• 제목/요약/키워드: CD4+ T

검색결과 1,087건 처리시간 0.027초

Etiologic and Immunologic Characteristics of Thoroughbred Horses with Bacterial Infectious Upper Respiratory Disease at the Seoul Race Park

  • Ryu, Seung-Ho;Koo, Hye-Cheong;Park, Young-Kyung;Kim, Jun-Man;Jung, Woo-Kyung;Davis, William C.;Park, Yong-Ho;Lee, Chang-Woo
    • Journal of Microbiology and Biotechnology
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    • 제19권9호
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    • pp.1041-1050
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    • 2009
  • Equine respiratory disease is a common cause of poor performance and training interruptions. The higher incidence rate of infectious upper respiratory disease (IURD) in thoroughbred racehorses at the Seoul Race Park coincided with the frequent stabling season, shorter stabling periods, and younger ages in this study. Incidence rates were also correlated with significantly lower proportions of cells expressing MHC class II-, CD2 antigen-, $CD4^+$- or $CD8^+$-T lymphocyte-, and B lymphocyte in IURD patients compared with healthy control groups in the summer and fall and in 2-and-3-year-old groups. The data suggested that movement and new environments may have resulted in immunosuppression and inappropriate responses to respiratory pathogens in IURD patients. The IURD incidence decreased with age, perhaps by the acquisition of immunity, and study results suggested that immunologic protection was associated with IURD, particularly in young thoroughbred racehorses. Streptococci isolates were identified in 11 of 72 IURD horses, and 3 of these isolates were identified as Streptococcus. equi subsp. equi. S. equi subsp. zooepidemicus was isolated from 2 of 23 IURD horses in the spring (8.7%), 5 of 23 in the summer (21.7%), and 1 of 6 in winter (16.7%). S. equi subsp. zooepidemicus (5%) was also identified in 3 of 61 isolates from clinically normal horses. Racetracks should implement anti-IURD protective measures by assessing the capacity of equine immunologic protection at the Park and by limiting the introduction of specific respiratory pathogens (such as S. equi subsp. equi) by preventing the access of infected but subclinical horses with a specified respiratory pathogen-free certification system prior to Park entry.

B7-H4 Expression is Associated with Cancer Progression and Predicts Patient Survival in Human Thyroid Cancer

  • Zhu, Jian;Chu, Bing-Feng;Yang, Yi-Peng;Zhang, Sheng-Lai;Zhuang, Ming;Lu, Wen-Jie;Liu, Ying-Bin
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권5호
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    • pp.3011-3015
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    • 2013
  • Objective: This study aimed to investigate the expression of B7-H4 in human thyroid cancer and determine any association with patient clinicopathological parameters and survival. Methods: B7-H4 expression in 64 clinical thyroid cancer specimens was assessed with immunohistochemistry. Moreover, B7-H4 mRNA expression in 10 fresh resected specimens were evaluated by the reverse transcription-polymerase chain reaction (RT-PCR). Immunohistochemical staining of CD3 was performed to assess the number of tumor infiltrating T lymphocytes (TILs) in thyroid cancers. Results: Positive B7-H4 immunohistochemical staining was observed in 61 out of 64 (95.3%) specimens of thyroid cancer tissues. Significantly more B7-H4 mRNA copies were found in thyroid cancer tissue than that adjacent normal tissue. Moreover, B7-H4 expression in human thyroid cancer tissues was significantly correlated with patient TNM stages and extrathyroidal extension (P<0.05), being inversely correlated with the number of TILs (P<0.05). The overall survival rate of the patients with higher B7-H4 expression was significantly worse than that of the patients with lower B7-H4 expression. Conclusions: This present study suggests that high B7-H4 expression is associated with cancer progression, reduced tumor immunosurveillance and worse patient outcomes in human thyroid cancer.

