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Artykuły w czasopismach na temat „CD8”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Chatila, T. A., and R. S. Geha. "Phosphorylation of T cell membrane proteins by activators of protein kinase C." Journal of Immunology 140, no. 12 (1988): 4308–14. http://dx.doi.org/10.4049/jimmunol.140.12.4308.

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Abstract Activation of the enzyme protein kinase C (PKC) plays an important role in T cell activation. We investigated the phosphorylation of CD2, CD3, CD4, CD5, CD7, CD8, CD28 (Tp44), CD43 (sialophorin, gp115), and LFA-1 after incubation of human PBMC with the (PKC) activator PMA. These proteins were chosen for their role in transmembrane signal transduction (CD2, CD3, CD5, CD28, CD43), cell-cell interaction and adhesion (CD2, CD4, CD8, and LFA-1), or involvement in immunodeficiency states (CD43, CD7). CD5, CD7, CD43, and the alpha-chain of LFA-1 were found to be constitutively phosphorylated

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2

Semchenkova, Alexandra, Ekaterina Mikhailova, Irina Demina, et al. "Analysis of Antigen Expression in T-Cell Acute Lymphoblastic Leukemia by Multicolor Flow Cytometry: Implications for the Detection of Measurable Residual Disease." International Journal of Molecular Sciences 26, no. 5 (2025): 2002. https://doi.org/10.3390/ijms26052002.

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Multicolor flow cytometry (MFC) is a key method for assessing measurable residual disease (MRD) in acute lymphoblastic leukemia (ALL). However, very few approaches were developed for MRD in T-cell ALL (T-ALL). To identify MRD markers suitable for T-ALL, we analyzed the expression of CD2, CD3, CD4, CD5, CD7, CD8, CD10, CD34, CD45, CD48, CD56, CD99, and HLA-DR in T-ALL patients at diagnosis. The median fluorescence intensities (MFIs) of surface CD3, CD4, CD5, CD7, CD8, CD45, CD48, CD99, and CD16+CD56 were also evaluated at Day 15 and the end-of-induction (EOI). The MFC data from 198 pediatric T-

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3

Зыблева, С. В., and С. Л. Зыблев. "Cluster Analysis of Leukocyte Subpopulations in Kidney Transplantation." Гематология. Трансфузиология. Восточная Европа, no. 2 (November 8, 2021): 168–75. http://dx.doi.org/10.34883/pi.2021.7.2.005.

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Цель. Выявить варианты иммунного реагирования у пациентов при трансплантации почки на основе кластерного анализа, характеризующие течение посттрансплантационного периода. Материалы и методы. Обследовано 104 реципиента почечного трансплантата с терминальной стадией хронической болезни почек, которым выполнена трансплантация аллогенной почки, а также 90 здоровых добровольцев, составивших группу сравнения. Оценены уровни лейкоцитов с использованием метода проточной цитометрии по безотмывочной технологии с использованием моноклональных антител (Beckman Coulter и BD, США) CD4 PС7, CD8 FITC, CD3 PС5

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4

Zybleva, S. V., and S. L. Zyblev. "Immunological cluster complexes in kidney transplantation." Medical Immunology (Russia) 24, no. 1 (2022): 69–80. http://dx.doi.org/10.15789/1563-0625-icc-2212.

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Laboratory tests are significant for the detection of immunopathological disorders in kidney transplantation. As a rule, the choice of tests is carried out individually and is based on the clinical characteristics and the presumptive diagnosis. Most often, in patients after kidney transplantation, atypical and not always standard changes in immunological parameters are observed, which is associated with a combination of many factors leading to different immune responses. All this served as the basis for typing immunological parameters in renal allograft recipients using one of the methods of s

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5

Tjønnfjord, G. E., O. P. Veiby, R. Steen, and T. Egeland. "T lymphocyte differentiation in vitro from adult human prethymic CD34+ bone marrow cells." Journal of Experimental Medicine 177, no. 6 (1993): 1531–39. http://dx.doi.org/10.1084/jem.177.6.1531.

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Pluripotent lymphohematopoietic stem cells are probably confined to bone marrow cells expressing CD34 surface molecules. To investigate the capacity of adult human CD34+ bone marrow cells to differentiate along the T lymphoid lineage, we plated purified CD34+ cells from healthy adults in liquid culture on adherent thymic stromal cells prepared from HLA- or blood group-mismatched postnatal thymic tissue. We show that purified CD34+CD3-CD4-CD8- bone marrow cells contained progenitors with the ability to differentiate into CD4+ and CD8+ T lymphocytes expressing surface (s)CD3 and T cell receptor

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6

Damle, N. K., and L. V. Doyle. "Stimulation via the CD3 and CD28 molecules induces responsiveness to IL-4 in CD4+CD29+CD45R- memory T lymphocytes." Journal of Immunology 143, no. 6 (1989): 1761–67. http://dx.doi.org/10.4049/jimmunol.143.6.1761.

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Abstract Although both IL-2 and IL-4 can promote the growth of activated T cells, IL-4 appears to selectively promote the growth of those helper/inducer and cytolytic T cells which have been activated via their CD3/TCR complex. The present study examines the participation of CD28 and certain other T cell-surface molecules in inducing T cell responsiveness to IL-4. Purified small high density T cells were cultured in the absence of accessory cells with various soluble anti-human T cell mAb with or without soluble anti-CD3 mAb and their responsiveness to IL-4 was studied. None of the soluble ant

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7

Haynes, B. F., and C. S. Heinly. "Early human T cell development: analysis of the human thymus at the time of initial entry of hematopoietic stem cells into the fetal thymic microenvironment." Journal of Experimental Medicine 181, no. 4 (1995): 1445–58. http://dx.doi.org/10.1084/jem.181.4.1445.

