in serum for cell adhesion of T cells such as human Jurkat T and primary cultured human T cells. In the present study, we found that other hematopoietic cell lines including U-937 human monocytes, THP-1 human monocytes, K-562 promyelocytic leukemia cells, and HL-60 human leukemia cells, also adhere to tissue culture flasks when serum is withdrawn, and albumin exerts an inhibitory effect on cell adhesion by those cells, implying that this inhibition is a common phenomenon in hematopoietic cells. Furthermore, we found that cell adhesion is inhibited by antioxidants such as (-)-epigallocatechin- 3-gallate (EGCG), morin, and a-tocopherol. Our results suggest that albumin may inhibit basal cell adhesion of hematopoietic cells and that the oxidative balance in the plasma may be important for cell adhesion of hematopoietic cells in vivo.

• 산업기술연구
• /
• 제25권B호
• /
• pp.241-251
• /
• 2005

Exopolysaccharide (CBP) from submerged culture broth of Ganoderma lucidum mycelium and the water soluble (BWS) and water insoluble (BWI) fractions of CBP were prepared by gel filtration. Antitumor activity and effects on proliferation and differenciation of human cancer cells and mouse NIH 3T3 cells were studied. Cytotoxicity test of CBP, BWS and BWI fractions on human cancer cell lines was performed by using sulforhodamine B (SRB) assay. A549 (lung carcinoma), Colo320 DM and HSR (colon carcinoma), and NIH 3T3 cells were used. BWI fraction showed the strongest cytotoxicity (maximum 20% survival) to all human cells tested. However it did not induced apoptosis. Interestingly BWI fraction did not exert cytotoxic effect on NIH 3T3 cells at low concentration of cells ($5{\times}10^4$) but strong toxic effect at high concentration of cells($5{\times}10^5$) which showed transformed morphology. These results suggest that BWI may have cancer cell specific anticancer activity. However, BWI fraction did not effect the amount of pRb and c-myc protein, which implied that BWI fraction did not act at the early stage of signal transduction pathway. CBP fraction induced differenciation of human leukemic cell line, HL-60 cells suggesting the carcinogenesis prevention of normal cell and possible induction of normalization for cancer cell.

• 생약학회지
• /
• 제47권3호
• /
• pp.197-203
• /
• 2016

Decursin is a major component of the root of Angelica gigas(Umbelliferae), which has been traditionally used in Korea as a tonic and to treat anemia, hemiplegia, and women's diseases. The objective of this study is to identify the anti-cancer mechanism induced by decursin on apoptosis of human leukemia and lymphoma cells. Cytotoxicity of decursin on U937, HL-60, MOLT-4, THP-1 cells showed the significant effects. First of all, $IC_{50}$ of decursin on four cell lines was 27.1, 32.4, 17.4, $15.1{\mu}M$, respectively. So $IC_{50}$ in THP-1 cells was the smallest among 4 cell lines treated with decursin($15.1{\mu}M$). In order to understand the apoptosis-mechanism by decursin, we examined the gene expression of bcl-2(anti-apoptotic), bax(pro-apoptotic) and p53(tumor suppressor)after treating the THP-1 cells with decursin(10, 50 and $100{\mu}M$). It was found bcl-2 gene was decreased dose dependently, the expression level of bax gene of THP-1 cells treated with $100{\mu}M$ of decursin was about 3 times higher than those of control, and p53 gene was increased In the same concentration($100{\mu}M$), p53 gene was increased dose dependent manner. In protein express, bcl-2 and p53 protein showed a tendency to decrease. bax was increased about 4 fold. Therefore decursin is a useful chemotherapeutic agent against leukemia.