• Proceedings of the Korean Society of Veterinary Pathology Conference
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• 2002.11a
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• pp.150-150
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• 2002

40두 규모의 농장에서 사육된 홀스타인 종, 4개월령의 수컷 송아지에서 거세 후 고열, 식욕부진, 기침 등의 증상과 함께 전신 체표 림프절의 종대가 관찰되어 백혈병으로 잠정진단 하고 도태를 권유하였으나 축주가 치료를 원해 항생제와 해열제 및 기타 대증요법을 실시한 후 치료반응이 없어 폐사하여 부검을 실시하였다. 혈액 검사상 이상핵과 다형핵을 가진 다수의 림프구 및 백혈구, 호중구, 림프구 및 단핵구의 증가가 관찰되었다. 또한 백혈병 바이러스에 대한 분리 및 PCR 검사는 음성이었다. 부검 소견으로 체표 림프절, 슬관절 부위 및 비장과 간의 종대가 관찰되었으며 비장 중심에 12x11 cm의 종괴와 폐의 전엽부 유착 및 폐문, 종격동 림프절의 심한 종대가 관찰되었다. 견갑전 림프절을 비롯하여 대퇴골 전, 서혜, 폐문, 이하림프절 등 전신 림프절의 종대 및 소성의 연한 황색의 매끄러운 절단면을 보였다. 전지 관절의 종대와 관절강 내부는 증가된 농성 활액을 보였으며 고관절 강 내에 농성 활액의 증가와 공기 노출 후 젤리양 응고를 보였다. 심장은 장액성 위축과 함께 섬외막성 점상출혈이 나타났다. 병리조직학적 소견으로 비장은 지주 주변에 미성숙형의 세포들의 침윤이 보이며 유사분열상이 다수 관찰되었고 백색 수질에도 유사분열상의 증가와 함께 림프아구성 세포들이 다수 나타났다. 이들 주요한 비정상 세포들은 다형성의 큰 핵을 가진 다양한 림프아구의 형태를 지녔으며 핵내 공포가 인정되었다. 비장의 종괴 주변에는 증식된 섬유조직으로 둘러싸여 있었으며 미세농양 형성되어 있고, 일부 석회화가 진행된 부위도 있었다. 간소엽성 중심성 울혈과 가벼운 간세포내 지방침윤, 혈관 내 림프아구 형태의 세포와 소수의 호중구가 관찰되었다. 간삼조 주변에는 가볍거나 중등도의 단핵세포의 침윤이 미만성으로 관찰되었다. 폐에서는 중등도의 기관지 폐렴과 함께 일부는 무기폐가 관찰되었으며 폐포강과 세기관지내에는 염증성 삼출물이 다량 들어 있었다. 다병소성 미세농양과 함께 괴사가 있었고 실질의 섬유화가 진행되어 있었다. 또한 중등도의 간질성 신장염과 림프절은 지주 주변에 간극 내 비정상 림프구 세포의 형태는 비장의 그것과 유사하였으며 적수와 백수의 구이 힘들며 림프소절이 증가되어 있었다. 한 시야에서 유사분열상이 6-8 개로 그 지수가 매우 높으며 이와 더불어 큰 림프구가 전반에 걸쳐 침윤되어 있었다. 주변부 동(sinus)에는 많은 물질들이 침윤되어 있으며 렴프소절내 미만성의 성상현상이 관찰되었다. 회장은 파이어판내 심한 림프구 소실이 나타났다. 이상의 소견을 바탕으로 본 증례는 산재성 송아지 백혈병으로 진단되었다

• Parasites, Hosts and Diseases
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• v.30 no.1
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• pp.43-48
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• 1992

Paragonimus westermani is a common fluke in Uorea. The present study aimed to observe the cell mediated immune response in experimental paragonimiasis of mice. The mouse (BALB/c) was orally inoculated with 40 metacercariae of P. westermani from Cambaroides similis. During the infection (1, 2, 4, 6 weeks) of mouse, blastogenic response of splenic Iymphocytes to P. westermani adult antigen, metacercaria antigen, and PHA were observed. Sera from infected and noninfected mice added to normal mouse splenic Lymphocytes with or without PHA. The blastogenic response of splenic Lymphocytes to PHA was reduced after 1 week of infection. However after 6 weeks of infection, the response was restored to the control level. The blastogenic response of splenic Iymphocytes to P. westermani adult or metacercaria antigen increased significantly on 1 week after infection, and maintained up to 6 weeks after infection. The response of non-infected mice was suppressed by addition of the infected mouse serum. The present results suggested that cellular immunity was involved in P. westermani infected mice and that P. westermani anti.serum inhibited proliferation of T Iymphocytes.