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To determine events that transpire during the earliest stages of human T cell development, we have studied fetal tissues before (7 wk), during (8.2 wk), and after (9.5 wk to birth) colonization of the fetal thymic rudiment with hematopoietic stem cells. Calculation of the approximate volumes of the 7- and 8.2-wk thymuses revealed a 35-fold increase in thymic volumes during this time, with 7-wk thymus height of 160 microM and volume of 0.008 mm3, and 8.2-wk thymus height of 1044 microM and volume of 0.296 mm3. Human thymocytes in the 8.2-wk thymus were CD4+ CD8 alpha+ and cytoplasmic CD3 epsilo

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8

Abbott, Daniel, Steven Kroft, Maria Hintzke, et al. "Immunophenotypic Analysis of Peripheral T-Cell Lymphomas: A Single-Center Retrospective Review of Flow Cytometric Analysis." American Journal of Clinical Pathology 152, Supplement_1 (2019): S109. http://dx.doi.org/10.1093/ajcp/aqz121.012.

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Abstract Background Peripheral T-cell lymphomas (PTCLs) are heterogenous, mature T-cell neoplasms that are a diagnostic challenge, requiring a combination of morphologic assessment and ancillary studies. Flow cytometry (FC) is a tool used routinely in lymphoma diagnosis; however, most analyses are limited to B-cell evaluation and pathologists generally lack experience evaluating for PTCL. We aimed to describe the immunophenotypic aberrancies observed by FC in PTCL. Design PTCLs with FC were collected, excluding primary leukemic processes. Four- and eight-color FC data were reanalyzed with the

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9

Akhmatova, E. A., E. V. Sorokina, I. Zh IShubina, et al. "Innate immunity cells in a model of acute psoriasis-like inflammation in mice." Russian Journal of Biotherapy 22, no. 4 (2023): 43–51. http://dx.doi.org/10.17650/1726-9784-2023-22-4-43-51.

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Background. Experimental animal models of psoriasis helped to clarify the functions of inflammatory mediators, to reveal the contribution of innate or adaptive immune mechanisms, keratinocytes to the development and maintenance of inflammation in psoriasis.Aim. To study the subpopulation composition of immune cells of blood, skin, lymphoid organs and compare two methods of isolation of cells from the skin.Materials and methods. The study included 46 mice of the C57BL / 6 line, which were divided into 2 groups: experimental (n = 24) to reproduce a model of acute psoriasis-like dermatitis using

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10

Terstappen, LW, S. Huang, and LJ Picker. "Flow cytometric assessment of human T-cell differentiation in thymus and bone marrow." Blood 79, no. 3 (1992): 666–77. http://dx.doi.org/10.1182/blood.v79.3.666.bloodjournal793666.

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Using multidimensional flow cytometry we have defined and quantified the human T-cell differentiation pathway, focusing on those events occurring among the most immature thymocytes and putative bone marrow (BM) T-precursors. Early thymocytes were found to express the CD34 antigen and consisted of a mean 1.2% of cells within human pediatric (n = 9) and 2.0% in fetal thymi (n = 4). All CD34+ thymocytes were atypical blast by morphology, expressed intracytoplasmatic, but not cell surface, CD3, and were cell surface CD2+, CD5+, CD7+, CD38+, CD45+, CD45RA+, CD49d+, and LECAM-1(Leu8)high. CD34high t

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11

Raimondi, SC, FG Behm, PK Roberson, et al. "Cytogenetics of childhood T-cell leukemia." Blood 72, no. 5 (1988): 1560–66. http://dx.doi.org/10.1182/blood.v72.5.1560.1560.

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Abstract The karyotypes of 57 cases of childhood T-cell acute lymphoblastic leukemia (ALL) were analyzed to establish the cytogenetic profile in this disease. Three questions were of particular interest. Do the chromosomal changes in T-cell ALL preferentially affect bands where genes encoding the T-cell receptor for antigen (TCR) have been mapped? Do alterations involving the TCR gene regions appear with any notable frequency in B-progenitor ALL? Do chromosomal abnormalities in this disease relate to stage of T-cell ontogeny? A relatively high proportion of cases (65%) had a pseudodiploid kary

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12

Raimondi, SC, FG Behm, PK Roberson, et al. "Cytogenetics of childhood T-cell leukemia." Blood 72, no. 5 (1988): 1560–66. http://dx.doi.org/10.1182/blood.v72.5.1560.bloodjournal7251560.

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The karyotypes of 57 cases of childhood T-cell acute lymphoblastic leukemia (ALL) were analyzed to establish the cytogenetic profile in this disease. Three questions were of particular interest. Do the chromosomal changes in T-cell ALL preferentially affect bands where genes encoding the T-cell receptor for antigen (TCR) have been mapped? Do alterations involving the TCR gene regions appear with any notable frequency in B-progenitor ALL? Do chromosomal abnormalities in this disease relate to stage of T-cell ontogeny? A relatively high proportion of cases (65%) had a pseudodiploid karyotype at

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13

Tamiolakis, Demetrio, Ioannis Venizelos, Athanasia Kotini, Sylva Nikolaidou, and Nikolaos Papadopoulos. "Prevalence of CD8/CD4 Ratio in the Fetal Thymic Parenchyme in Down’s Syndrome." Acta Medica (Hradec Kralove, Czech Republic) 46, no. 4 (2003): 179–82. http://dx.doi.org/10.14712/18059694.2019.30.

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Aim: The maturation of most T- lymphocyte precursors takes place within the meshwork of thymic epithelial cells. Different steps of this process can be defined by immunologic phenotyping. The prothymocytes are positive for the terminal deoxynucleotidyl transferase (TdT) and give rise to cortical thymocytes, which express CD1, CD2, CD3, CD5, and both CD4 and CD8. These CD4 and CD8 double-positive cortical thymocytes differentiate into two lineages: CD4+ or CD8+ lymphocytes of the thymic medulla, by the tenth week of gestation. Our study points towards the determination of the CD8 cytotoxic/supp

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14

Blazar, B. R., A. H. Sharpe, P. A. Taylor, et al. "Infusion of anti-B7.1 (CD80) and anti-B7.2 (CD86) monoclonal antibodies inhibits murine graft-versus-host disease lethality in part via direct effects on CD4+ and CD8+ T cells." Journal of Immunology 157, no. 8 (1996): 3250–59. http://dx.doi.org/10.4049/jimmunol.157.8.3250.

