• Title/Summary/Keyword: immunostimulation effect

Search Result 19, Processing Time 0.026 seconds

Immunostimulation Effects of Cell Wall Components Isolated from Lactobacillus plantarum

  • TAE BOO CHOE;KANG, KWAN YUEB;SUNG HO PARK
    • Journal of Microbiology and Biotechnology
    • /
    • v.4 no.3
    • /
    • pp.195-199
    • /
    • 1994
  • Immunostimulation effects of the cell wall components isolated from Lactobacillus plantarum were investigated by studying the macrophage s tumorcidal activity, splenocyte proliferation, anticomplementary activity and the inhibition of peritoneal tumor cell growth measured with ICR mice inoculated with sarcoma 180. The immunopotentiating cell wall components were a complex of peptidoglycan and exopolysaccharides. The tumorcidal activity of macrophage against Yacl and B16 tumor cells was enhanced when the cell wall components were added into the macrophage s culture medium. They also stimulated splenocytes to proliferate up to the same level as when the concanavalin A was added into the splenocyte's culture medium. The complementary activity was inhibited by 50% when the cell wall components were incubated with the sheep red blood cells treated with hemolysin and guinea pig complement. This result confirmed that the cell wall components had an antitumor effect, because the anticomplementary activity is usually accompanied by an antitumor activity at the same time. This fact was confirmed again by the inhibition of the growth of sarcoma 180 when the cell wall components were injected intraperitoneally into ICR mice inoculated with sarcoma 180. As a result, it is concluded that the cell wall components isolated from Lactobacillus plantarum had multifunctional immunostimulation effects in vitro and in vivo.

  • PDF

Immunostimulation Effects of Mice Fed with Cell Lysate of Lactobacillus plantarum Isolated from Kimchi (경구투영된 김치 유산균 파쇄액이 쥐의 면역활성에 미치는 효과)

  • 채옥화;신경섭;정호권;최태부
    • KSBB Journal
    • /
    • v.13 no.4
    • /
    • pp.424-430
    • /
    • 1998
  • Immunositmulation effects of the mice fed with the cell lysate of Lactobacillus plantarum isolated from Kimchi were studied. The mice group fed with cell lysate was different from the control group on the degree of immune responses, e.g. 1) proliferation of splenocytes and Peyer's patch cells, 2) production of nitric oxide (NO) by peritoneal macrophages, 3) production of intestinal secretory lgA (slgA), 4) variation of TNF-${\alpha}$ and IL-2 concentration in blood, 5) production of specific lgG against sheep red blood cells. A general enhancement in enteric and systemic immune responses was observed with a simple oral administration of immunostimulators. With the oral feeding of L. plantarum, not only the total amount of gut secretion antibody, but also the binding capacity of antibodies to the enteric microorganisms including L. plantarum was increased. These experimental results clearly showed that the oral feeding of immunostimulators gave multifunctional effects on the mucosal and systemic immune systems of mice.

  • PDF

Immunostimulation of C6 Glioma Cells Induces Nitric Oxide-Dependent Cell Death in Serum-Free, Glucose-Deprived Condition