• Parasites, Hosts and Diseases
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• v.35 no.2
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• pp.79-86
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• 1997

Toxoplasmn gonnii, an intracellular protozoan infecting many kinds of eukaryotic cells, has been used to experimentally infect macrophages, epithelial cells, fibroblasts, and various cancer cells, but rarely T and B Iymphocytes or granulocytes. The present study was performed to determine the susceptibility of murine (BALB/c or CBA) splenic T and B llrnphocytes, and granulocytes to infection trio T. gondii RH tachyzoites. The ultrastructure of the infected host cells was observed by TEM, and the degree of intracellular parasite proliferation was quantified using 3H-uracil uptake assay. At 24 hrs post-culture, the host cell cytoplasm was found to contain 1 or 2, or a maximum of 7-8 tachyzoites. Infected T Iymphocytes demonstrated a peripherally displaced nucleus, a parasitophorous vacuole enveloping the parasite, and an increased number of mitochondria. In B Iymphocytes infected with tachyzoites, RER was not well developed compared to uninfected B Iymphocytes. Uninfected granulocytes contained many electron dense granules, but T. gondii-infected granulocytes demonstrated a decreased number of granules. Based on the 3H-uracil uptake assay. the susceptibility of T and B Iymphocytes, and granulocytes, to infection with T. gonnii tachyzoites was fairly high irrespective of cell type and strain of mouse. This strongly suggests deterioration in the functioning of infected host immune cells.

• Korean Journal of Poultry Science
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• v.34 no.1
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• pp.31-36
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• 2007

This experiment was conducted to determine the effect of betaine on immune response in laying hens. A total of 72 ISA-brown laying hens were divided into four groups of 18 hens each and fed corn-soybean meal based diets with addition of 0, 300, 600 and 1,200 ppm betaine for four weeks. The effect of betaine on splenocyte proliferations with mitogens, concanavalin A(Con A) and pokeweed mitogen(PWM), were assayed after incubation using [3H] thymidine uptake. Proliferations of splenocyte were significantly increased by activation of mitogen Con A or PWM. Mitogen effects of Con A were increased by Con A plus betaine injection(0.1 mM), whereas PWM effects did not affect in PWM plus betaine injection(0.1 mM) in vitro. Splenocyte of laying hens fed betaine tended to proliferate in the presence of PWM, but appeared to be slightly suppressed in the presence of Con A in vivo. Proliferation of splenocytes which were stimulated by Con A or Con A+betaine injection(0.1 mM) were increased in dietary 600 ppm betaine, but inhibited in dietary 1,200 ppm betaine supplementation. Spleen weights and sheep red blood cell(SRBC) titers of hens fed betaine tended to increase compared to those of control, but were not significantly different. These results suggested that betaine could increase splenocyte proliferation in vitro.

• Korean Journal of Veterinary Research
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• v.34 no.1
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• pp.19-24
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• 1994

비유중기, 건유초기 및 임신말기의 C3H/HeN 마우스의 비장, 장간막림프절, 말초림프절(액와, 상완 및 샅림프절)유래 림프구에서 생산되는 lymphokine의 양을 비교하였다. 비장에서의 IL-2 생산양은 임신말기와 비유중기에 낮았지만, IL-4, IL-6와 $IFN_{\gamma}$의 생산양은 임신말기와 건유초기에 높았다. 말초림프절에서의 IL-4, IL-6 및 $IFN_{\gamma}$ 생산양은 임신말기와 건유초기에 높았지만, IL-2의 생산양은 임신말기, 비유중기 및 건유초기에 각각 감소하였다. 장간막림프절에서의 IL-4 생산양은 임신말기와 비유중기에 각각 증가하였으나, IL-2의 생산양은 임신말기에 감소하였다. 이와같이 전반적으로 건유초기와 임신말기에 IL-2의 생산양은 낮지만, IL-4, IL-6와 $IFN_{\gamma}$의 생산양이 높은 결과는 이 시기에 유방염의 발생비율이 높은 것과 연관성이 있는 것으로 추정된다.

• Parasites, Hosts and Diseases
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• v.31 no.3
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• pp.231-238
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• 1993

Effects of Paragonims westermai infection were observed in mice on the change of serum IgE level, the number of peripheral eosinophils and the distribution of Thy $1.2^{+}{\;}(CD3),{\;}L3T4^{+}{\;}(CD4),{\;}and{\;}Lyt-2^{+}$ (CD8) splenic T Iymphocytes without mitogen serum IgE increased at 3 weeks after the infection and reached a peak on week 4 and maintained high levels of IgE until the 23r6 week. Peripheral eosinophil numbers Increased at the second week and attained peak level on week 9. The frequency of $L3T4^{+}$(CD4) and $Lyt-2^{+}$ (CD8) T Iymphocytes decreased slightly until 4 weeks after the infection, but not significantly. Absolute number of $L3T4^{+}{\;}and{\;}Lyt-2^{+}$ T Iymphocytes, and the ratio of L3T4/Lyt-2 were not markedly changed over the period of observation. The frequency of Thy $1.2^{+}$ (CD3) T lymphocytes in the infected group slightly decreased until 4 weeks after the infection and showed significant reductions at the 2nd and 4th week of the infection (p < 0.05).