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Abstract Efficient T cell proliferation requires costimulation via CD28/B7 or other pathways. Graft-vs-host disease (GVHD) is caused by activated donor T cells. We have found that the infusion of anti-B7.1 (CD80) + anti-B7.2 (CD86) mAb is effective in eliminating GVHD lethality induced by either CD8+ or CD4+ T cells. Donor CD4+ and CD8+ T cell expansion was inhibited by almost 100-fold as measured by enumerating thoracic duct lymphocytes (TDL) obtained early post-transplant. TDL retained anti-host responsiveness indicating that not all T cells were anergic. Although anti-CD80 or anti-CD86 mAb

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15

Distler, Eva, Anna Jürchott, Abdo Konur, et al. "The CD38-Positive and CD38-Negative Subsets of CD34(high)-Positive Primary Acute Myeloid Leukemia Blasts Differ Considerably in the Expression of Immune Recognition Molecules." Blood 112, no. 11 (2008): 2936. http://dx.doi.org/10.1182/blood.v112.11.2936.2936.

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Abstract Acute myeloid leukemia (AML) is thought to arise from a rare putative ‘leukemic stem cell’ that is capable of self-renewal and formation of leukemic blasts. Serial xenotransplantation studies in immunodeficient mice have shown that this leukemia-initiating cell resides at very low numbers within CD34(high)-positive CD38-negative AML cells. Thus, immunotherapeutic approaches successfully eradicating this cell compartment should result in cure from disease. The objective of our study was to characterize the immune phenotype of the CD38-negative and CD38-positive subsets of primary CD34(

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16

Blue, M. L., J. F. Daley, H. Levine, K. R. Branton, and S. F. Schlossman. "Regulation of CD4 and CD8 surface expression on human thymocyte subpopulations by triggering through CD2 and the CD3-T cell receptor." Journal of Immunology 142, no. 2 (1989): 374–80. http://dx.doi.org/10.4049/jimmunol.142.2.374.

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Abstract Human thymocytes bearing the CD4 and/or CD8 antigens can be fractionated into cells with an immature and more mature phenotype based on their quantitative expression of the CD3 Ag (J. Immunol. 138:3108; J. Immunol. 139:1065). We show that the expression of CD4 and CD8 on thymocyte subpopulations with low CD3 (CD3L) and high CD3 (CD3H) is regulated by activation through the CD2 molecule and perturbation of the CD3-T cell receptor complex (CD3-Ti). Similar to its previously reported effects on peripheral T cells, PMA was able to induce the down-regulation of surface CD4, but not CD8, on

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17

Barcena, A., MO Muench, AH Galy, et al. "Phenotypic and functional analysis of T-cell precursors in the human fetal liver and thymus: CD7 expression in the early stages of T- and myeloid-cell development." Blood 82, no. 11 (1993): 3401–14. http://dx.doi.org/10.1182/blood.v82.11.3401.3401.

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Abstract It has been proposed that the CD7 molecule is the first antigen expressed on the membrane of cells committed to the T-cell lineage during human fetal T-cell ontogeny. To further identify the pre-T cell subpopulation that migrates to the thymus early in ontogeny, we analyzed the phenotypic and functional characteristics of the fetal liver populations separated on the basis of CD7 expression. Three populations expressing different levels of CD7 were observed: CD7bright, CD7dull, and CD7-. A CD7bright population depleted of mature T, B, and myeloid cells (lineage negative, lin-) and most

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18

Barcena, A., MO Muench, AH Galy, et al. "Phenotypic and functional analysis of T-cell precursors in the human fetal liver and thymus: CD7 expression in the early stages of T- and myeloid-cell development." Blood 82, no. 11 (1993): 3401–14. http://dx.doi.org/10.1182/blood.v82.11.3401.bloodjournal82113401.

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It has been proposed that the CD7 molecule is the first antigen expressed on the membrane of cells committed to the T-cell lineage during human fetal T-cell ontogeny. To further identify the pre-T cell subpopulation that migrates to the thymus early in ontogeny, we analyzed the phenotypic and functional characteristics of the fetal liver populations separated on the basis of CD7 expression. Three populations expressing different levels of CD7 were observed: CD7bright, CD7dull, and CD7-. A CD7bright population depleted of mature T, B, and myeloid cells (lineage negative, lin-) and mostly compos

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19

Parra, E., A. G. Wingren, G. Hedlund, T. Kalland, and M. Dohlsten. "The role of B7-1 and LFA-3 in costimulation of CD8+ T cells." Journal of Immunology 158, no. 2 (1997): 637–42. http://dx.doi.org/10.4049/jimmunol.158.2.637.

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Abstract This study compares the ability of LFA-3 (CD58) and B7-1 (CD80) ligands to provide costimulatory signals for superantigen (SAg)-stimulated CD8+ and CD4+ T cells. We show that B7-1 and LFA-3 costimulation activate CD8+ T cells to proliferation, cytokine production (IL-2, TNF, and IFN-gamma), and cytotoxicity. A long-lasting proliferative response was observed after combined DR/B7-1/LFA-3 costimulation. Detailed analysis of SEA-activated CD8+ T cells revealed that maximal production of IFN-gamma was seen in LFA-3-costimulated cells, while production of IL-2 was mainly induced after B7-1

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Terstappen, LW, S. Huang, and LJ Picker. "Flow cytometric assessment of human T-cell differentiation in thymus and bone marrow." Blood 79, no. 3 (1992): 666–77. http://dx.doi.org/10.1182/blood.v79.3.666.666.

