• 한국미생물·생명공학회지
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• 제21권3호
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• pp.247-255
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• 1993

Antitumor activity of Lactobacillus casei YIP 9018(LC9018) was studied in mice by using sarcoma 180(S-180) and Lewis lung carcinoma (3LL). Following the eatablishment of in vivo tumor models such as ascites form S-180, solid form S-180 and 3LL for estimating antitumor activity of Lactobacilli, optimal dose and injection route of heat-killed LC9018 for supperssion of local tumor were examined. Administration of 100ng/mouse of LC9018 significantly inhibited the growth of ascites form S-180, solid form S-180 and 3LL.

• Journal of Microbiology and Biotechnology
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• 제12권3호
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• pp.503-507
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• 2002

Chitosan oligosaccharides (COSs) were prepared and fractionated into three groups of COS [a high molecular weight COS (HMWCOS), medium molecular weight COS (LMWCOS), and low molecular weight COS (LMWCOS)] according to their molecular weight, using an ultrafiltration membrane enzymatic bioreactor designed earlier [8]. Antitumor activity of these COSs was then examined against Sarcoma 180 solid (S180) or Uterine cervix carcinoma No. 14 (Ul4) tumor cell-bearing mice. Among these COSs, MMWCOS with molecular weight range from 1.5 to 5.5 kDa effectively inhibited the growth of both tumor cells in the mice. In addition, the administration of MMWCOS resulted in increased thymus weight among lymphoid organs. The mice treated with MMWCOS showed improved survival rate and larger number of survivors after 40 days of feeding. The most effective of MMWCOS far antitumor activity in the S180- or U14-bearing mice was 20 mg/kg/day or more.

• 한국미생물·생명공학회지
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• 제22권3호
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• pp.322-328
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• 1994

Antitumor and immunoadjuvant activities of Bifidobacterium adolesentis ATCC-15703 were investigated against the ascites and solid forms of tumor induced by Sarcoma 180(S-180) in ICR mice. When 100 $\mu$g of the bacterium was intraperitonealy administered in the mice, the survival rate(T/C %) of the mice was 132% for 50 days after the inoculation of S-180, however the increment of their body weights was suppressed. When the 100 $\mu$g was subcutaneously adminis- tratered at the right grion, the suppresion rate of the tumor growth on the 21st day after inoculation of S-180 were 62.3%. Complete supression of the tumor growth was observed from 2 out of 8 test mice. The bacterium itself appeared to have noncytotoxic substance against the S-180 in vitro. The bacteria] administration markedly enhanced the activity of peritoneal macrophages. The num- ber of peritoneal macrophages at one day after the administration of the 100 $\mu$g increased about 8 times as much as that of the control, and the highest activity of acid phosphatase appeared at 2 days.

• 대한수의학회지
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• 제33권4호
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• pp.701-710
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• 1993

The pine needles, Pinus densiflow Sieb. et Zucc., which is a feed for goats showing a low incidence rate of cancer were evaluated to confirm the potent anticancer effects, with or without several conventional anticancer drugs. The pine needles collected from Mt. Buk-Han located near Seoul were extracted with 95% methanol and methand and concentrated. From the methanol extract, SOM-A, was extracted dichlormethane and SOM-B was extracted with ethyl acetate. SOM-C was extracted with distilled water. These extracts were tested for their antitumor activities in vitro and in vivo. Among them, SOM-A and SOM-C exhibited potent antitumor activities described as belows. 1. The cytotoxic effects of SOM-A and SOM-C were examined against in vitro cultured murine and humman tumor cells. SOM-A showed strong cytotoxicity against human tumor cell lines and SOM-C showed strong cytotoxicity against murine tumor cell lines tested. 2. The antitumor effects of SOM-A and SOM-C were examined against P388 and L1210 of mouse ascitic tumors. The highest mean survival time(MST) ration was 151%(P388) for SOM-C(90mg/kg). 3. To compare the antitumor effects of SOM-A, SOM-B, and SOM-C against solid tumors, S-180 and Ehrlich carcinoma were implanted subcutaneously to mice on Day O. The drugs were given intraperitoneally to mice once a day on Days 1-20, and the tumor weights were measured on Day 21. SOM-A showed inhibition of tumor growth more than 50% in the experiment on S-180 and Ehrlich, and SOM-C also markedly inhibited tumor growth. However, SOM-B had no effect. 4. SOM-C combined with ${\alpha}$-interferon and SOM-C combined with Mitomycin-C enhanced the antitumor activities against murine ascitic tumors P388 leukemia.

• 약학회지
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• 제38권2호
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• pp.174-178
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• 1994

Isoguanosine and berberine 1:1 mixture[l:[1(mole:mole)] has been prepared and evaluated by measuring antitumor effects against various tumor cell lines in culture and in mice. We reported that the synergistic effect of isoguanosine and berberine mixture has been revealed compared with each of isoguanosine and berberine increased by $3{\sim}8$ times than that of each components in various tumor cell lines in vitro. The most effective dose of isoguanosine and berberine mixture was 60 mg/kg/day in mice bearing S-180 solid tumor, the %(1-T/C) values were 70%. Against the P-388 leukemia, isoguanosine-berberine mixture was the most effective at the dose of 60 mg/kg/day, the %T/C values were 163%.

