• Journal of Veterinary Science
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• 제24권3호
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• pp.38.1-38.12
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• 2023

Background: Poor disease management and irregular vector control could predispose sheltered animals to disease such as feline Bartonella infection, a vector-borne zoonotic disease primarily caused by Bartonella henselae. Objectives: This study investigated the status of Bartonella infection in cats from eight (n = 8) shelters by molecular and serological approaches, profiling the CD4:CD8 ratio and the risk factors associated with Bartonella infection in shelter cats. Methods: Bartonella deoxyribonucleic acid (DNA) was detected through polymerase chain reaction (PCR) targeting 16S-23S rRNA internal transcribed spacer gene, followed by DNA sequencing. Bartonella IgM and IgG antibody titre, CD4 and CD8 profiles were detected using indirect immunofluorescence assay and flow cytometric analysis, respectively. Results: B. henselae was detected through PCR and sequencing in 1.0% (1/101) oral swab and 2.0% (1/50) cat fleas, while another 3/50 cat fleas carried B. clarridgeiae. Only 18/101 cats were seronegative against B. henselae, whereas 30.7% (31/101) cats were positive for both IgM and IgG, 8% (18/101) cats had IgM, and 33.7% (34/101) cats had IgG antibody only. None of the eight shelters sampled had Bartonella antibody-free cats. Although abnormal CD4:CD8 ratio was observed in 48/83 seropositive cats, flea infestation was the only significant risk factor observed in this study. Conclusions: The present study provides the first comparison on the Bartonella spp. antigen, antibody status and CD4:CD8 ratio among shelter cats. The high B. henselae seropositivity among shelter cats presumably due to significant flea infestation triggers an alarm of whether the infection could go undetectable and its potential transmission to humans.

• Genomics & Informatics
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• 제21권2호
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• pp.18.1-18.11
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• 2023

Immunologists have activated T cells in vitro using various stimulation methods, including phorbol myristate acetate (PMA)/ionomycin and αCD3/αCD28 agonistic antibodies. PMA stimulates protein kinase C, activating nuclear factor-κB, and ionomycin increases intracellular calcium levels, resulting in activation of nuclear factor of activated T cell. In contrast, αCD3/αCD28 agonistic antibodies activate T cells through ZAP-70, which phosphorylates linker for activation of T cell and SH2-domain-containing leukocyte protein of 76 kD. However, despite the use of these two different in vitro T cell activation methods for decades, the differential effects of chemical-based and antibody-based activation of primary human T cells have not yet been comprehensively described. Using single-cell RNA sequencing (scRNA-seq) technologies to analyze gene expression unbiasedly at the single-cell level, we compared the transcriptomic profiles of the non-physiological and physiological activation methods on human peripheral blood mononuclear cell-derived T cells from four independent donors. Remarkable transcriptomic differences in the expression of cytokines and their respective receptors were identified. We also identified activated CD4 T cell subsets (CD55⁺) enriched specifically by PMA/ionomycin activation. We believe this activated human T cell transcriptome atlas derived from two different activation methods will enhance our understanding, highlight the optimal use of these two in vitro T cell activation assays, and be applied as a reference standard when analyzing activated specific disease-originated T cells through scRNA-seq.

• IMMUNE NETWORK
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• 제3권1호
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• pp.8-15
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• 2003

