• Title/Summary/Keyword: T-cell lineage

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Cytologic Features of Malignant Lymphoma of the Uterine Cervix - A case report - (자궁경부 악성 림프종의 경부-질 도말소견 - 1 증례 보고 -)

  • Kim, Nam-Hoon;Park, Chan-Kum;Ko, Young-Hyeh;Park, Moon-Hyang;Lee, Jung-Dal
    • The Korean Journal of Cytopathology
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    • v.6 no.1
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    • pp.76-79
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    • 1995
  • The uterine cervix is an uncommon site of primary non-Hodgkin's lymphoma (NHL). Although the cytologic findings of NHLs are well known, most cervicovaginal smear of uterine NHLs give lower diagnostic yield than common epithelial malignancy because abnormal cells do not appear in the sample in the absence of surface ulceration. Herein, we describe cytologic findings of a case of uterine cervical NHL which was initially diagnosed by cervicovaginal smear. The tumor cells were relatively uniform, isolated, large-sized with scanty cytoplasm and round or indented nuclei. The nuclei had stippled chromatin and small nucleoli. Histologically and immunohistochemically the tumor was proven to be large cell lymphoma of T-cell lineage.

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Dynamic Transcriptome, DNA Methylome, and DNA Hydroxymethylome Networks During T-Cell Lineage Commitment

  • Yoon, Byoung-Ha;Kim, Mirang;Kim, Min-Hyeok;Kim, Hee-Jin;Kim, Jeong-Hwan;Kim, Jong Hwan;Kim, Jina;Kim, Yong Sung;Lee, Daeyoup;Kang, Suk-Jo;Kim, Seon-Young
    • Molecules and Cells
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    • v.41 no.11
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    • pp.953-963
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    • 2018
  • The stepwise development of T cells from a multipotent precursor is guided by diverse mechanisms, including interactions among lineage-specific transcription factors (TFs) and epigenetic changes, such as DNA methylation and hydroxymethylation, which play crucial roles in mammalian development and lineage commitment. To elucidate the transcriptional networks and epigenetic mechanisms underlying T-cell lineage commitment, we investigated genome-wide changes in gene expression, DNA methylation and hydroxymethylation among populations representing five successive stages of T-cell development (DN3, DN4, DP, $CD4^+$, and $CD8^+$) by performing RNA-seq, MBD-seq and hMeDIP-seq, respectively. The most significant changes in the transcriptomes and epigenomes occurred during the DN4 to DP transition. During the DP stage, many genes involved in chromatin modification were up-regulated and exhibited dramatic changes in DNA hydroxymethylation. We also observed 436 alternative splicing events, and approximately 57% (252) of these events occurred during the DP stage. Many stage-specific, differentially methylated regions were observed near the stage-specific, differentially expressed genes. The dynamic changes in DNA methylation and hydroxymethylation were associated with the recruitment of stage-specific TFs. We elucidated interactive networks comprising TFs, chromatin modifiers, and DNA methylation and hope that this study provides a framework for the understanding of the molecular networks underlying T-cell lineage commitment.

A Case of Unilateral Renal Lymphosarcoma in a Dog (개에서의 편측성 신장 림프육종 1예)

  • Cheong, Jongtae;Kim, Jae-Hoon;Yoon, Young-Min;Lee, Joo-Myoung;Kang, Tae-Young;Ko, Kyu-Ryeon;Park, Hyun-Jung
    • Journal of Veterinary Clinics
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    • v.31 no.1
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    • pp.73-76
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    • 2014
  • A 10-year-old, female spayed mixed-breed dog with a history of vomiting and anorexia was examined. Abnormal findings of comlete blood count and serum chemistry included polycythemia, thrombocytopenia, hyper-globulinemia and hypoalbuminemia. Abdominal radiographs revealed severe unilateral renomegaly, and ultrasonography showed a left-sided renal mass. During the operation, left kidney was resected. Cytologial and histopathological examinations revealed neoplastic lymphoid proliferation with high mitotic figures in renal mass. Immunohistochemistry revealed tumor cells were CD3-positive and CD79${\alpha}$-negative, consistent with T-cell lineage. The renal mass of this case was diagnosed as renal T cell lymphosarcoma.