• Asian Pacific Journal of Cancer Prevention
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• 제14권2호
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• pp.1067-1072
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• 2013

Hiwi, a human homologue of the Piwi family, plays an important role in stem cell self-renewal and is overexpressed in various human tumors. This study aimed to determine whether an RNA interference-based strategy to suppress Hiwi expression could inhibit tumor growth in a xenograft mouse model. A rare population of $SSC^{lo}\;Alde^{br}$ cells was isolated and identified as lung cancer stem cells in our previous study. Plasmids containing U6 promoter-driven shRNAs against Hiwi or control plasmids were successfully established. The xenograft tumor model was generated by subcutaneously inoculating with lung cancer stem cell $SSC^{lo}\;Alde^{br}$ cells. After the tumor size reached about 8 mm in diameter, shRNA plasmids were injected into the mice via the tail vein three times a week for two weeks, then xenograft tumor growth was assessed. In nude mice, intravenously delivery of Hiwi shRNA plasmids significantly inhibited tumor growth compared to treatment with control scrambled shRNA plasmids or the vehicle PBS. No mice died during the experiment and no adverse events were observed in mice administered the plasmids. Moreover, delivery of Hiwi shRNA plasmids resulted in a significant suppressed expression of Hiwi and ALDH-1 in xenograft tumor samples, based on immunohistochemical analysis. Thus, shRNA-mediated Hiwi gene silencing in lung cancer stem cells by an effective in vivo gene delivery strategy appeared to be an effective therapeutic approach for lung cancer, and may provide some useful clues for RNAi gene therapy in solid cancers.

• Parasites, Hosts and Diseases
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• 제47권2호
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• pp.175-177
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• 2009

Cancer is the main cause of death in developed countries. However, in underdeveloped countries infections and parasitic diseases are the main causes of death. There are raising scientific evidences indicating that parasitic infections induce antitumor activity against certain types of cancers. In this study, the effects of Toxoplasma gondii and Toxocara canis egg antigens in comparison with Bacillus Calmette Guerin (BCG) (known to have anticancer distinctive) on WEHI-164 fibosarcoma transplanted to BALB/c mice was investigated. Groups of 6 male BALB/c mice injected with T. gondii antigen, BCG, or T. canis egg antigen as case groups and alum alone as control groups. All mice were then challenged with WEHI-164 fibrosarcoma cells. The mice were examined for growth of the solid tumor and the tumor sizes were measured every other day up to 4wk. The mean tumor area in T. gondii, BCG, or alum alone injected mice in 4 different days of measurements was $25\;mm^2$, $23\;mm^2$, and $186\;mm^2$ respectively, Also the mean tumor area in T. canis injected mice in 4 different days was $25.5\;mm^2$ compared to the control group (alum treated) which was $155\;mm^2$. T. gondii parasites and T. canis egg antigens induced inhibition of the tumor growth in the fibrosarcoma mouse model. We need further study to clarify the mechanisms of anti-cancer effects.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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• pp.224.2-224.2
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• 2002

• Asian Pacific Journal of Cancer Prevention
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• 제17권9호
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• pp.4367-4375
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• 2016

The objective of the present study was to evaluate the anticancer and radio-sensitizing efficacy of a Withania somnifera extract/Gadolinium III oxide nanocomposite (WSGNC) in mice. WSGNC was injected to solid Ehrlich carcinoma-bearing mice via i.p. (227 mg/kg body weight) 3 times/week during 3 weeks. Irradiation was performed by whole body fractionated exposure to 6Gy, applied in 3 doses of 2 Gy/week over 3 weeks. Biochemical analyses as well as DNA fragmentation were performed. Treatment of solid Ehrlich carcinoma bearing mice with WSGNC combined with ${\gamma}$-radiation led to a significant decrease in the tumor size and weight associated with a significant decrease in mitochondrial enzyme activities, GSH content and SOD activity as well as a significant increase in caspase-3 activity, MDA concentration and DNA fragmentation in cancer tissues. Combined treatment of WSGNC and low dose of ${\gamma}$-radiation showed great amelioration in lipid peroxidation and antioxidant status (GSH content and SOD activity) in liver tissues in animals bearing tumors. It is concluded that WSGNC can be considered as a radio-sensitizer and anticancer modulator, suggesting a possible role in reducing the radiation exposure dose during radiotherapy.

• Asian Pacific Journal of Cancer Prevention
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• 제15권6호
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• pp.2883-2888
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• 2014

Background: Realgar which contains arsenic components has been used in traditional Chinese medicine (TCM) as an anticancer drug. However, neither Realgar nor its formula are soluble in water. As a result, high dose of Realgar has to be administered to achieve an effective blood medicine concentration, and this is associated with adverse side effects. The objective of the present study was to increase the solubility of a formula using hydrometallurgy technology as well as investigating its effects on in vitro and in vivo cell proliferation and apoptosis in Sarcoma-180 cell line. Materials and Methods: Antiproliferative activity of Realgar Bioleaching Solution (RBS) was evaluated by MTT assay. Further, effects of RBS on cell proliferation and apoptosis were studied using flow cytometry and transmission electron microscopy. Kunming mice were administered RBS in vivo, where arsenic specifically targeted solid tumors. Results: The results indicated that RBS extract potently inhibited the tumor growth of Sarcoma-180 cell line in a dose-dependent manner. Flow cytometry and transmission electron microscopy further indicated that RBS significantly induced cell apoptosis through the inhibition of cell cycle pathway in a dose-dependent manner. Further, on RBS administration to mice, arsenic was specifically targeted to solid tumor.s Conclusions: RBS could substitute for traditional Realgar or its formula to work as a potent tool in cancer treatment.