Background: CD30 is a member of TNF receptor family and expressed on lymphocytes and other hematopoietic cells following activation as well as Hodgkin and Reed-Sternberg cells in Hodgkin's lymphoma. In this study, CD30-mediated regulation of cell adhesion molecule expression on normal activated mouse T cells was investigated. Methods: Mouse T cells were activated with anti-CD3 antibody for induction of CD30, which was cross-linked by immobilized anti-CD30 antibody. Results: High level of CD30 expression on T cells was observed on day 5, but only little on day 3 even under culture condition resulting in an identical T cell proliferation, indicating that CD30 expression requires a prolonged stimulation up to 5 days. Cross-linking of CD30 alone altered neither proliferation nor apoptosis of normal activated T cells. Instead, CD30 appeared to promote cell adherence to culture substrate, and considerably upregulated ICAM-1 and, to a lesser extent, ICAM-2 expression on activated T cells, whereas CD2 and CD18 (LFA-1) expression was not affected. None of cytokines known as main regulators of ICAM-1 expression on tissue cells (IL 4, $IFN{\gamma}$ and $IFN{\alpha}$) enhanced ICAM-1 expression in the absence of CD30 signals. On the other hand, addition of $NF-{\kappa}B$ inhibitor, PDTC (0.1 mM) completely abrogated the CD30-mediated upregulation of ICAM-1 expression, but not CD2 and ICAM-2 expression. Conclusion: This results support that CD30 upregulates ICAM-1 expression of T cell and such regulation is not mediated by higher cytokine production but $NF-{\kappa}B$ activation. Therefore, CD30 may play important roles in T-T or T-B cell interaction through regulation of ICAM-1, and -2 expression.

• Toxicological Research
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• 제17권2호
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• pp.115-121
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• 2001

Some of endocrine disruptors with sexual hormone-like effects have been increasingly reported to be immunotoxic in many species in recent several years. Phthalate esters have possible effects on the endocrine system. Prenatal exposure to di(n-butyl) phthalate (DBP) has been reported to impair the androgen-dependent development of the male reproductive tract in rat. Therefore, the immunomodulatory effect of DBP was investigated in the developing immune system of fetal and neonatal Sprague-Dawley rats. Timed-bred pregnant SD rats were given to the doses of 0, 250, 500, and 750 mg DBP/kg$\cdot$ body weight /day by gavage once a day from gestational day (GD) 5 to 18. On GD19 or GD22/postnatal day one (PD1), the dams were euthanized, and the changes in organ weights and thymus phenotypes were examined for their offsprings. At 750 mg DBP/kg$\cdot$b.w./day in maternal exposure group, GD19 fetuses showed decreases in body weight. The spleen/body weight ratios were reduced in GD 19 fetuses from the dams exposed to 500 and 750 mg DBP/kg$\cdot$b.w./day. There were no significant changes in thymus and spleen cellularities though these cellularities showed a tendency to decrease in a dose dependent way. In the DBP-exsposed GD22/PD1 offsprings, the body weights, the relative organ weights and the cellularities did not exhibit alteration. Additionally, the percentages of CD3$^{+}$(CD4$^{+}$CD8$^{+}$, CD4$^{+}$CD8$^{-}$, CD4$^{-}$CD8$^{+}$, and CD4$^{-}$CD8$^{-}$) and CD3$^{-}$(CD4$^{+}$CD8$^{+}$, CD4$^{+}$CD8$^{-}$, CD4$^{-}$CD8$^{+}$, and CD4$^{-}$CD8$^{-}$) thymocyte subsets were not changed in any DBP-treated group. The proliferative responses of splenic T cells to Con A and B cells to LPS were decreased in all DBP-exposed GD22/PD1 offsprings.

• 대한두개안면성형외과학회지
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• 제18권2호
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• pp.122-127
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• 2017

Castleman's disease (CD) is an uncommon benign lymphoproliferative disorder of unknown etiology. Histopathologically, it is divided into three types: hyaline-vascular, plasma cellular, and multicentric CD. The mass usually presents asymptomatically; however, it can cause non-specific symptoms such as fever and fatigue. Although CD can be found wherever lymph nodes are present, 75% of cases are reported in the mediastinum, and occurrence in the head and neck is rare. Herein, we report a rare case of CD presenting as a superficial mass in the temporal region. To the best of our knowledge, this is the first report of temporal CD in Korea involving a young patient.

