• Biomedical Science Letters
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• v.20 no.3
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• pp.147-155
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• 2014

It has well studied that immune cells are strongly related to tumor progression and tumor suppression. To identify the difference of immune cell between tumor bearing mice and normal mice, we examined systemically the immune cell of CT26 tumor bearing mice on 21 days after tumor cell administration. As previously reported, CD4+ and CD8+ T cells population of tumor bearing mice significantly decreased 38% and 30% on day 21 compared to that of normal mice, respectively. All subpopulation of CD4 and CD8+ T cell significantly decreased, except CD49b+ T cell subpopulation. But, myeloid cell population ($CD11b^{high}$ and all Gr-1+ subpopulation) of tumor bearing mice significantly increased on day 21. Especially, all subpopulation of CD11b+Gr-1+ cell of tumor bearing mice significantly increased on day 21. Also, Foxp3+$CD25^{high}$ CD4 T cell (regulatory T cells) population significantly increased on day 21. These results suggest that tumor can induce the decline of T lymphocyte and the expansion of myeloid cells and regulatory T cells, and provide the basic information for the study of tumor immunology.

• Biomedical Science Letters
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• v.21 no.4
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• pp.172-180
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• 2015

It is well reported that tumor cells can regulate host immune systems. To identify the detailed changes of immune cells between tumor bearing mice and normal mice, we evaluated the systemic immune cell phenotype of B16F10 tumor bearing mice in a time dependent manner. The lymphocytic population (CD4+ and CD8+ T cells) of tumor bearing mice significantly decreased compared to that of normal mice. We found that the Foxp3+CD25+ CD4 T cell decreased, but the Foxp3+$CD25^{high}$ CD4 T cell significantly increased. All subpopulations of CD8 T cells decreased, except the CD62L-CD44+ CD8 T cell subpopulation. The myeloid cell population (CD11b+ and Gr-1+ cells) of tumor bearing mice significantly increased. Specifically, Foxp3+$CD25^{high}$ CD4 T cell and CD11b+Gr-1+ cells significantly increased in early phase of tumor progression. These results are helpful to understand the change of the systemic immune cell subpopulation of tumor bearing mice in a time-dependent manner.

• Toxicological Research
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• v.6 no.1
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• pp.21-28
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• 1990

This study was undertaken to evaluate the immune responses to sheep red blood cell (SRBC) and potential anti-tumor effect of Bacillus Calmette-Guerin (BCG) in the mice bearing rumor induced by DMBA. The frequencies of tumor appearances were 62% in DMBA-treated mice and 14% in DMBA and BCG-treated group, respectively. Cellular immune response such as delayed-type hypersensitivity (DTH) to SRBCs, natural killer (NK) cell activity and antigen-binding cell (ABC) assay were decreased apparently in the tumor bearing mice compared to the normal controls. Humoral immune responses such as hemagglutinin (HA) and hemolysin (HE) were noted to be reduced in the tumor bearing mice, but the spleen index increased in tumor bearing mice. All the immunological parameters in the DMBA and BCG-group appeared to be higher than those of only DMBA-treated group. These results indicated that DMBA-induced tumor suppressed host immune responses. Also, they imply the idea that BCG enhanced the immune responses of tumor-bearing host and antitumor effects.

• Advances in Traditional Medicine
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• v.7 no.5
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• pp.459-465
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• 2008

The present study was undertaken to investigate the effect of in vivo administration of neem oil intra-peritoneally (i.p.) to mice bearing a progressively growing transplantable T cell lymphoma of spontaneous origin, designated as Daltons lymphoma (DL), on the tumor growth. Mice were administered various doses of neem oil mixed in groundnut oil, which was used as a diluting vehicle or for administration to control DL-bearing mice. Administration of neem oil resulted in an acceleration of tumor growth along with a reduction in the survival time of the tumor-bearing host. Neem oil administered DL-bearing mice showed an augmented apoptosis in splenocytes, bone marrow cells and thymocytes along with an inhibition in the anti-tumor functions of tumor-associated macrophages. Thus this study gives an altogether a novel information that neem oil instead of the popular belief of being anti-tumor and immunoaugmentary may in some tumor-bearing conditions, behave in an opposite way leading to an accelarated tumor progression along with a collapse of the host's anti-tumor machinery. These observations will thus have long lasting clinical significance, suggesting caution in use of neem oil for treatment of cancer.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.23
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• pp.10469-10473
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• 2015