Multicentric T cell lymphoma in a Maltese dog

  • Jung, Ji-Youl;Kang, Sang-Chul;Roh, In-Soon;Sohn, Hyun-Joo;Yun, Young-Min;Kim, Jung-Hun;Lee, Kyoung-Kap;An, Min-Chan;Bae, Jong-Hee;Kim, Jae-Hoon
    • Korean Journal of Veterinary Research
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    • v.47 no.1
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    • pp.85-89
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    • 2007
  • A case of multicentric high grade T cell lymphoma is reported in a 5-year-old male Maltese dog with generalized lymphadenopathy. The dog showed depression, anorexia, blindness, jaundice, arrhythmia, and hematuria for 8 months. Complete blood count and chemistry profile revealed anemia and increased alanine transferase, alkaline phosphatase, total bilirubin, and total cholesterol. Grossly, most of lymph nodes, spleen, and liver were enlarged and neoplastic masses were occupied in these tissues. Histologically, massive accumulation of small noncleaved neoplastic lymphocytes with high mitotic figures was observed in all lymph nodes and spleen. Infiltration of neoplastic lymphocytes was also noted in the lung, liver, kidney, eye, skin, muscle, and bone marrow of femur. Immunohistochemistry revealed that tumor cells were CD3-positive and but CD79a-negative, consistent with T-cell lineage. In our best knowledge, this is the first report of multicentric lymphoma clarified the origin of tumor cells in Korea.

Clinicopathologic and Survival Characteristics of Childhood and Adolescent Non Hodgkin's Lymphoma in Yazd, Iran

  • Binesh, Fariba;Akhavan, Ali;Behniafard, Nasim;Atefi, Aref
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.4
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    • pp.1585-1588
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    • 2014
  • Background: Data regarding childhood and adolescent non Hodgkin lymphomas in Iran are limited. The aim of this study was to assess the epidemiological and histomorphological features and survival of affected patients in our center. Materials and Methods: The clinicopathologic features and outcome of 44 children and adolescents with non Hodgkin lymphoma diagnosed during 2004-2012, were investigated retrospectively. The influence of potential prognostic parameters in overall survival was investigated by log-rank test and Cox regression analysis. Results: The mean age at presentation was $13.8{\pm}6.16$ years with a male predilection (M: F=3:1). Malignant lymphoma, not otherwise specified, diffuse large cell lymphoma and Burkitt lymphoma were the three most common histological types observed. The tumors were 36.4% intermediate grade, 27.3% high grade and 34.1% belonged to the malignant lymphoma not otherwise specified group. Immunohistochemistry findings were available in 39 cases. Out of these cases 33 (84.6%) had B cell lineage, 4 (10.25%) T cell lineage and 2 (5.12%) of the cases belonged to miscellaneous group. 3 year and 5 year survivals were 48% and 30% respectively and median survival was 36 months (95%CI=21.7-50.3 months). Overall survival in patients with high grade tumors was 19.5 months, in the intermediate group,79 months, and for malignant lymphomas not otherwise specified it was 33.6 months (p value=0.000). Conclusions: The survival rate for children and adolescents with non Hodgkin lymphomas at our center during 2004-2012 was at a low level.