• Journal of Radiation Protection and Research
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• v.22 no.3
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• pp.153-160
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• 1997

The frequencies of ${\gamma}$-ray-induced micronuclei (MN) in cytokinesis-blocked (CB) lymphocytes at several doses were measured in three donors of human and C57BL/6 mice. Measurements performed after irradiation showed a dose-related increases in MN frequency in each of the donors studied. The relative sensitivity of mouse in spleen lymphocytes (SLs) compared with human peripheral blood lymphocytes (PBLs) was estimated by best fitting linear-quadratic model based on the radiation-induced MN data over the range from 0 cGy to 400 cGy. In the case of MN frequency with 0.2 per CB cell, the relative sensitivity of mouse SLs was 1.67. Compared with the radiation-induced MN formation in the PBLs of human, the SLs of mouse were more radiosensitive. Using this MN assay with human PBLs and mouse SLs, studies were performed to determine whether the water fraction of ginseng (Panax ginseng C.A.Meyer) against radiation-induced MN in human PBLs after in vitro irradiation (3Gy) and in SLs of C57BL/6 mice after in vivo irradiation (3Gy). The frequency of MN in human PBLs was reduced by water fraction of ginseng (0.5mg/ml of medium) both pre-and post treatment (p<0.0l) in vitro. In addition, the frequency of MN in mouse SLs was also reduced by pretreatment of ginseng (2mg/ml of drinking water for 7days) in vivo. The data suggested that the ginseng may reduce cell damage caused by ${\gamma}$-rays in vitro and in vivo. Further studies are needed to characterize better the protective nature of ginseng extract, its fractions and compounds.

• Korean Journal of Food Science and Technology
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• v.34 no.3
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• pp.510-517
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• 2002

Effects of wheat arabinoxylan on mouse spleen lymphocytes and peritoneal macrophages were examined in vitro. Among three wheat arabinoxylans (A1: low MW, A2: medium MW, A3: high MW), A3$(50{\sim}100\;{\mu}g/mL)$ increased the viability of spleen lymphocytes up to $114{\sim}125%$ of the control. A1 and A3 $(20\;{\mu}g/mL)$ increased the viability of lipopolysaccharide-treated lymphocytes synergistically. Viability of murine peritoneal macrophages treated with wheat arabinoxylans $(10{\sim}100{\mu}g/mL)$ was increased up to $135{\sim}175%$ of the control. The cytotoxic activity of macrophages against murine lymphocytic leukemic cell increased in the presence of wheat arabinoxylan. Phagocytic index of macrophages treated with wheat arabinozylans $(20\;{\mu}g/mL)$ significantly increased $197{\sim}232%$ compared with the control, and lysosomal phosphatase and myeloperoxidase activities also increased significantly (p<0.05). Treatment of wheat arabinoxylans tended to decrease nitrite production, but significantly stimulated $H_2O_2\;and\;O_2$ productions of macrophages (p<0.05). These results indicate that the immunostimulating effect of wheat arabinoxylan may be closely related with lysosomal enzyme activity and reactive oxygen intermediate production of macrophages.

• Korean Journal of Food Science and Technology
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• v.54 no.2
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• pp.155-162
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• 2022

This study investigated the immunostimulatory effect of enzymatic porcine placental hydrolyzate (EPPH) in cyclophosphamide (Cy)-treated rats. This effect of EPPH prevented Cy-induced decreases in body, spleen, and thymus weights and natural killer (NK) cell activity. The numbers of immune cells, such as white blood cells, granulocytes, and lymphocytes, and mid-range absolute counts were significantly higher compared to the control group. The levels of tumor necrosis factor-alpha (TNF-α), interleukin (IL)-1β, IL-2, IL-12, and immunoglobulin G (IgG) were notably reduced by Cy, while EPPH prevented these effects. Histopathological analysis of spleen samples revealed the protective effect of EPPH against Cy-induced immunosuppression. The findings demonstrate that EPPH can alleviate immunosuppression by cell viability, tissue damage, and regulation of the levels of cytokines. EPPH may have value as a component of immunostimulatory agents or an ingredient in functional foods.

• Korean Journal of Food Science and Technology
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• v.42 no.3
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• pp.350-354
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• 2010

Laminaria japonica polysaccharides (LP) were prepared from L. japonica through hot water extraction, ultrafiltration and gel chromatography. In this study, we investigated the immunomodulating activity of LP (0.25-1 mg/mL) on the mitogen/alloantigen reactive proliferation and killing activity of the Balb/c mouse splenocytes. The LP directly induced the proliferation of splenocytes that was stimulated with mitogen or alloantigen in a dose-dependent manner. The killing activity of cytotoxic T lymphocytes (CTLs) and lymphokine activated killer cells (LAKs) were enhanced significantly in the LP treated cells. Also, the treatment of splenocytes with LP increased production of interleukin-2 (IL-2). These results suggest that polysaccharides from L. japonica show a substantial immunomodulating activity in mouse immune cells.