• 분석과학
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• 제12권5호
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• pp.360-369
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• 1999

본 연구에서는 각종 수중 중금속을 제거할 목적으로 구멍갈파래와 톳에 대한 중금속이온의 흡착속도에 관한 연구를 수행하였다. 실험결과 구멍갈파래와 톳에 대한 Cd(II) 및 Pb(II) 이온의 흡착속도는 5분이내로 최대흡착량에 도달하였으며 구멍갈파래에 대한 흡착량이 더 많았다. 구멍갈파래에 대한 흡착율은 pH에 따라 Cd(II) 이온이 15.0~100%, Pb(II) 이온이 39.2~82.5%로 나타났다. 톳은 Cd(II) 이온이 18.3~100%, Pb(II) 이온이 56.4~94.7%로 나타났다. 한편 구멍갈파래에 대한 회수율은 pH에 따라 Cd(II) 이온이 75.0~83.6%, Pb(II) 이온이 79.1~85.5%로 나타났으며, 톳은 Cd(II) 이온이 66.7~85.0%, Pb(II) 이온이 77.6~83.9로 나타났다. 구멍갈파래에 대한 Cd(II) 및 Pb(II) 이온의 흡착량이 톳보다 더 많았다.

• 한국임상수의학회지
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• 제21권3호
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• pp.229-235
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• 2004

본 연구에서는 최근 국내에서 발병하는 개 디스템퍼(CD)의 역학적 조사를 위하여 2002년 2월부터 2002년 10월까지 강원도, 경기도와 서울특별시의 10개 동물병원 수의사에 의하여 CD에 감염된 것으로 잠정진단된 315마리의 개를 대상으로 하였다. 개체의 신상자료와 임상증상을 조사하였으며 CD를 확진하기 위하여 혈액의 단핵구나 결막 상피세포에서 CDV의 NP gene을 RT-PCR로 증폭하였다. CD로 의심되는 총 315마리 중 162마리가 CD 양성으로 진단 되었으며 성별과 종에 따른 발병율에는 차이가 없었다. 나이별 분포는 백신을 접종해야 하는 기간인 6-18주에 가장 높은 분포를 보였으며 1세 이상에서도 소수 발병하였다. CD환축은 호흡기 증상, 위장관 증상, 눈의 증상 등 다양한 증상이 나타나 임상증상에 근거하여 CD를 진단하기에 어려움이 있었다. CD 양성의 개 중 84.6%가 백신을 한번도 맞지 않았거나 예방접종을 제대로 실시되지 않은 상태였으며 CDV에 대한 혈청 중화 항체가는 96.9%의 개가 방어수준 이하인 1:16 이하를 나타내었다. CD 양성 162 마리와 CD음성으로 진단 된 153마리의 혈청 중화 항체가 사이에는 통계적인 유의차가 인정되었으며 (P<0.05), CD 양성 개 중에 생존 한 개들은 폐사한 개들보다 중화 항체가 높은 경향을 보였다. 눈의 증상과 신경증상을 보인 개체들은 다른 개체들에 비해 생존율이 유의하게 낮은 것으로 나타났다 (P<0.05). 본 연구의 결과 현재 국내에서 발병하고 있는 개 디스템퍼는 예방접종의 실패에 따라 개들의 항체 수준이 전반적으로 낮은 것에 기인하는 것으로 판단되므로 예방접종에 대한 전반적인 검토가 필요하며 예방을 위하여 감염에 취약한 시기에는 감염원에 접촉을 최소화하는 것이 중요할 것으로 판단되었다.

• Asian-Australasian Journal of Animal Sciences
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• 제18권12호
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• pp.1794-1799
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• 2005

The present study was carried out to develop crosslinking of $\beta$-cyclodextrin ($\beta$-CD) using adipic acid, and to determine the optimum conditions of different factors ($\beta$-CD concentration, mixing temperature, mixing time and mixing speed) on cholesterol reduction from homogenized milk. Crosslinked $\beta$-CD was prepared with adipic acid. When the milk was treated with different conditions, the cholesterol removal rate was in the range of 92.1 to 93.1% with 1% $\beta$-CD addition, which were not significantly different among treatments. After cholesterol removal from milk, the used crosslinked $\beta$-CD was washed for cholesterol dissociation and reused. For recycling study, the cholesterol removal rate in the first trial was 92.5%, which was mostly same as that using new crosslinked $\beta$-CD. With repeated ten time trials using same sample, 81.4% of cholesterol was removed from milk. Therefore, the present study indicated that the optimum conditions for cholesterol removal using crosslinked $\beta$-CD were 1% $\beta$-CD addition and 10 min mixing with 400 rpm speed at 5$^{\circ}C$ with over 90% cholesterol removal. In addition, crosslinked $\beta$-CD made by adipic acid resulted in the effective recycling efficiency.