Background: Solanum nigrum L. has been used in traditional Chinese medicine because of its diuretic and antipyretic effects. The present research concerned effects of crude polysaccharides isolated from Solanum nigrum L. on erythrocyte membranes of tumor-bearing $S_{180}$ and $H_{22}$ in mice. Materials and Methods: Fluorescence-labeled red blood cell membranes were used with DPH fluorescence spectrophotometry to examine erythrocyte membrane fluidity, and colorimetry to determine degree of erythrocyte surface membrane blocking. Extent of reaction by tumor-bearing mice with the enzyme erythrocyte membrane bubble shadow detection of red cell membrane variation in the degree of closure before and after administration. Results: Solanum nigrum polysaccharide could significantly improve the $S_{180}$ and $H_{22}$ tumor-bearing mice erythrocyte membrane fluidity, compared with the control group, the difference was significant (p<0.01), SNL can significantly improve the red blood cell membrane and then $S_{180}$ tumor-bearing mice sealing ability, compared with the negative control group, the difference was significant(p<0.05, p<0.01). $H_{22}$ tumor-bearing mice can increase red cell membrane and then sealing ability, the difference was significant (p<0.05). Solanum nigrum polysaccharide degree of fluidity and blocking two transplanted tumors in mice restored the ability to raise the red cell membrane has a significant effect. Conclusions: Solanum nigrum L.-type mice transplanted tumor can affect the red blood cell membrane fluidity and re-closed, through the red cell membrane of red blood cells to enhance the immune function of the possibility of erythrocyte immunity against tumor formation garland provide experimental basis.

• Journal of Pharmaceutical Investigation
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• v.30 no.2
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• pp.127-131
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• 2000

Previously, we have reported an antitumor efficacy of liposomal N-(phosphon-acetyl)-L-aspartic acid (or PALA) in C-26 tumor bearing Balb/c mice, where PALA in liposome was administered one day after tumor inoculation. In this report, we have investigated the therapeutic potency of liposomal formulation of PALA, which was administered eight days after tumor inoculation in the same C-26 tumor bearing mice. The C-26 murine colon tumor inoculated mice were randomized for the in vivo therapy and the survival was measured after a single intraperitoneal injection of the drug. When the therapy was initiated eight days after tumor inoculation, DSPC-PALA at 150 mg/kg resulted in a significant increase in median survival time (MST) of 56% over the control group which received MES/HEPES buffer alone. However, none of the free PALA and DSPG-PALA liposome doses caused a statistically significant increase in MST over control group at the 95% confidence level. At 750 mg/kg dose, free PALA caused a marginally significant improvement in MST by 34%, but both 375 mg/kg and 150 mg/kg doses of free PALA caused only a 2% and a 4% increase in MST, respectively. These results show that PALA in neutrally charged liposome can exhibit considerably greater potency than free PALA in established C-26 tumor bearing mice.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.10
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• pp.4129-4133
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• 2014

Background: The objective was to study the effect of Scutellaria baicalensis Georgi ethanol extracts (SBGE) on immune and anti-oxidant function in U14 tumor-bearing mice. Materials and Methods: U14 tumor-bearing mice were randomly divided into eight groups: a control group, a cyclophosphamide (CTX) group, three dose groups of SBGEI (high, medium, low), and three dose groups of SBGEII (high, medium, low). After two weeks, the thymus and spleen weight indices of mice bearing U14 cervical cancer were calculated. Enzyme linked immunosorbent assays (ELISA) was used to determine the levels of serum IL-2, TNF-${\alpha}$, IL-8, and PCNA. MDA activity and SOD activity in plasma were measured with detection kits. Results: In the SBGE groups, thymus weight and spleen weight indices of U14 tumor-bearing mice were significantly higher than in the control group or CTX group (p<0.05). Compared to control group, the levels of serum IL-2 and TNF-${\alpha}$ in U14 tumor-bearing mice increased significantly, whereas the contents of serum IL-8 and PCNA decreased (p<0.05). The activity of SOD increased with the growing dose of SBGE, while the activity of MDA decreased significantly in the highe-rdose groups of SBGE. Conclusions: These findings suggested that SBGE, especially at high dose, 1000 mg/kg, showed significant immune and anti-oxidant effects infU14 tumor-bearing mice, which might be the mechanisms of SBGE inhibition of tumor growth.

