Background: Use of prebiotics in companion animal nutrition is often considered advantageous over probiotics because of the ease of handling, ability to withstand processing and storage etc. While most of the studies on prebiotic use in dogs have been done with processed food as basal diet, the response in relation to homemade diet feeding is not very well explored. Methods: The study was conducted to evaluate the effects of dietary mannanoligosaccharide (MOS) supplementation on nutrient digestibility, hindgut fermentation, immune response and antioxidant indices in dogs. Ten Spitz pups were divided into two groups: control (CON) with no supplementation, and experimental (MOS) wherein the basal diet was supplemented with MOS at 15 g/kg diet. All dogs were fed on a home-prepared diet for a period of 150 days. The study protocol included a digestion trial, periodic blood collection and analysis for lipid profile and erythrocytic antioxidants. Immune response of the animals was assessed towards the end of the feeding period. Results: Results revealed no significant (P > 0.05) variations in palatability score, intake and apparent digestibility of nutrients between the groups. Faecal score, faeces voided, faecal pH, concentrations of ammonia, lactate and short-chain fatty acids were comparable (P > 0.05) between the two groups. Cell-mediated immune response, assessed as delayed-type of hypersensitivity response, was significantly higher (P < 0.05) in the MOS group. The percent of lymphocyte sub-populations CD4+ and ratio of CD4+:CD8+ were also significantly (P < 0.05) higher in MOS group. The serum IgG levels were similar (P > 0.05) in both the groups. Supplementation of MOS lowered (P < 0.05) serum total- and LDL- cholesterol levels, when compared with the control group. The erythrocytic antioxidant indices were similar (P > 0.05) between the two groups. Conclusions: The results indicated that supplementation of MOS at the rate of 15 g/kg in the diet of dog augmented the cell-mediated immune response and serum lipid profile without any influences on digestibility of nutrients, hindgut fermentation and antioxidants indices.
In order to investigate the effect of Houttuynia cordata Thunb and Sanggukeum on immune function, the author performed this experimental study. Delayed type hypersensitivity (DTH) and rosette forming cells(RFC) for cell-mediated immune response, hemagglutinin (HA) titers, hemolysin (HL) titers and plaque forming cells (PFC) for humoral immune response, immunoglogbulin (Ig G) titer, splenic natural Killer cell activity (NKCA) carbon clearance for phagocytic function of MPS(mononuclear phagocyte system) and change of weight were measured in ICR mice. The results were summarized as follows ; 1. DTH was increased with statistical significance in all of the treated group as compared with the control group. 2. RFC was increased with statistical significance in case of Houttuynia cordata Thunb but in case of sanggukeum and gamisanggukeum valuable increase of RFC was not recognized as compared with the control group. 3. HA titers were increased with statistical significance in case of Houttuynia cordata Thunb but in cases of Sanggukeum and Gamisanggukeum HA titers were not recognized as compared with the control group. 4. HL titers were increased with statistical significance in case of Houttuynia cordata Thunb but in cases of Sanggukeum and Gamisanggukeum valuable increase of HL titer was not recognized as compared with the control group. 5. PFC was increased in all of the treated group but valuable increase of PFC was not recognized as compared with the controal group. 6. Ig G titers were increased in all of the treated group but valuable increase of Ig G titer was not recognized as compared with the control group. 7. NKCA was increased with statistical significance in case of Houttuynia cordate Thunb but in case of Sanggukeum and Gamisanggukeum valuable increase of NKCA was not recognized as compared with the control group. 8. Carbon clearance was increased with statistical significance in case of Sanggukeum but in case of Houttuynia cordata Thunb and Gamisanggukeum valuable increase of carbon clearance was not recognized as compared with the control group. 9. Change of weight was increased with statistical significance in all of the treated group. Through in vivo experimental study in ICR mice, Houttuynia cordata Thunb enhances the cell-mediated immune responce, the humoral immune responce and natural killer cell activity. And Houttuynia cordata Thunb enhances immune responce as compared with that plused Sanggukeum. Sanggukeum enhances carbon clearance and enhances a little cell-mediated immune responce, the humoral immune response and natural killer cell activity. According to the above results it seems Houttuynia cordata Thunb and Sanggukeum was able to use Infection, Inflammation and Tumor.