황색육아종과 동반된 면역글로불린G4관련안질환 1예 (IgG4-related Ophthalmic Disease Associated with Adult Xanthogranulomatous Disease)

  • 이승현;정석중;허진형;유혜린
    • 대한안과학회지
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    • 제59권11호
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    • pp.1071-1076
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    • 2018
  • 목적: 기존 안와 황색육아종이 진단되었던 환자에서 재발된 피부 황색육아종을 통하여 면역글로불린G4관련안질환이 동반 진단된 증례를 보고하고자 한다. 증례요약: 양안의 눈꺼풀 부종을 주소로 38세 남성이 내원하였다. 전안부 및 후극부에서 특이 소견이 관찰되지 않았다. 조직검사상 포말조직구 및 토우튼 거대세포가 관찰되며 S100 및 CD1 염색에 음성 소견을 보여 성인황색육아종 진단하 경구 아자씨오프린과 프레드리솔론 치료를 받았다. 4년 뒤 양안의 노란색 눈꺼풀 종괴를 주소로 재내원하였다. 자기공명영상에서 양안 안와 상외측의 대칭적인 연부조직 부종이 관찰되었고, 혈액검사상 immunoglobulin G (IgG) 및 IgG4 수치가 상승되었다. 조직검사 후 면역화학염색에서 IgG4+/IgG+ 10-20%, IgG4+ 22/고배율시야가 확인되었으며 과거 조직을 재염색하여 IgG4+/IgG+ 40-50%, IgG4+ 59/고배율시야를 확인하여 전형적인 면역글로불린G4관련안질환으로 새롭게 진단하였다. 결론: 비특이적인 눈꺼풀 부종환자에서 면역글로불린G4관련안질환을 고려해야 하며, 기존 황색육아종 환자에서도 면역글로불린G4관련안질환이 동반될 수 있다.

승기천 유역의 오염물 유출특성 및 수질관리방안 연구 (A Study on the Runoff Characteristics and Water Quality Management of Seung-Gi Stream Area)

  • 서형준;정상원;박미옥;이병렬
    • 청정기술
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    • 제7권4호
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    • pp.251-263
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    • 2001
  • 본 연구는 인천광역시의 주요 하천인 승기천의 현재 오염현황과 특성, 오염원을 분석하고 승기천 회복방안 마련을 위한 기초자료를 얻기 위해 수행되었다. 승기천을 5 구간으로 나누어 10 회에 걸친 시료채취를 하였으며, 유량, pH, DO, SS, $BOD_5$, $COD_{Cr}$, T-P, TKN 등과 Zn, Cd, Cu, Cr 원소의 농도를 측정하여 강우와 무강우시 승기천으로 유입되는 각 구간별 오염부하특성, 연간 오염부하량을 선정하였다. 남동공단이 밀접해 있는 하류구간으로 갈수록 구간별 유입부하가 매우 컸으며 전 구간에 걸쳐 하천 수질 환경기준을 크게 상회함을 알 수 있었고, 인천연안 오염에 큰 영향을 끼칠 것이 우려되었다. 이를 해결하기 위한 방안으로 승기 하수처리장 처리수, 승기 하수처리장 처리수의 URC(ultra rapid coagulation) 재처리수의 순환과 승기천으로 직접 유입되는 하폐수를 차집 처리하는 것을 가정하여 수질을 예측해 봄으로써 승기천의 하천으로서의 역할 회복 방안을 모색해 보았다.

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Walnut phenolic extracts reduce telomere length and telomerase activity in a colon cancer stem cell model

  • Shin, Phil-Kyung;Zoh, Yoonchae;Choi, Jina;Kim, Myung-Sunny;Kim, Yuri;Choi, Sang-Woon
    • Nutrition Research and Practice
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    • 제13권1호
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    • pp.58-63
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    • 2019
  • BACKGROUND/OBJECTIVES: Telomeres are located at the chromosomal ends and progressively shortened during each cell cycle. Telomerase, which is regulated by hTERT and c-MYC, maintains telomeric DNA sequences. Especially, telomerase is active in cancer and stem cells to maintain telomere length for replicative immortality. Recently we reported that walnut phenolic extract (WPE) can reduce cell viability in a colon cancer stem cell (CSC) model. We, therefore, investigated the effect of WPE on telomere maintenance in the same model. MATERIALS AND METHODS: $CD133^+CD44^+$ cells from HCT116, a human colon cancer cell line, were sorted by Fluorescence-activated cell sorting (FACS) and treated with WPE at the concentrations of 0, 10, 20, and $40{\mu}g/mL$ for 6 days. Telomere lengths were assessed by quantitative real-time PCR (qRT-PCR) using telomere specific primers and DNA extracted from the cells, which was further adjusted with single-copy gene and reference DNA ($ddC_t$). Telomerase activity was also measured by qRT-PCR after incubating the PCR mixture with cell protein extracts, which was adjusted with reference DNA ($dC_t$). Transcriptions of hTERT and c-MYC were determined using conventional RT-PCR. RESULTS: Telomere length of WPE-treated cells was significantly decreased in a dose-dependent manner ($5.16{\pm}0.13$ at $0{\mu}g/mL$, $4.79{\pm}0.12$ at $10{\mu}g/mL$, $3.24{\pm}0.08$ at $20{\mu}g/mL$ and $3.99{\pm}0.09$ at $40{\mu}g/mL$; P = 0.0276). Telomerase activities concurrently decreased with telomere length ($1.47{\pm}0.04$, $1.09{\pm}0.01$, $0.76{\pm}0.08$, and $0.88{\pm}0.06$; P = 0.0067). There was a positive correlation between telomere length and telomerase activity (r = 0.9090; P < 0.0001). Transcriptions of both hTERT and c-MYC were also significantly decreased in the same manner. CONCLUSION: In the present cell culture model, WPE reduced telomere maintenance, which may provide a mechanistic link to the effect of walnuts on the viability of colon CSCs.