  • Shin, Chan-Young;Choi, Ji-Woong;Ryu, Jae-Ryun;Ryu, Jong-Hoon;Kim, Won-Ki;Kim, Hyong-Chun;Ko, Kwang-Ho
    • Biomolecules & Therapeutics
    • /
    • v.8 no.2
    • /
    • pp.140-146
    • /
    • 2000
  • Recently, we reported that immunostimulation of primary rat cortical astrocyte caused stimulation of glucose deprivation induced apoptotic cell death. To enhance the understanding of the mechanism of the potentiated cell death of clucose-deprived astrocyte by immunostimulation, we investigated the effect of immunostimulation on the glucose deprivation induced cell death of rat C6 glioma cells. Co-treatment of C6 glioma cells with lipopolysaccharide (LPS, $1\;{\mu}\textrm{g}/ml$) and interferon ${\gamma}(IFN{\gamma},\;100U/ml)$ is serum free condition caused marked elevationo f nitric oxide production ($>50\;{\mu}M$). In this condition, glucose deprivation caused significant release of lactate dehdrogenase (LDH) from C6 glioma cells while control cells did not show LDH release. To investigate whether elevated level of nitric oxide is responsible for the enhanced LDH release in glucose-deprived condition, C6 glioma cells were treated with 3-morphorinosydnonimine (SIN-1) and it was observed that SIN-1 caused increase in LDH release from glucose-deprived C6 glioma cells. Treatment of C6 glioma cells with $25\;{\mu}M$ of pyrrolidinedithiocarbamate (PDTC) which inhibit Nuclear factor kB (NF-kB) activation, caused complete inhibition of nitric oxide production. Treatment of C6 glioma cells with NO synthase inhibitors, $N^{G}$-nitro-L-arginine (NNA) or L-$N{\omega}$-nitro-L-arginine methyl ester (L-NAME), caused inhibition of nitric oxide production and also glucose deprivation induced cell death of cytokine-stimulated C6 glioma cells. In addition, diaminohydroxypyrimidine (DAHP, 5 mM) which inhibits the synthesis of tetrahydrobiopterine (BH4), one of essential cofactors for iNOS activity, caused complete inhibition of NO production from immunostimulated C6 glioma cells. The results from the present study suggest that immunostimulation causes potentiation of glucose deprivation induced death of C6 glioma cells which is mediated at least in part by the increased production of nitric oxide. The vulnerability of immunostimulated C6 glioma cells to hypoglycemic insults may implicate that the elevated level of cytokines in various ischemic and neurodegenerative diseases may play a role in their pathogenesis.

  • PDF

Antitumor Activity of the Polysaccharide-Fraction(Copolang) from Coriolus versicolor and its Effects on the Immune Function (구름버섯의 항암성 다당류분획(Copolang)이 마우스의 면역기능에 미치는 영향에 관한 연구)

  • 문창규;이수환;목명수;김대욱
    • YAKHAK HOEJI
    • /
    • v.31 no.2
    • /
    • pp.126-132
    • /
    • 1987
  • Polysaccharide fraction isolated from Coriolus versicolor (Copolang) was studied on the antitumor activity and immunostimulation activities with reference to PS-K. Copolang showed nearly equal antitumor activities to the PS-K and exhibited marked augmentation effects on the antibody mediated hypersensitivity reaction, delayed type hypersensitivity reaction and NK-cell activity in tumor bearing mice. But it did not show any noticeable effect on the antibody secreting cell and macrophage function in normal mice. These results indicate that the antitumor activity and immunostimulating effect of Copolang are comparable to those of PS-K.

  • PDF

Immunostimulation Activity of the Crude Polysaccharides Fractionated from Eleutherococcus senticosus, and its Application to Prevent of Tumors by Combination Therapy with Cisplatin (오가피로부터 분리된 조다당 분획물의 면역자극활성 및 Cisplatin과의 병용에 의한 항암 상승작용의 유도)

  • 하은숙;황수현;유광원;신광순;조형민;김창한;박우문;윤택준
    • YAKHAK HOEJI
    • /
    • v.47 no.3
    • /
    • pp.159-166
    • /
    • 2003
  • In order to study the clinical usefulness of crude polysaccharides fractionated from Eleutherococcus senticosus, EN-3, in eliminating tumors, we have investigated the effect of combination therapy on the murine tumor metastasis and growth models. In experimental metastasis of colon26-M3.1 cells, prophylactic intravenous (i.v.) administration of EN-3 (0.5, 5, and 50 $\mu\textrm{g}$/mouse) inhibited tumor metastasis compared with tumor control group in 33.6, 66.8, and 81.8% respectively. The administration of EN-3 (50 $\mu\textrm{g}$/mouse) also exhibited a 66.1% therapeutic effect on lung tumor metastasis. Although EN-3 induced no toxic effect on both tumor cell and normal splenocyte in the concentration below 100 $\mu\textrm{g}$/mι in in vitro, it induced significant proliferating activity on normal splenocyte in the concentration-dependent manner. In an analysis of NK-cell activity, i.v. administration of EN-3 (4∼100 $\mu\textrm{g}$/mouse) significantly augmented NK cytotoxicity to YAC-1 tumor cells. The combination treatments of cisplatin (10 $\mu\textrm{g}$) and EN-3 (5 $\mu\textrm{g}$) induced synergistic effect on the inhibition of tumor metastasis in experimental tumor metastasis model produced by colon26-M3.1 cells. In addition, the combination treatments also exhibited prolongation of lifespan in S∼180 tumor bearing mouse for over the 60 days. Even though cisplatin (2.5 $\mu\textrm{g}$/mι) exhibited cytotoxicity to tumor cells and inhibited tumor growth over 95% in in vitro, combination treatment with EN-3 (20 $\mu\textrm{g}$/mι) was induced splenocyte proliferation and produced cytokines, such as TNF-$\alpha$, IL-1 and IL-12, from the macrophages. These results suggested that EN-3 stimulate immune system non-specifically and apply to the biological response modifiers (BRM) in chemo-immunotherapy for tumor prevention.