An experiment was conducted using 20 male buffalo calves to study the effect of vitamin E and selenium supplementation on their immune response and plasma ${\alpha}$-tocopherol and selenium status. These buffalo calves (10-12 months old, average body weight $75.30{\pm}2.20 $ kg) were randomly allotted to four treatments on the basis of their body weights and were fed on wheat straw and concentrate mixture to meet their nutrient requirements of 500 g/d body weight gain. The buffalo calves were fed either a control diet (neither supplemented with Se nor VE) or diets supplemented with Se at 0.3 ppm (+Se), DL-alpha tocopheryl acetate at 300 IU (+VE), and both DL-alpha tocopheryl acetate at 300 IU and Se at 0.3 ppm (+Se+VE). These experimental diets were fed for 180 days. Blood samples were collected at day 0 and subsequently at 45 day intervals up to 180 days of experimental feeding to monitor plasma ${\alpha}$-tocopherol and Se concentrations. To assess humoral immune response, all calves were sensitized with formalin inactivated Pasteurella multocida antigen at 135 days of experimental feeding and blood was collected on 0, 7, 14, 21 and 28 days post vaccination (DPV) to measure antibody production using indirect ELISA. Cell mediated immune response of calves was assessed after 180 days of experimental feeding by in vivo delayed type hypersensitivity (DTH) reaction using phytohaemaglutinin-P (PHA-P) as a mitogen. Results revealed that feeding of VE and Se improved the plasma levels of these nutrients. Plasma levels of Se were affected by supplementation of both VE (p<0.001) and Se (p<0.001); however, no interaction ($Se{\times}VE$) was observed. Supplementation of Se improved the humoral immune response (p<0.008), whereas, VE showed a tendency towards improvement in cell mediated immune response (p<0.064). It was concluded that vitamin E and Se supplementation improved the status of these micronutrients and humoral immune response in buffalo calves.
The Journal of the Korean Society for Microbiology
/
v.13
no.1
/
pp.55-62
/
1978
Adult mice were injected with a single sublethal dose of cyclophosphamide. Effects of the drug on the body weight, spleen weight, and morphology of the peripheral lymphoid system have been analysed. The body weights of the mice given cyclophosphamide(300mg/kg body weight) decreased slightly and returned to normal quickly. Spleen weights, however, changed greatly by keeping the process of decrease, recovery, overshoot, and gradual return to normal only by 20 days. Histologic examinations of spleen and popliteal lymph node showed that follicles disappeared 1 to 2 days before periarteriolar lymphatic sheath or paracortex. At the peak of splenomegaly, the architectures of spleen and lymph node were replaced with the interstitial tissue composed of dense and uniform layer of lymphoid cells. With the return of spleen weight to normal range, the architecturles returned to normal. Our results clearly indicated that cyclophosphamide affected not only B cells but also T cells. These results seemed to suggest that augmentation of delayed-type hypersensitivity by cyclophosphamide may be due to the eliminateion of the suppressor T cells.
The in vivo and in vitro humoral and cell-mediated immune responses of lymphocytes of BALB/c mouse exposed to mercury chloride$(HgCl_2)$ were investigated. In vitro exposure of the splenocytes to mercury chloride produced overt cytotoxicity in 3 hours period. The $IC_{50}$(the concentration required to inhibit a splenocyte viability by 50%) for mercury chloride was >0.1mM for cytotoxicity. In vivo mercury chloride exposed mice were significantly depressed delayed type hypersensitivity(DTH) response to sheep red blood cells(SRBC) in a dose-dependent manner compared with control group. Mercury chloride inhibited the proliferative responses of splenocytes to lipopolysaccharide, pokeweed mitogen, concanavalin A and phytohemagglutinin in a dose-dependent manner. Hemagglutinin response to SRBC in mercury chloride exposed mice was significantly depressed in a dose-dependent manner compared with control group. After 7 weeks of mercury chloride exposure in vivo, mercury chloride induced an increase of nonspecific serum $IgG_1$ and IgE levels in BALB/c mice.