Recombinant Human Bone Morphogenetic Protein-2 Priming of Mesenchymal Stem Cells Ameliorate Acute Lung Injury by Inducing Regulatory T Cells

  • Jooyeon Lee;Jimin Jang;Sang-Ryul Cha;Se Bi Lee;Seok-Ho Hong;Han-Sol Bae;Young Jin Lee;Se-Ran Yang
    • IMMUNE NETWORK
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    • 제23권6호
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    • pp.48.1-48.21
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    • 2023
  • Mesenchymal stromal/stem cells (MSCs) possess immunoregulatory properties and their regulatory functions represent a potential therapy for acute lung injury (ALI). However, uncertainties remain with respect to defining MSCs-derived immunomodulatory pathways. Therefore, this study aimed to investigate the mechanism underlying the enhanced effect of human recombinant bone morphogenic protein-2 (rhBMP-2) primed ES-MSCs (MSCBMP2) in promoting Tregs in ALI mice. MSC were preconditioned with 100 ng/ml rhBMP-2 for 24 h, and then administrated to mice by intravenous injection after intratracheal injection of 1 mg/kg LPS. Treating MSCs with rhBMP-2 significantly increased cellular proliferation and migration, and cytokines array reveled that cytokines release by MSCBMP2 were associated with migration and growth. MSCBMP2 ameliorated LPS induced lung injury and reduced myeloperoxidase activity and permeability in mice exposed to LPS. Levels of inducible nitric oxide synthase were decreased while levels of total glutathione and superoxide dismutase activity were further increased via inhibition of phosphorylated STAT1 in ALI mice treated with MSCBMP2. MSCBMP2 treatment increased the protein level of IDO1, indicating an increase in Treg cells, and Foxp3+CD25+ Treg of CD4+ cells were further increased in ALI mice treated with MSCBMP2. In co-culture assays with MSCs and RAW264.7 cells, the protein level of IDO1 was further induced in MSCBMP2. Additionally, cytokine release of IL-10 was enhanced while both IL-6 and TNF-α were further inhibited. In conclusion, these findings suggest that MSCBMP2 has therapeutic potential to reduce massive inflammation of respiratory diseases by promoting Treg cells.

Helicobacter pylori 감염 소아에서 유전형과 위점막 림프구 (Association between Genotypes and Gastric Mucosal Lymphocytes in Helicobacter pylori-infected Children)

  • 염혜원;조민선;이미애;서정완
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • 제12권2호
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    • pp.140-149
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    • 2009
  • 목 적: H. pylori는 소아기에 감염되어 대부분 무증상으로 지내나 소수에서 위장질환을 일으킨다. 정확한 기전은 아직 밝혀지지 않았으나 세균의 병독성 인자, 숙주 인자, 환경 인자가 복합적으로 작용한다. 소아에서 H. pylori 유전형과 임상질환의 연관성은 지역과 인종에 따라 다양하고 위점막 림프구에 관한 연구도 일치된 보고가 없다. 이에 H. pylori 감염 소아에서 H. pylori 유전형과 위점막 림프구의 상관성을 알아보고자 하였다. 방 법: H. pylori 감염 소화궤양군 10명과 H. pylori 감염 위염군 15명에서 채취된 후 냉동보관 되었던 위전정부 생검 조직에서 DNA를 분리하고 cagA, cagE, vacA, babA2의 특이적인 시발체로 중합효소연쇄반응을 시행하여 H. pylori 유전형을 분석하였다. 유전형과 임상질환, 조직 소견 및 위점막 림프구의 상관성을 비교하였다. 결 과: H. pylori 유전형 중 cagA 양성률은 80%, cagE 양성률은 60%였다. vacA는 s1m1이 84%, s1m2가 16%였으며 babA2 양성률은 88%였다. 가장 흔한 유전형 조합은 cagA+/vacA s1m1+/babA2+ 조합으로 68%에서 관찰되었다. cagA, cagE, vacA, babA2의 유전형에 따른 임상질환과 조직 소견 및 CD3, CD4, CD8 T세포 수와 CD20 B세포 수는 점막 고유층과 상피세포 내 모두에서 유의한 차이가 없었다. 결 론: 소아 H. pylori 감염에서 cagA, cagE, vacA 및 babA2 유전형과 위점막 림프구는 유의한 상관성이 없었다. 향후, H. pylori가 숙주의 면역을 회피하고 지속적으로 살아남아 다양한 위장질환을 일으키는 병인을 규명하기 위해 H. pylori 감염 소아를 대상으로 위점막 면역반응에 대한 대단위 연구가 필요하다.