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Abstract Using multidimensional flow cytometry we have defined and quantified the human T-cell differentiation pathway, focusing on those events occurring among the most immature thymocytes and putative bone marrow (BM) T-precursors. Early thymocytes were found to express the CD34 antigen and consisted of a mean 1.2% of cells within human pediatric (n = 9) and 2.0% in fetal thymi (n = 4). All CD34+ thymocytes were atypical blast by morphology, expressed intracytoplasmatic, but not cell surface, CD3, and were cell surface CD2+, CD5+, CD7+, CD38+, CD45+, CD45RA+, CD49d+, and LECAM-1(Leu8)high. C

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Suda, T., and A. Zlotnik. "In vitro induction of CD8 expression on thymic pre-T cells. II. Characterization of CD3-CD4-CD8 alpha + cells generated in vitro by culturing CD25+CD3-CD4-CD8- thymocytes with T cell growth factor-beta and tumor necrosis factor-alpha." Journal of Immunology 149, no. 1 (1992): 71–76. http://dx.doi.org/10.4049/jimmunol.149.1.71.

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Abstract We previously reported that CD25 (IL-2R p55)-positive CD3-CD4-CD8- murine thymocytes can be induced to express CD8 alpha (Lyt-2) by transforming growth factor-beta plus TNF-alpha in the presence of IL-7 (which is necessary to maintain the viability and differentiation capacity of CD25+CD3-CD4-CD8- thymocytes in vitro). The majority of cells recovered after 2 to 3 days from these cultures expressed CD8 alpha (but not CD3 or CD4). In this study, we have characterized these in vitro generated CD3-CD4-CD8 alpha + thymocytes and compared them with normal CD3-CD4-CD8+ thymocytes. Unlike nor

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Vandekerckhove, B. A., J. F. Krowka, J. M. McCune, J. E. de Vries, H. Spits, and M. G. Roncarolo. "Clonal analysis of the peripheral T cell compartment of the SCID-hu mouse." Journal of Immunology 146, no. 12 (1991): 4173–79. http://dx.doi.org/10.4049/jimmunol.146.12.4173.

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Abstract Severe combined immunodeficiency (SCID) mice can be transplanted successfully with human fetal liver and thymus (SCID-hu mice). Precursor cells derived from the fetal liver differentiate in the thymus and migrate into the blood as mature T cells. In the present paper, the peripheral T cell compartment of such mice was studied. Peripheral WBC were activated by PHA and cultured in the presence of irradiated human feeder cells. The resultant cell population consisted exclusively of human CD1- CD2+ CD3+ CD7+ T lymphocytes; up to 4% of the T cells expressed the TCR gamma delta, whereas 95

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George, G. V., G. Scott, C. R. Syposs, A. G. Evans, and C. Casulo. "Primary Cutaneous Acral-type CD8-positive T-cell Lymphoproliferations: Widely Divergent Clinical Outcomes Despite Nearly Identical Histomorphology." American Journal of Clinical Pathology 162, Supplement_1 (2024): S87. http://dx.doi.org/10.1093/ajcp/aqae129.194.

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Abstract Introduction/Objective Non-epidermotropic and acral CD8(+) T-cell proliferations have recently been reclassified as lymphoproliferative disorders (LPDs) due to their indolent course clinical. Here, we describe two cases with similar histomorphology but disparate clinical outcomes, highlighting the diagnostic challenges. Methods/Case Report Case 1: An 89-year-old male developed a 2 cm erythematous papule on the forehead. Biopsy showed a non-epidermotropic pan-dermal lymphocytic infiltrate, a distinct grenz zone, and areas of necrosis. Case 2: A 53-year-old male presented with a rapidly

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He, Guangsheng, Ling Zhou, De Pei Wu, Aining Sun, and Miao Miao. "CD4+Treg in Immune Pathophysiology of Aplastic Anemia." Blood 108, no. 11 (2006): 3768. http://dx.doi.org/10.1182/blood.v108.11.3768.3768.

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Abstract Objective: To explore the possible immune pathophysiology of CD4+T regulatory (CD4+Treg) in acquired aplastic anemia (AA). Methods: According to the markers on membrane, cytokines, and effective mechanisms of CD4+Treg, the levels of CD4+CD25+Treg,CD4+CTLA-4+Treg,CD4+ICOS+Treg,CD4+PD-1+Treg,CD3+CD8−IL-10+Treg,CD3+CD8−TGF-β1+Treg,CD3+CD8−IL-Treg in the bone marrow of 23 cases with AA at active phase, 10cases with AA at recovery phase, 15 normal controls, were measured, and the relationship between CD4+Treg and priming immune factor-CD28 or effective immune factor-IFN-γ were also evaluat

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Giraldo, Nicolas, Natalia Bolaños, Adriana Cuellar, et al. "Proliferative dysfunction in chronically activated T lymphocytes from chagasic patients (70.1)." Journal of Immunology 188, no. 1_Supplement (2012): 70.1. http://dx.doi.org/10.4049/jimmunol.188.supp.70.1.

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Abstract Background: Trypanosoma cruzi persistence has been associated with cardiac and gastrointestinal tissue damage in nearly 30% of the infected individuals; however, the pathogenic mechanisms are yet unknown. This study’s goal was to compare the activation status and proliferative capacity of T lymphocytes among chronic chagasic patients and uninfected controls. Methodology: Twenty-seven chronic chagasic patients, 20 healthy individuals and 28 non-chagasic cardiomyopathy donors were analyzed. Peripheral blood cells were stained with CD3, CD4, CD8, CD28, HLA-DR and CD38. PBMCs were labeled

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Yang, S. Y., S. Rhee, K. Welte, and B. Dupont. "Differential in vitro activation of CD8-CD4+ and CD4-CD8+ T lymphocytes by combinations of anti-CD2 and anti-CD3 antibodies." Journal of Immunology 140, no. 7 (1988): 2115–20. http://dx.doi.org/10.4049/jimmunol.140.7.2115.