• Advances in Traditional Medicine
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• v.3 no.2
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• pp.72-79
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• 2003

The present investigation was undertaken to study whether tumor-associated macrophages of Daltons lymphoma (DL), a spontaneous transplantable T cell lymphoma can be activated to tumoricidal state by alcoholic extract of Tinospora cordifolia (ALTC). In vivo administration of ALTC (200 mg/kg body weight) in DL-bearing mice resulted in an enhanced RNI production and an augmented cytotoxic response of tumor-associated macrophages. Earlier we had reported that DL-bearing mice show a regression of thymus and an enlargement of spleen. In vivo administration of ALTC to DL-bearing hosts resulted in a decrease in the weight of spleen and counts of splenocytes along with an increase in the weight of thymus as compared to control DL-bearing mice. In vivo administration of ALTC in DL-bearing mice also resulted in an increase in the proliferation of splenocytes/thymocytes and BMC. The results of this study indicate that the ALTC upon in vivo administration in DL-bearing shows immuno-modulatory effects and thus may have clinical significance.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.8
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• pp.3681-3686
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• 2014

In this study, we demonstrated selenium (Se) accumulation in Bifidobacterium longum strain (B. longum) and evaluated the effect of Se-enriched B. longum (Se-B. longum) on tumor growth and immune function in tumor-bearing mice. Analysis using high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS) revealed that more than 99% of Se in Se-B. longum was organic, the main component of which was selenomethionine (SeMet). In the in vivo experiments, tumor-bearing mice (n=8) were orally administrated with different doses of Se-B. longum alone or combined with cyclophosphamide (CTX). The results showed that the middle and high dose of Se-B. longum significantly inhibited tumor growth. When Se-B. longum and CTX were combined, the antitumor effect was significantly enhanced and the survival time of tumor-bearing mice (n=12) was prolonged. Furthermore, compared with CTX alone, the combination of Se-B. longum and CTX stimulated the activity of natural killer (NK) cells and T lymphocytes, increasing the levels of interleukin-2 (IL-2) and tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), and the leukocyte count of H22 tumor-bearing mice (n=12).

• Journal of Pharmaceutical Investigation
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• v.30 no.1
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• pp.39-45
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• 2000

We have investigated the efficacy of liposome encapsulated N-(phosphonacetyl)-L-aspartic acid (PALA) for the treatment of the C-26 murine colon tumor in Balb/c mice, and have compared it in this regard to free PALA. Healthy female Balb/c mice and C-26 tumor inoculated mice were randomized for the maximum tolerated dose (MTD) study and the in vivo therapy study, and the survival was measured after a single intraperitoneal injection of the drug. The maximum tolerated dose for intraperitoneally administered drug was found to be 750 mg/Kg for free PALA, and was greater than the maximum dose possible (150 mg/Kg) for PALA encapsulated in both DSPC and DSPG liposomes. When drug was administered one day after tumor implantation, 150 mg/Kg of PALA in DSPG liposomes increased the percentage of tumor bearing mice surviving at day 36 from 8% (buffer control) to 88%. In contrast, 150 mg/Kg free PALA increased the day 36 surviving percentage to only 25%. A 150 mg/Kg dose of PALA in DSPC liposomes increased the surviving percentage to 50%, while a 75 mg/Kg dose of PALA in sterically stabilized liposomes increased the surviving percentage to 78%. These results show that PALA in negatively charged or sterically stabilized liposomes can exhibit considerably greater potency than free PALA in C-26 tumor bearing mice.