Glucose Deprivation and Immunostimulation Induced Death in Rat Primary Astrocytes is Mediated by Their Synergistic Effect on the Decrease in Cellular ATP Level

  • Choi, Ji-Woong;Yoo, Byoung-Kwon;Yoon, Seo-Young;Jeon, Mi-Jin;Ko, Kwang-Ho
    • Biomolecules & Therapeutics
    • /
    • v.12 no.1
    • /
    • pp.25-33
    • /
    • 2004
  • In this study we investigated whether ATP loss was involved in the potentiated death of immunostimulated rat primary astrocytes in glucose-deprived condition. Rat primary astrocytes immunostimulated with LPS plus IFN-${\gamma}$ for 48 h underwent death upon glucose deprivation, which dependent on the production of peroxynitrite. Intracellular ATP level synergistically decreased by glucose deprivation in immunostimulated astrocytes but not in control cells, and the loss of ATP occurred well ahead of the LDH release. The synergistic cell death and ATP loss by immunostimulation and glucose deprivation were inhibited by iNOS inhibitor (L-NAME and L-NNA) or peroxynitrite decomposition catalyst (also a superoxide anion scavenger), Mn(III)tetrakis(N-methyl-4'-pyridyl)porphyrin (MnTMPyP). Exogenous addition of peroxynitrite generator, SIN-l timedependently induced ATP loss and cell death in the glucose-deprived astrocytes. Depletion of intracellular glutathione (GSH) and dis겨ption of mitochondrial transmembrane potential (MTP) were also observed under same conditions. Supply cellular ATP by the addition of exogenous adenosine or ATP during glucose deprivation inhibited ATP depletion, GSH depletion, MTP disruption and cell death in SIN-l treated or immunostimulated astrocytes. This study showed that perturbation in the regulation of intracellular ATP level in immunostimulated astrocytes might make them more vulnerable to energy challenging stimuli.

Immunostimulating Effect of 1,2-Benzopyrone on Phagocytic Response of Canine Peripheral Blood Phagocytes (개 말초혈액 탐식세포의 탐식반응에 대한 1,2-benzopyrone의 면역자극 효과)

  • 신정화;나기정;양만표
    • Journal of Veterinary Clinics
    • /
    • v.21 no.1
    • /
    • pp.23-28
    • /
    • 2004
  • 1,2-benzopyrone has been shown to affect on the activation and stimulation of macrophage. To examine the immunostimulating effect of 1,2-benzopyrone on the phagocytic response of canine peripheral blood mononuclear cells (PBMC) as well as polymorphonuclear cells (PMN), the phagocytic activity of phagocytes was analyzed by flow cytometry system using FITC-labelled latex. The 1,2-benzopyrone did not show any direct effect on phagocytic response of PBMC and PMN. But it showed an enhanced effect on the phagocytic response of monocyte-rich cells fractioned by cell size from dot plot profile in flowcytometric cytography of PBMC. The phagocytic activity of these cells was also enhanced by addition of culture supernatant from PBMC treated with 1,2-benzopyrone. Similarly, the phagocytic activity of PMN but not PBMC in the same procedures was enhanced by culture supernatant from PBMC treated with 1,2-benzopyrone. However, the culture supernatant from PMN treated with 1.2-benzopyrone did not show the enhancing effect on phagocytic activity for monocyte-rich cells and PMN. These results, therefore, suggested that enhanced phagocytic activity of canine peripheral blood PMN and monocytes may be mainly mediated by humoral factor(S) released from PBMC treated with 1,2-benzopyrone.