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Abstract Purified peripheral blood T lymphocytes and the CD8-CD4+ and CD4-CD8+ T cell subsets, exhaustively depleted of APC have been studied for their capacity to respond to mAb directed against the CD3-Ti Ag-specific TCR complex and against the CD2 SRBCR. It is demonstrated that high affinity IL-2R can be readily induced by either anti-CD3 and/or anti-CD2 stimulation. However, IL-2 production can be observed only in the CD4+CD8- T cell subset. These results clearly contrast data obtained with purified CD4-CD8+ T cells, which are able to proliferate when the CD3-Ti complex is activated in the

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Blue, M. L., D. A. Hafler, K. A. Craig, H. Levine, and S. F. Schlossman. "Phosphorylation of CD4 and CD8 molecules following T cell triggering." Journal of Immunology 139, no. 12 (1987): 3949–54. http://dx.doi.org/10.4049/jimmunol.139.12.3949.

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Abstract CD4 and CD8 molecules have been implicated in the regulation of T cell activation. In the present study, CD4 and CD8 were modified by increased phosphorylation when T cell clones or T cells were either exposed to phorbol-12-myristate- 13-acetate or were triggered via the CD3-T cell receptor complex. Activation of T cells through the CD2 sheep erythrocyte binding protein, using anti-T11(2) and -T11(3) antibodies, also resulted in CD4 and CD8 phosphorylation. These findings suggest that signals derived from two different receptor pathways can converge and result in similar molecular mod

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Galy, A., S. Verma, A. Bárcena, and H. Spits. "Precursors of CD3+CD4+CD8+ cells in the human thymus are defined by expression of CD34. Delineation of early events in human thymic development." Journal of Experimental Medicine 178, no. 2 (1993): 391–401. http://dx.doi.org/10.1084/jem.178.2.391.

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Studies of the most immature T cell progenitors in the human thymus have been hampered by the lack of markers and assays that define these cells. In this report we used a novel human fetal thymic organ culture system to determine the potential of T cell precursors isolated from human postnatal thymus, to differentiate into CD3+ thymocytes, and to investigate early stages of human T cell development. It was found that thymocytes that lack the markers CD3, CD4, and CD8 (triple negative [TN]) can differentiate in an allogeneic organotypic thymic culture. The capacity of TN thymocytes to different

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Hirano, Naoto, Marcus O. Butler, and Lee M. Nadler. "4-1BB (CD137) or CD40 Signaling Fails To Improve the Expansion of Antigen Specific T Cells Demonstrated with Engagement of TCR, CD28 and CD83 Ligand." Blood 104, no. 11 (2004): 2665. http://dx.doi.org/10.1182/blood.v104.11.2665.2665.

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Abstract Following the engagement of the T cell receptor by HLA class I and antigenic peptide, naïve CD8+ T cells are primed to receive one or more costimulatory signals. Some of these signals, which are upregulated on and delivered by mature dendritic cells, include members of the immunoglobulin superfamily such as CD80 and CD83. Using a K562 derived artificial antigen presenting cell (aAPC) that expresses HLA-A2, CD80, and CD83, we have shown that the coengagement of CD83 ligand:CD83 and CD28:CD80 induces prolonged and preferential expansion of antigen specific CD8+ T cells. Furthermore, we

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Papadimitriou, T. I., A. van Caam, J. Lemmers, et al. "AB0139 DEEP IMMUNE PHENOTYPING OF T LYMPHOCYTE SUBSETS IN SYSTEMIC SCLEROSIS PATHOPHYSIOLOGY AND FOLLOWING RESPONSE TO TARGETED CYTOTOXIC TREATMENT." Annals of the Rheumatic Diseases 81, Suppl 1 (2022): 1199.1–1199. http://dx.doi.org/10.1136/annrheumdis-2022-eular.3976.

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BackgroundAbnormalities in T lymphocyte populations are associated with the pathogenesis of many autoimmune diseases, such as systemic sclerosis (SSc). Various studies report on the aberrations of different T cell cytotoxic (CTL) and helper (Th) subsets that appear to be linked with inflammatory and/or fibrotic manifestations of patients with SSc. Since T cells seem to play a pivotal role in the pathophysiology of SSc, targeting the pathogenic T cell subsets might be a promising therapeutic option.ObjectivesHere we set out to comprehensively compare T lymphocyte phenotypes between SSc patients

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Zahran, Asmaa M., Khaled Saad, Khalid I. Elsayh, et al. "Myeloid-Derived Suppressor Cells and Costimulatory Molecules in Children With Allergic Rhinitis." Annals of Otology, Rhinology & Laryngology 128, no. 2 (2018): 128–34. http://dx.doi.org/10.1177/0003489418812902.

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Objectives: The aim of this study is to assess the level of myeloid-derived suppressor cells (MDSCs) and the expression of costimulatory molecules CD80 and CD86 on monocytes and their ligands (CD28) on T-lymphocytes in children with allergic rhinitis (AR). Methods: The study included 60 children with AR and 50 controls. Flow cytometry was performed to analyze MDSCs and the expression of costimulatory molecules CD80 and CD86 on monocytes and their ligands (CD28) on T-lymphocytes. Results: The percentages of total and monocytic MDSCs and the expression of costimulatory molecule CD86 on monocytes

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Araujo, Maria das Graças Pereira, Victor lima Soares, Alessandra Suelen Jardim Silva, et al. "Importance of Flow Cytometry in the Diagnosis of Sezary Syndrome in the State of Rio Grande Do Norte, Brazil." Blood 136, Supplement 1 (2020): 39–40. http://dx.doi.org/10.1182/blood-2020-143378.