The Journal of the Korean Society for Microbiology
/
v.14
no.1
/
pp.89-97
/
1979
Nonspecific suppressions of the immune responses have been reported to occur in the cancer-bearing patients. The mechanisms responsible for these immunosuppressions remain unclear but some investigators suggested that the immunosuppressions may result from immunosuppressive factors exudated from tumor masses. This study was undertaken to evaluate the in vivo effects of ascitic and pleural fluids from patients with cancers metastatic to peritoneum or pleura on the immune responses of mice. Non-cancerous ascitic and pleural effusions were used as controls. The ascitic fluids from hepatomap atients and pleural fluids from pulmonary carcinoma patients decreased both the delayed-type hypersensitivity and the antibody formation only when these were injected before antigenic stimulation. Control effusions exerted no effect on the immune responses to mice. These results suggested that cancerous fluids suppressed the immune responses by affecting the afferent arc of the immune system.
The Journal of the Korean Society for Microbiology
/
v.14
no.1
/
pp.71-78
/
1979
This study was undertaken to elucidate the mechanism of the cyclophosphamide(CY)-induced potentiation of cell-mediated immune response by observing the effect of the phytohemaggllutinin(PHA) treatment before the CY administration into mice. Cy administration reduced the circulating white blood cells especially lymphocyte. PHA pretreatment before CY administration enhanced the depressing effect of CY administration on white blood cells. CY administration suppressed both the antibody formation to sheep red blood cells(SRBC) and rosette formation on the spleen cells with SRBC severely. On the other hand, CY administration potentiated the delayed-type hypersensitivity(DTH) strongly. Injection of PHA into mice slightly inhibited both the antibody formation and the DTH. PHA pretreatment before CY administration into mice suppressed not only humoral immune response but also cell-mediated immune response and the degrees of suppression were most remarkable when the PHA pretreatment was performed 5 days before CY administration. This depression of DTH caused by PHA pretreatment before CY administration may be the result that PHA stimulation make the helper cell sensitive to CY. The potentiation of cell-mediated immune response by CT may be due to the destruction of CY-sensitive suppressor T cell.
The Journal of the Korean Society for Microbiology
/
v.21
no.4
/
pp.423-434
/
1986
The role of macrophages in the resistance of ICR mice to Candida albicans and Salmonella typhimurium was assessed using silica, agent which selectively inactivates macrophages or poly-2-vinylpyridine-N-oxide(PVNO), a lysosomal stabilizing agent. In addition, effect of silica on humoral and cellular immune responses to sheep red blood cells(SRBC) or polyvinylpyroridone(PVP) was examind. Colonyforming units(CFU) of C. albicans or S. typhimurium in the spleen, livers and kidneys of silica-treated or diluent-treated mice were enumerated at various times after infection. Silica was given i. v. to mice at 4 days or 1 day before infection. Although there was no apparent differences in the number of CFU of C. albicans cultured from the spleens or livers of silica-treated and control mice at every assay period, significant differences in the number of CFU of C. albicans in the kidneys of silica-treated and control mice. Namely, silica given to mice 1 day before infection significantly increased the number of CFU of C. albicans in the kidneys at 2, 4 and 6 days after infection, but did not change the number of CFU at 8 days after infection. Silica given to mice at 4 days before infection significantly increased the number CFU in the kidneys at 2 and 4 days after infection, but rather decreased the number of CFU at 8 days after infection. The number of CFU of C. albians cultured from the kidneys of splenectomized which were experimentally infected mice was similar to the number recovered from sham-operated mice at 4 and 8 days postinfection irrespective of time of infection relative to operation. The pretreatment of mice with PVNO appeared to abrogate the silica-induced susceptibility of mice to C. albicans. PVNO alone showed somewhat protective effect against challenge with C. albicans. In contrast, silica treatment did not alter the number of CFU of S. typhimurium recovered from the spleens and kidneys of mice. The administration of silica to mice at 4 days or 1 day before SRBC immunization significantly suppressed delayed-type hypersensitivity(DTH) reactions to SRBC and antibody production to SRBC, a thymus-dependent antigen and PVP, a thymus-independent antigen. These results provide evidence that macrophages play an important role in susceptibility to Candida infection and strongly demonstrated that macrophages play an essential role in the induction of immune responses in mice.