Multicentric T cell lymphosarcoma in a Jeju native boar

  • Yang, Hyoung-Seok;Kang, Sang-Chul;Jung, Ji-Youl;Roh, In-Soon;Kim, Dae-Yong;Bae, Jong-Hee;Kim, Jae-Hoon
    • Korean Journal of Veterinary Research
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    • v.47 no.2
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    • pp.187-190
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    • 2007
  • A 7-year-old Jeju native boar was requested to the Veterinary Pathology Laboratory of Cheju National University with a clinical signs of anorexia, melena, lethargy and sudden death. At necropsy, four coalescing firm masses were occupied in the abdominal cavity between ventral surface of stomach and pancreas. Individual mass was a yellowish white in color and up to 6 cm in diameter. These masses were not encapsulated and bulged from the cut surface. Liver and spleen were enlarged and pale nodules were presented in these tissues. Some yellowish white nodules up to 5 mm in diameter were scattered in kidneys. Histopathologically, lymphoblastic tumor cells were occupied in the abdominal masses, multifocal areas of liver, kidneys, and spleen. Morphologically lymphoblastic tumor cells were round to oval in shape, and medium to large in size. They had round to oval nuclei, moderate amount of eosinophilic cytoplasm, and many mitotic figures. Immunohistochemistry revealed that tumor cells were CD3-positive and $CD79{\alpha}$-negative, consistent with T-cell lineage. Based on gross, microscopic findings and immunohistochemistry, this case was diagnosed as porcine multi-centric T cell lymphosarcoma. In animals, as in human, the T-cell lymphomas are generally more aggressive than B cell types and respond less well to therapy. In our best knowledge, this is the first report for porcine T cell lymphosarcoma in Korea.

Immunocytochemical Study on the Change of the Activated T Cells in Peripheral Blood of the Pulmonary Tuberculosis Patients (폐결핵환자의 말초혈액에서 Activated T Cell의 변화)

  • Ryu, Gyeong-Ryeol;Park, Une-Sook;Park, Chong-Hwa;Jeoung, Pan-Joon;Hwang, Young-Sil;Lee, Yang-Jae;Chang, Ga-Yong
    • Tuberculosis and Respiratory Diseases
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    • v.42 no.6
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    • pp.823-830
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    • 1995
  • Background: It has been found that Helper T cells in the peripheral blood are decreased in the cell mediated immunity in the pulmonary tuberculosis. But it has not been confirmed yet that only decrease in number of cells which has phenotype in the peripheral blood is defined to decrease in cell mediated immunity. The immunocytochemical study was performed to observe the change of the percentage of T-lymphocytes with their subsets and activated T cells in the peripheral blood of pulmonary tuberculosis and to know how many T cells would be activated, relative to resting cells in the peripheral blood. Methods: The peripheral blood obtained from twenty two patients and ten healthy controls were smeared on the gelatin coated slide glass prepared for of mononuclear cells. The double bridge technique of alkaline phosphatase-antialkaline phosphatase(APAAP) method was used. As the primary antibodies, $T_1$(anti-human T cell), $T_4$(anti-human helper/inducer T cells) and $T_8$(anti-human supressor/cytotoxic T cell) antibodies and interleukin-2 receptor (for early activated T cell), very late activation antigen (for activated cytotoxic T cell), T cell lineage specific activation antigen monoclonal actibodies were used. Results: 1) There were significantly decrease in the absolute number of $T_4$(+) cells but significantly increase of $T_8$(+) cells in the peripheral blood of pulmonary tuberculosis (p<0.05). 2) The percentage of $T_4$(+) cells showed significantly decrease in pulmonary tuberculosis but $T_8$(+)cells significantly increase(p<0.05). $T_4(+)/T_8(+)$ ratio showed significantly decrease in the peripheral blood of the pulmonary tuberculosis(p<0.05). 3) There were significantly increase in the absolute number of variable stages of activated T cells in the peripheral blood of the pulmonary tuberculosis(p<0.05). 4) The percentage of IL-2R, VLA-1, TLiSA were 6.45+1.56%, $7.64+1.34^*$, 10.45+1.16% in order which showed significantly increase in the peripheral blood of the pulmonary tuberculosis(p<0.05). Conclusion: We speculate that only a few percentage of T lymphocyte is activated in cell mediated immunity in pulmonary tuberculosis.

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