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Introduction:Sézary Syndrome (SS) is a leukemic form of Fungal Mycosis (FM), a rare form of T-cell lymphoma, characterized by erythroderma, generalized lymphadenopathy and infiltration of neoplastic T cells (Sézary cells) with cerebriform nucleus on the skin, lymph nodes and peripheral blood, being observed predominantly in men and individuals over the age of 60 and black. In the diagnosis of SS / FM, at least one of the criteria must be observed: minimum absolute Sézary cells count of 1000/mm3, expansion of TCD4+ cells with a ratio CD4/CD8 &gt;10, loss of at least one mature T cell antige

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Kay, NE, N. Bone, M. Hupke, and AP Dalmasso. "Expansion of a lymphocyte population co-expressing T4 (CD4) and T8 (CD8) antigens in the peripheral blood of a normal adult male." Blood 75, no. 10 (1990): 2024–29. http://dx.doi.org/10.1182/blood.v75.10.2024.2024.

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Abstract Approximately 2% to 3% of circulating human T cells co-express CD4 and CD8 (CD4+, CD8+) T-cell antigens. These CD4+, CD8+ cells may be immature precursors that function to replenish functional T-cell subsets. We detected a very high level of CD4+, CD8+ cells in the peripheral blood lymphocytes of a healthy white male, ranging from 21% to 36%. The morphology of his peripheral blood lymphocytes was normal, and he has maintained an elevated level of CD4+, CD8+ cells without clinical disease over a 19-month observation period. The CD4+, CD8+ cells did not possess thymocyte membrane antige

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Kay, NE, N. Bone, M. Hupke, and AP Dalmasso. "Expansion of a lymphocyte population co-expressing T4 (CD4) and T8 (CD8) antigens in the peripheral blood of a normal adult male." Blood 75, no. 10 (1990): 2024–29. http://dx.doi.org/10.1182/blood.v75.10.2024.bloodjournal75102024.

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Approximately 2% to 3% of circulating human T cells co-express CD4 and CD8 (CD4+, CD8+) T-cell antigens. These CD4+, CD8+ cells may be immature precursors that function to replenish functional T-cell subsets. We detected a very high level of CD4+, CD8+ cells in the peripheral blood lymphocytes of a healthy white male, ranging from 21% to 36%. The morphology of his peripheral blood lymphocytes was normal, and he has maintained an elevated level of CD4+, CD8+ cells without clinical disease over a 19-month observation period. The CD4+, CD8+ cells did not possess thymocyte membrane antigen (CD6),

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Bertho, JM, MD Mossalayi, AH Dalloul, G. Mouterde, and P. Debre. "Isolation of an early T-cell precursor (CFU-TL) from human bone marrow." Blood 75, no. 5 (1990): 1064–68. http://dx.doi.org/10.1182/blood.v75.5.1064.1064.

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Abstract CD2-CD3-CD4-CD8- human bone marrow (BM) cells were previously shown to generate T-cell clones in vitro. This capacity was abolished after treatment of this population with anti-CD7 monoclonal antibody and complement. In this study, using rosetting with sheep erythrocytes, complement-dependent cytotoxicity, and specific immunoadherence method, we isolated a minor BM subset that contained more than 80% CD7+CD2-CD3- CD4-CD8- cells with small lymphoid cell morphology. They comprised most early T-cell precursors (CFU-TL) as they displayed high capacity to generate T-cell clones when cultur

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Bertho, JM, MD Mossalayi, AH Dalloul, G. Mouterde, and P. Debre. "Isolation of an early T-cell precursor (CFU-TL) from human bone marrow." Blood 75, no. 5 (1990): 1064–68. http://dx.doi.org/10.1182/blood.v75.5.1064.bloodjournal7551064.

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CD2-CD3-CD4-CD8- human bone marrow (BM) cells were previously shown to generate T-cell clones in vitro. This capacity was abolished after treatment of this population with anti-CD7 monoclonal antibody and complement. In this study, using rosetting with sheep erythrocytes, complement-dependent cytotoxicity, and specific immunoadherence method, we isolated a minor BM subset that contained more than 80% CD7+CD2-CD3- CD4-CD8- cells with small lymphoid cell morphology. They comprised most early T-cell precursors (CFU-TL) as they displayed high capacity to generate T-cell clones when cultured in lim

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Greenberg, JM, and JH Kersey. "Terminal deoxynucleotidyl transferase expression can precede T cell receptor beta chain and gamma chain rearrangement in T cell acute lymphoblastic leukemia." Blood 69, no. 1 (1987): 356–60. http://dx.doi.org/10.1182/blood.v69.1.356.356.

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Abstract The nuclear enzyme terminal deoxynucleotidyl transferase (TdT) is thought to contribute to the diversity of certain immunoglobulin and T cell receptor gene rearrangements through the addition of random nucleotides at their variable (V)-joining (J) region junctions. An acute lymphoblastic leukemia (ALL) with an immature T cell phenotype (CD7+, CD5+, CD1+/-, CD2+/-, CD3-, CD4-, CD8-) was found to be TdT+ with germline immunoglobulin heavy chain, T cell receptor beta chain, and T cell gamma chain genes. The data indicate that TdT expression can precede T gamma and T beta rearrangement du

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Greenberg, JM, and JH Kersey. "Terminal deoxynucleotidyl transferase expression can precede T cell receptor beta chain and gamma chain rearrangement in T cell acute lymphoblastic leukemia." Blood 69, no. 1 (1987): 356–60. http://dx.doi.org/10.1182/blood.v69.1.356.bloodjournal691356.