• Clinical and Experimental Pediatrics
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• 제51권12호
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• pp.1336-1341
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• 2008

목 적: 본 연구의 목적은 사람의 동종 조혈모세포이식에서 공여자의 이식편과 환자의 이식 후 말초혈액에서 $CD4^+CD25^+$ T 세포 분획의 분포를 알아보고 급성 이식편대숙주병(GVHD)과 연관성을 알아보고자 하였다. 방 법: 동종 조혈모세포이식을 시행 받은 17명의 소아를 대상으로 하였다. 공여자의 이식편과 이식 받은 환자의 이식 후 말초혈액으로부터 얻은 검체를 유세포 분석(flow cytometry)하였다. 공여자의 이식편과 이식 후 1개월과 3개월에 환자의 말초혈액 내 $CD4^+CD25^+$ T 세포의 분획과 절대 세포수를 알아보았다. 결 과: 공여자의 이식편 내 $CD4^+CD25^+$ T 세포의 분획은 급성 GVHD 발생군과 비발생군에서 각각 0.90%, 1.06%이었으며 차이가 없었다(P=0.62). 이식편 내 $CD4^+CD25^+$ T세포의 절대수는 급성 GVHD 발생군과 비발생군이 각각 $6.18{\times}10^5/kg$와 $25.85{\times}10^5/kg$으로 급성 GVHD 비발생군이 발생군보다 많은 경향을 보였으나 유의성은 없었다(P=0.09). 급성 GVHD 비발생군의 말초혈액 $CD4^+CD25^+$ T 세포는 이식 후 1개월에 2.11%, 3개월에 1.43%로 유의하게 감소하였으나(P=0.028), 급성 GVHD 발생군의 말초혈액 내 $CD4^+CD25^+$ T 세포는 이식 후 1개월과 3개월에 각각 2.47%와 2.30%로 유의한 차이가 없었다(P=0.50). 결 론: 본 실험을 통하여 저자들은 공여자의 이식편 내 $CD4^+CD25^+$ T세포의 분포와 이식 후 환자의 급성 GVHD의 관계에 대한 유의성은 검증할 수 없었으며 이식 후 환자의 말초혈액 내 $CD4^+CD25^+$ T 세포에는 조절 T세포보다 GVHD와 연관된 활성화된 T세포의 분획이 더 클 것으로 사료되나 추가적인 조절 T세포의 표지자를 이용한 검증이 필요할 것으로 사료된다.

• 환경생물
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• 제18권1호
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• pp.63-67
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• 2000

$Cd^2+$이 닭의장풀의 엽록소 함유량, 기공 크기, 수분퍼텐셜, 이온 수송에 대한 효과와 기관내의 카드뮴의 축적에 대하여 조사하였다. 3주간 성장한 닭의장풀을 Hoagland용액(${\pm}5mM Cd^2+$)에서 4일 동안 수경배양하였다. 카드뮴은 식물의 뿌리, 줄기 그리고 잎 등 모든 기관에 축적되었다. 뿌리로부터의 거리와 잎의 나이 등이 카드뮴 분포를 결정짓는 가장 중요한 요소였다. 대부분의 $Cd^2+$이 뿌리로부터 가장 인접한 성숙한 첫 번째 잎에 축적되었다. 잎에 $Cd^2+$의 축적은 여러 생리적인 대사의 활성에 감소를 가져왔다. 카드뮴 처리는 70%의 엽록소 함량 감소를 가져왔으며, 엽록소 a/b비도 2로 감소하였다. $Cd^2+$은 또한 20%의 수분퍼텐셜을 감소시켰다. 카드뮴 처리는 여러 광도(100-l,000$\mu$mol $Em^-2s^-1$)에서 광합성 활성을 약 60% 감소시켰으며 기공전도도도 비슷한 반응을 보였다. 따라서, $Cd^2+$이 닭의장풀의 전반적인 생리적 활성을 감소시키거나 차단하는 것으로 추측된다.