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A Comparison of Menthol Migration from Fillers to Filters and Mainstream Smoke in Leaf Tobaccos

  • Baek, Shin;Kim, Kun-Soo;Kwag, Jae-Jin;Jo, Si-Hyung
    • 한국연초학회지
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    • 제29권2호
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    • pp.98-103
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    • 2007
  • This study compares menthol migration from fillers to filters and mainstream smoke in a type of leaf tobacco and according to the moisture content differences at the range of $11{\sim}15\;%$. The leaf tobacco used in this study consisted of Korea flue cured upper leaves B1O (KFUB1), A40R (KFUA4), lower leaves C1L (KFLC1), CD4L (KFLCD4), burley upper leaves A3T (KBUA3), lower leaves D3W (KBLD3), Orient Basma I/III (OB), Orient Izmir BIG (OI), expanded tobacco (KET), and reconstituted sheet (KRC). Menthol migration to the filter and mainstream was measured under constant conditions for 80 days with intervals of 20 days. In the comparison between flue cured types, there were significant differences in the filter parts, as follows. KFUB1(34.4 %) KFUA4(37.4 %), KFLC1(43 %) and KFLCD4 were 55.7 %. In the comparision between other types of leaf tobaccos, KFUB1 was 34.4 % and KET was 52.6 % at filter parts. In the methol transfer to mainstream smoke was $16.5{\sim}24.2\;%$. The menthol migration to filters was measured based on the moisture content of $11{\sim}15\;%$ for the KFUB1 after storing it for 80 days. The menthol migrations were $36{\sim}40\;%$ at the moisture content of $11{\sim}15\;%$, respectively. The transfers to mainstream smoke were $12.8{\sim}15.8\;%$.

St. Jude 기계 판막을 이용한 승모판막 치환술의 20년 장기성적 (Twenty-year Experience of Mitral Valve Replacement with the St. Jude Medical Mechanical Valve Prosthesis)