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The nuclear enzyme terminal deoxynucleotidyl transferase (TdT) is thought to contribute to the diversity of certain immunoglobulin and T cell receptor gene rearrangements through the addition of random nucleotides at their variable (V)-joining (J) region junctions. An acute lymphoblastic leukemia (ALL) with an immature T cell phenotype (CD7+, CD5+, CD1+/-, CD2+/-, CD3-, CD4-, CD8-) was found to be TdT+ with germline immunoglobulin heavy chain, T cell receptor beta chain, and T cell gamma chain genes. The data indicate that TdT expression can precede T gamma and T beta rearrangement during T ly

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Yang, S. Y., S. M. Denning, S. Mizuno, B. Dupont, and B. F. Haynes. "A novel activation pathway for mature thymocytes. Costimulation of CD2 (T,p50) and CD28 (T,p44) induces autocrine interleukin 2/interleukin 2 receptor-mediated cell proliferation." Journal of Experimental Medicine 168, no. 4 (1988): 1457–68. http://dx.doi.org/10.1084/jem.168.4.1457.

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Prior studies have shown that thymocytes, unlike peripheral T cells, do not proliferate in response to mitogenic combinations of anti-CD2 mAbs. The present study demonstrated that stimulation by a mitogenic anti-CD2 combination (9-1 plus 9.6) with anti-CD28 induced vigorous thymocyte proliferation in the absence of exogenous IL-2. This thymocyte proliferation was IL-2 dependent as shown by the complete inhibition using anti-IL-2-R mAbs. Induction of IL-2-R transcripts was detected in thymocytes stimulated by the anti-CD2 antibody combination alone or the anti-CD2 combination plus anti-CD28 ant

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Shaheen, M., L. Warmke, and M. Nassiri. "Focal Myositis with CD8+T-Cell predominance: an Inflammatory Myositis Mimicking a Soft Tissue Neoplasm." American Journal of Clinical Pathology 158, Supplement_1 (2022): S109. http://dx.doi.org/10.1093/ajcp/aqac126.231.

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Abstract Introduction/Objective FM is a rare self-limiting T-cell rich lesion arising within muscles of young adults as a solitary lesion and can be confused with a variety of neoplastic/inflammatory conditions or lymphoma. Here we describe a rare T-cell rich variant of FM with CD8 predominance. Methods/Case Report A 51-year-old female presented with two-month history of left trapezius swelling. MRI showed an enhancing tumor within the muscle, suspicious of sarcoma, less likely myeloma. Results (if a Case Study enter NA) Biopsy showed diffuse infiltration of small lymphocytes in a fibrotic bac

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Hori, T., and H. Spits. "Clonal analysis of human CD4-CD8-CD3- thymocytes highly purified from postnatal thymus." Journal of Immunology 146, no. 7 (1991): 2116–21. http://dx.doi.org/10.4049/jimmunol.146.7.2116.

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Abstract Human triple-negative (CD4-CD8-CD3-) thymocytes purified from postnatal thymus by the use of magnetic bead columns and cell sorting were cultured in bulk or cloned with a feeder cell mixture of irradiated PBL, irradiated JY cells, and PHA. Triple-negative thymocytes proliferated well under these culture conditions, and after 12 days in bulk culture they remained triple negative. Limiting dilution experiments revealed that the frequency of clonogenic cells in fresh triple-negative thymocytes was less than 1%. Of 40 clones obtained in a representative experiment, 37 were triple negative

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Kandilarova, Snezhina M., Atanaska I. Georgieva, Anastasiya P. Mihaylova, et al. "Immune Cell Subsets Evaluation as a Predictive Tool for Hepatitis B Infection Outcome and Treatment Responsiveness." Folia Medica 59, no. 1 (2017): 53–62. http://dx.doi.org/10.1515/folmed-2017-0008.

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AbstractBackground: The patient’s immune response is one of the major factors influencing HBV eradication or chronification, and it is thought to be responsible for the treatment success.Aim: Our study aimed to investigate whether cellular defense mechanisms are associated with the course of HBV infection (spontaneous recovery [SR] or chronification [CHB]) and with the therapeutic approach.Patients and methods: A total of 139 patients (118 with CHB, 21 SR) and 29 healthy individuals (HI) were immunophenotyped by flowcytometry. Fifty-six patients were treatment-naïve, 20 were treated with inter

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Koide, J., and E. G. Engleman. "Differences in surface phenotype and mechanism of action between alloantigen-specific CD8+ cytotoxic and suppressor T cell clones." Journal of Immunology 144, no. 1 (1990): 32–40. http://dx.doi.org/10.4049/jimmunol.144.1.32.

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Abstract We have previously demonstrated that fresh CD8+ T cells proliferate in response to autologous, alloantigen-primed CD4+ T cells, and differentiate into Ts cells, which inhibit the response of fresh T cells to the primary allogeneic stimulator cell but not irrelevant stimulators. Although such Ts do not have discernible cytolytic activity, like classical cytotoxic T cells (Tc) they express CD3 and CD8 on their surface and function in a class I MHC-restricted manner. Our study was an attempt to compare the surface phenotype and mechanism of action of Ts and Tc clones derived from the sam

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Butler, Marcus O., Osamu Imataki, Yoshihiro Yamashita, et al. "Human CD4+ T Cells Help CD8+ T Cells Proliferate Ex Vivo by Secreting Both IL-2/IL-21 and Upregulating IL-21R." Blood 116, no. 21 (2010): 4284. http://dx.doi.org/10.1182/blood.v116.21.4284.4284.