The effect of polysaccharide isolated from the root of Acanthopanax koreanum on B cell activation

  • Han, S-B;Ahn, H-J;Yoon, Y-D;Kim, Y-H;Lee, J-J;Moon, J-S;Lee, C-W;Lee, K-H;Park, S-K
    • Proceedings of the Korean Society of Toxicology Conference
    • /
    • 2002.11b
    • /
    • pp.183-183
    • /
    • 2002
  • Many polysaccharides isolated from plants have been shown to enhance various immune responses in vivo and in vitro. Here we demonstrate that polysaccharide isolated from the root of Acanthopanax koreanum (AK) has a unique mode of immunostimulation with regard to its cell-type specificity.(omitted)

  • PDF

Immunostimulating Effect of Mycelium Extract of Phellinus linteus (상황버섯 균사체 추출물의 면역증진 효능)

  • Lee, Byung-Eui;Ryu, Shi-Yong;Kim, Eui-Han;Kim, Young-Hee;Kwak, Kyung-A;Song, Ho-Yeon
    • Korean Journal of Pharmacognosy
    • /
    • v.43 no.2
    • /
    • pp.157-162
    • /
    • 2012
  • In order to investigate the immunostimulating effect of mycelia extract of Phellinus linteus (PLM) on human monocyte THP-1 and rat peritoneal macrophage cell, we examined measuring cytokine secretion (IL-6 and TNF-${\alpha}$). The production of IL-6 and TNF-a in human monocyte THP-1 was slight increased dose-dependently when the cells were challenged with PLM for 72 hrs. It was also observed that the treatment of PLM with LPS augmented the production of IL-6 and TNF-a in human monocyte THP-1. It was also observed that the treatment of PLM with LPS augmented the production of IL-6 and TNF-${\alpha}$ in human monocyte THP-1. The production of IL-6 and TNF-${\alpha}$ in rat peritoneal macrophage was significantly enhanced when the cells were treated PLM with LPS for 72 hrs. Moreover, the proliferation rate of rat spleen cells was increased in a dose dependent manner as the cells were treated with PLM and Concanavalin A.

Antitumor Effects of Mice Fed with Cell Lysate of Lactobacillus plantarum Isolated form Kimchi (경구투여된 김치 유산균 파쇄액이 쥐의 항암효과에 미치는 영향)

  • 신경섭;채옥화;박인철;홍석일;최태부
    • KSBB Journal
    • /
    • v.13 no.4
    • /
    • pp.357-363
    • /
    • 1998
  • The antitumor effects of mice fed with cell lysate of Lactobacillus plantarum were studied. The abdominal cancer induced by Sarcoma-180 was markedly inhibited and the expected life span was extended by 60% for the Balb/c mice fed with L. plantarum cell lysate for two weeks. A similar result was obtained for the rat inoculated with Spontaneous Osteosarcoma(SOS). The primary tumor volume of SOS was reduced by 70% for the rats fed with L. plantarum cell lysate (100mg/kg/day) for one week before the inoculation of SOS, while only 42% for the rats fed with the same amount of cell lysate for one week after the inoculation of tumor cell line, SOS. As lung was the metastasis site of SOS, the weight of lung was measured to determine the degree of metastasis inhibition by the L. plantarum cell lysate feeding. The rats fed with cell lysate for one week showed a remarkable inhibition of lung metastasis by 63%(before) and 46%(after), respectively. These results indicate that the feeding of L. plantarum cell lysate to mouse or rat can induce a strong stimulation of mucosal or systemic immune system and these effects results in an efficient antitumor activity.

  • PDF