  • 서연호;김공수;조중구
    • Journal of Chest Surgery
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    • 제39권7호
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    • pp.527-533
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    • 2006
  • 배경: 전북대학교 흉부외과에서 1984년 5월 이후 시행한 St. Jude 기계판막을 이용한 승모판막 치환술의 장기 성적을 후향적 방법으로 고찰해보고자 한다. 대상 및 방법: 1984년 5월부터 1996년 12월까지 전북대학교 흉부외과에서 St. Jude 기계판막을 이용하여 승모판막 치환술을 받은 총 95명의 환자를 대상으로 하였으며 추적관찰 기간은 2004년 5월까지였다. 결과: 환자의 나이는 19에서 69세의 범위를 보였다. 평균 추적관찰 기간(mean${\pm}$standard deviation)은 $10.6{\pm}4.2$ 년이었다. 조기 사망은 4.2% (4/95) 이고 만기 사망 환자는 9명이었으며 5년, 10년, 20년 총 생존율은 각각 $90.5{\pm}3.0%,\;87.9{\pm}3.4%\;83.2{\pm}4.6%$를 보였으며 판막관련사망이 없을 확률은 각각 $95.5{\pm}2.1%,\;94.3{\pm}2.4%\;91.0{\pm}3.9%$를 보여주었다. 7명의 환자에서 혈색전층으로 인한 합병증이 발생하였고(1.05%/patient-year) 15명의 환자에게서 의의 있는 항응고제관련 출혈이 발생하였다(3.56%/patient-year). 추적관찰 기간 중 기계판막의 구조적 결함은 없었으며 모든 합병증이 발생하지 않을 확률은 5년, 10년, 20년 동안에 각각 $82.0{\pm}3.9%,\;71.3{\pm}4.8%\;42.4{\pm}10.5%$였다. 결론: St. Jude기계판막은 내구성이 좋으며 판막에 관련된 합병증의 빈도가 낮아 안전하게 사용할 수 있는 판막이라 생각하며 다만 기계판막을 가지고 있는 환자에서 항응고제 복용과 용량 조정에 관한 적정한 추적관찰로 항응고제 관련 출혈의 빈도를 더욱 낮추어야 한다고 생각한다.}3mm$였다. 괴사된 부위에서 살아 있는 세포를 발견할 수 없었다. 결론: 냉동 후 해동과정은 폐조직의 전도율을 변화시키며 이는 이차 냉동 시 폐조직의 온도를 더욱 떨어뜨리고 세포파괴의 범위를 넓힌다., $3{\mu}mol/L,\;6{\mu}mol/L,\;9{\mu}mol/L$의 농도로 첨가하여 심근세포로의 분화를 유도하였다. 4주간의 배양이 끝난 후 각 실험 조직군의 세포들을 cell blocks으로 만든 후에, CD34, heavy myosin chain, troponin T, SMA에 대한 항체를 이용하여 면역형광염색을 시행하였고, 형광염색에 반응을 보인 세포들의 대략적 비율을 비교하였다. 결과: CD34, heavy myosin chain에 대하여는 모두 음성이었으나, SMA에 대해서는 $3{\mu}mol/L,\;6{\mu}mol/L$의 복강 내 지방조직에서 $5{\sim}10%$ 정도의 양성반응을 보였고, troponin T에 대하여는 피하지방조직과 복강 내 지방조직 모두에서 $6{\mu}mol/L$$9{\mu}mol/L$에서 $10{\sim}15%$ 정도의 양성 반응을 보였다. 결론: 본 연구 결과, 지방조직에서 추출한 중간엽 줄기세포는 심근세포로 분화할 수 있는 가능성이 충분히 있는 것이 확인되었으나, 분화유도 비율면에서는 만족할 수준이 되지 못하였으며, 심근세포로의 분화는 복부 피하지방과 복강 내 지방조직에서 모두 가능한 것으로 판단되었다. 대형조각 작품들 - 예를 들어 대형화된 미니별 조각이나 개념미술, 또는 대지예술 등 -은 풍경의 실재가 아니기 때문에 환경으로부터 구분된다고 언급하고 있다. 이들 조각은 더 이상 만져지는 실체이거나 점유하는 공간의 상징언어를 지닌 조각의 범주에 한정되지 않게 된다.

$Zn_{4}SnSe_{6}$$Zn_{4}SnSe_{6}:Co^{2+}$ 단결정에서 광학적 에너지 띠 및 열역학적 함수의 온도의존성 연구 (Temperature dependence of optical energy gaps and thermodynamic function of $Zn_{4}SnSe_{6}$ and $Zn_{4}SnSe_{6}:Co^{2+}$ single crystals)

  • 김덕태;김남오;최영일;김병철;김형곤;현승철;김병인;송찬일
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 제4회 영호남학술대회 논문집
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    • pp.25-30
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    • 2002
  • The ternary semiconducting compounds of the $A_{4}BX_{6}$(A=Cd, Zn, Hg; B=Si, Sn, Ge; X=S, Se, Te) type exhibit strong fluorescence and high photosensitivity in the visible and near infrared ranges, so these are supposed to be materials applicable to photoelectrical devices. These materials were synthesized and single crystals were first grown by Nitsche, who identified the crystal structure of the single crystals. In this paper. author describe the undoped and $Co^{2+}$-doped $Zn_{4}SnSe_{6}$ single crystals were grown by the chemical transport reaction(CTR) method using iodine of $6mg/cm^{3}$ as a transport agent. For the crystal. growth, the temperature gradient of the CTR furnace was kep at $700^{\circ}C$ for the source aone and at $820^{\circ}C$ for the growth zone for 7-days. It was found from the analysis of x-ray diffraction that undoped and $Co^{2+}$-doped $Zn_{4}SnSe_{6}$ compounds have a monoclinic structure. The optical absorption spectra obtained near the fundamental absorption edge showed that these compounds have a direct energy gaps. These temperature dependence of the optical energy gap were closely investigated over the temperature range 10[K]~300[K]

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