In order to investigate experimentally the effects of Sung-yangikgibujat'ang (SIT) and Kwangyebujalijungt'ang (KBT) on Yang-insufficient syndrome (陽虛證) induced by Hydrocortisone acetate (H.A.) in experimental animals (Mice and Rat), the author experimented various activities. Delayed type hypersensitivity (DTH), Rosette forming cells (RFC), hemagglutinin (HA) titers, Hemolysin (HL) titers, Body weight, Whole blood viscosity, Plasma Viscosity, Hematocrit, RBC, Albumin, Total protein, Triglyceride, cholesterol and Glucose were measured. The results summerized as follows; 1. In DTH and RFC all the experimental groups were increased significantly in comparison to the H.A.-treated group. 2. In HA titers SIT_treated group were increased significantly and KBT-treated group showed increasing tendancy, but showed no significance. 3. In HL titers all the experimental groups showed increasing tendancy, but showed no significance. 4. In body weight all the experimental groups showed increasing tendancy, but showed no significance. 5. In whole blood viscosity all the experimental groups were decreased significantly in comparison to the H.A.-treated group. 5. In whole blood viscosity all the experimental groups were decreased significantly in comparison to the H.A.-treated group. 6. In plasma viscosity KBT-treated group were decreased significantly and SIT-treated group showed decreasing tendancy, but showed no significance. 7. In Hematocrit SIT-treated group were decreased significantly and KBT-treated group showed decreasing tendancy, but showed no significance. 8. In RBC, albumin and cholesterol all the experimental groups were decreased significantly in comparison to the H.A.-treated group. 9. In total protein and triglyceride KBT-treated group were decreased significantly and SIT-treated group showed decreasing tendancy, but showed no significance. 10. In Glucose SIT-treated group were decreased significantly and KBT-treated group showed decreasing tendancy, but showed no significance. From above findings, it has been demonstrated that Sungyangikgibujat'ang and Kwangyebujalijungt'ang seem to produce the effectiveness on the recovery from depression of the cell-mediated immune response, blood circulation and energy metabolic rate, induced by Hydrocortisone acetate, and in the humoral immune response Sungyangikgibujat'ang have the effectiveness on the recovery, and in cellular component of blood Sungyangikgibujat'ang was more effective than Kwangyebujalijungt' ang, and in plasma of blood Kwangyebujalijungt'ang was more effective than Sungyangikgibujat'ang. Therefore it is suggested that Sungyangikgibujat'ang and Kwangyebujalijungt'ang have the effectiveness on the recovery from Yang-insufficient syndrome more or less.
Park, Young-Min;Park, Yoon-Kyu;Ahn, Woo-Sup;Ha, Tai-You
The Journal of the Korean Society for Microbiology
/
v.22
no.2
/
pp.175-184
/
1987
The use of alkylating agent cyclophosphamide(CY), a widely used antitumor drug is well known as a potent immunosuppressant and has been used as a probe for investigating the functional capabilities of lymphocyte subsets of both T and B cells that play an important role in the regulation of the immune response. The present study was undertaken in an effort to assess the effects of CY on immunological memory in murine model. CY, given as a single dose of CY(250mg/kg) before sensitization with sheep red blood cells(SRBC) enhanced the primary response of Arthus and delayed-type hypersensitivity(DTH), as measured by footpad swelling reaction, but suppressed their tertiary DTH response. The similar CY pretreatment enhanced both the primary and tertiary hemagglutinin(HA) responses to SRBC, and the tertiary antibody response against polyvinylpyrroridone(PVP), a thymus-independent antigen but not the primary response against PVP. CY, given as a single dose of 250mg/kg 2 days before the primary immunization and two doses of 100mg/kg 2 days before the secondary and tertiary immunization, markedly suppressed the tertiary DTH and HA responses to SRBC. However, CY, given as small multiple daily doses(10mg/kg) over 4 days before sensitization but not after sensitization, enhanced the secondary HA response to SRBC. Contact sensitivity to dinitrofluorobenzene(DNFB) was suppressed by the drug, given either as a single large dose(300mg/kg) or as multiple dose(10mg/kg) administered 2 days before, together with or after DNFB sensitization. This suppression was more pronounced and more significant when CY was given as multiple dose. However, the enhancement of the secondary contact sensitivity to DNFB by CY was not clear-cut. The splenectomy appears to increase the enhancing effect of CY on contact sensitivity. These results suggest that CY selectively influences the immune response depending on the time of the drug administration relative to immunization and that the secondary or tertiary immune response involve memory cells with different susceptibilities to CY. Moreover, these results suggest that multiple low doses may sesectivley inhibit suppressor T cell proliferation involving DTH, HA or contact sensitivity without effecting helper T cells, but high doses presumably inhibit helper T cells and suppressor T cells with effecting B cells.
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