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Abstract Abstract 4284 While adoptive T cell therapy is a promising treatment modality for cancer, the optimal approach to generate T cell grafts ex vivo is currently unknown. CD4+ T cells help generate effective immune responses by sustaining CD8+ T cell proliferation, preventing exhaustion, and establishing long-lived functional memory. Incorporation of CD4+ T cell help to expand CD8+ T cells may provide a novel strategy to generate CTL grafts for adoptive therapy. In mouse models, common γ-chain receptor cytokines and CD40/CD40L can mediate CD4+ T cell help. However, CD4+ T cell help in hum

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Reddy, A. C., and K. S. Reddy. "Pediatric Patient With Neurological And Leukemic Peripheral Blood Involvement By Small Cell Variant Of ALK- Positive Anaplastic Large Cell Lymphoma (ALCL): Case Study." American Journal of Clinical Pathology 154, Supplement_1 (2020): S113—S114. http://dx.doi.org/10.1093/ajcp/aqaa161.248.

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Abstract Casestudy Anaplastic large cell lymphoma (ALCL), is a T-cell lymphoma typically consisting of large lymphoid cells including characteristic horseshoe- shaped hallmark cells. The rare small cell morphological variant of ALCL may pose a challenge in diagnosis, especially when the initial presentation is unusual. Results Our patient, a 7-year-old girl presented with a headache. A complete blood count showed leukocytosis and anemia. The smear was reported to have segmented neutrophils, reactive lymphocytes, and monocytes. A spinal tap was performed and flow analysis identified a minute ab

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Laharwani, H., K. Perrizo, S. Jain, and J. Lam. "A Rare Case of Chronic Lymphoproliferative Disorder of NK Cells with an Unusual Expression of CD57." American Journal of Clinical Pathology 154, Supplement_1 (2020): S101. http://dx.doi.org/10.1093/ajcp/aqaa161.221.

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Abstract Introduction/Objective Natural Killer cells (NK-cells) malignancies are extremely rare and the two NK-cell disorders involving the peripheral blood and bone marrow include chronic lymphoproliferative disorder of NK-cells (CLPDNK) and aggressive NK-cell leukemia (ANKL). ANKL is EBV associated with a prevalence in Asian adults and a fulminant clinical course leading to death within 2 months. Methods A 76-year-old female with a history of iron deficiency anemia presented for evaluation of lymphocytosis (78 TH/mm) and negative EBV with extreme fatigue, weight loss, and worsening weakness

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Battiwalla, Minoo, Paul K. Wallace, Laurie A. Ford, and Maria R. Baer. "Clinical and Pathological Presentation of T-Cell Large Granular Lymphocyte Proliferations (T-LGL): A Single Institution Experience." Blood 104, no. 11 (2004): 3865. http://dx.doi.org/10.1182/blood.v104.11.3865.3865.

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Abstract Proliferations of T-cell large granular lymphocytes (T-LGL) are a rare and heterogeneous disease entity characterized by a chronic course, cytopenias and circulating cytotoxic T lymphocytes. We present the results of a single institution retrospective review of the clinical presentation of T-LGL proliferations. A total of 23 patients evaluated for cytopenias were identified as having T-LGL by flow cytometry, ten male and thirteen female, with a median age of 67 years at diagnosis. Twelve patients had a prior malignancy (non-Hodgkins lymphoma=4, MDS/AML=4, breast cancer=2, squamous cel

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Зыблева, С. В., and О. А. Сердюкова. "Peculiarities of the Immune Status of Patients with Atopic Dermatitis." Лабораторная диагностика. Восточная Европа, no. 4 (January 18, 2021): 413–19. http://dx.doi.org/10.34883/pi.2020.9.4.006.

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Цель. Выявление особенностей проявлений состояния иммунного статуса пациентов с атопическим дерматитом на основе комплексной оценки характеризующих его клинико-иммунологических показателей.Материалы и методы. Обследовано 155 пациентов с диагнозом «атопический дерматит», а также 64 здоровых добровольца, составивших группу сравнения.Оценены у них уровни лейкоцитов, эозинофилов, CD3+CD8+, CD19+, CD3+, CD3-CD16+CD56+, CD3+CD16+CD56+, CD3+CD4+, CD3+HLA-DR+, CD3+CD8+, HLADR+, CD3+CD4+HLADR+, CD3+CD38+, CD3+CD8+CD38+, CD3+CD4+CD38+, CD3+CD4+CD25+, CD3+CD4+CD25+highCD127+low, IgM, IgG, IgA,IgЕ, C3-ком

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Sergeeva, Ekaterina Yu, Vladimir A. Khorzhevskii, and Tatiana G. Ruksha. "Pagetoid reticulosis." Vestnik dermatologii i venerologii 97, no. 6 (2021): 81–86. http://dx.doi.org/10.25208/vdv1239.

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Pagetoid reticulosis (PR) is a rare type of mycosis fungoides. Clinical symptoms of PR can mimic other skin diseases of papulosquamous, neoplastic, and infectious origin that hampers PR diagnostics. The main histopathologic feature of PR is dense intraepidermal infiltration by medium to large-size lymphocytes through the epidermis leading to pagetoid plaque formation. There are three common immunophenotypes of PR: CD4-positive T-helper phenotype (CD3+, CD4+, CD8); T-cytotoxic/suppressor (CD3+, CD4, CD8+); and double negative phenotype (CD3+, CD4, CD8). The clinical case of PR with rare immunop

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Gorczyca, Wojciech, and Henry Y. Dong. "Subset of T-Cell Prolymphocytic Leukemia Expresses CD117. Potential Target for Therapy." Blood 104, no. 11 (2004): 4540. http://dx.doi.org/10.1182/blood.v104.11.4540.4540.

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Abstract Introduction Excluding non-hematopoietic lesions, CD117 (c-kit) is expressed by erythroid, megakaryocytic and myeloid precursors, mature mast cells, subset of plasma cell neoplasm and occasional precursor lymphoblastic tumors. C-kit plays important role in T-cell development around birth, but the expression of CD117 in mature T-cell lymphoproliferations is rare. We present flow cytometry phenotypic data of 28 cases of T-cell prolymphocytic leukemia (T-PLL). Material and methods Multiparameter 4-color FC analysis was performed on peripheral blood and/or bone marrow aspirate samples usi

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