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Topic: Suppressor T cells

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Regulatory T cell

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	T cell - Wikipedia, the free encyclopedia
		T cells are a subset of lymphocytes that play a large role in the immune response.
		All their life T cells recognize only those antigens, for which they are specific and that are binded in a complex with the MHC molecule of the type they were presented with in the thymic cortex.
		T cells go into apoptosis if they cannot express their T cell receptors, if they aren't positively selected, or if they are removed by negative selection.
	en.wikipedia.org /wiki/T_cell (853 words)

	INDIRECT RECOGNITION AND ALLOSPECIFIC T SUPPRESSOR CELLS IN LIVER ALLOGRAFT RECIPIENTS (Site not responding. Last check: 2007-09-19)
		T cell reactivity to donor HLA-DR B1* peptides is detectable in acute and chronic rejection but not during quiescence.
		T cells from sequential samples of blood obtained over a period of 6-24 months were tested for reactivity to synthetic peptides corresponding to donor DRB1* antigens.
		T cell reactivity to donor HLA-DRB1 peptides was strongly associated with the development of acute and chronic rejection (p<0.001).
	www.a-s-t.org /library/abstracts99/150.htm (299 words)

	Howstuffworks "How Your Immune System Works"
		T cells and B cells are often found in the bloodstream but tend to concentrate in lymph tissue such as the lymph nodes, the thymus and the spleen.
		The T cell recognizes the foreign peptide attached to the MHC molecule and binds to it, an action that stimulates the T cell to either destroy or cure the infected cell.
		In reaction to the pollen the mast cells release histamine.
	health.howstuffworks.com /immune-system.htm/printable (5631 words)

	Immunoregulation in senescence: increased inducibility of antigen-specific suppressor T cells and loss of cell ... (Site not responding. Last check: 2007-09-19)
		Suppressor T cells were found to be more easily induced in old than in young mice but to suppress less efficiently the antibody response of cells from old than from young mice.
		The increased inducibility of antigen-specific suppressor T cells in old mice is compatible with the age-dependent decline of immune responsiveness to exogenous antigens.
		The loss of cell sensitivity to antigen-specific immunosuppression as well as the lack of evidence for increased nonspecific suppression in old mice is consistent with the age-related increase in autoimmune disorders.
	www.arclab.org /medlineupdates/abstract_6212931.html (225 words)

	Regulatory T Cells
		But these cells have been difficult to study, primarily because of the difficulty is isolating clones; that is, populations descended from a single cell.
		The antigenic peptides recognized by their TCRs tend to be self-peptides and perhaps the major function of Tr cells is to inhibit other T cells from mounting an immune attack against self components; that is, to protect the body against autoimmunity.
		Tr1 cells are abundant in the intestine, and their chief function may be to make the animal tolerant to the many antigens that are part of its diet.
	users.rcn.com /jkimball.ma.ultranet/BiologyPages/T/Treg.html (480 words)

	Dynamics of Pathogenic and Suppressor T Cells in Autoimmune Diabetes Development -- Gregori et al. 171 (8): 4040 -- The ...
		T cells from 8- and 16-wk-old NOD mice was 554 ± 34 and 909 ± 153 cpm, respectively.
		T cells from 8- or 16-wk-old, and diabetic NOD mice was 554 ± 173, 908 ± 107, and 1460 ± 184 cpm, respectively.
		T cells in the suppression of pathogenic responses in inflammatory
	www.jimmunol.org /cgi/content/full/171/8/4040 (5016 words)

	Immune System T Cells Lymphokines
		Typically identifiable by the T4 cell marker, helper T cells are essential for activating B cells and other T cells as well as natural killer cells and macrophages.
		Lymphokines (which are also secreted by B cells) and their relatives, the monokines produced by monocytes and macrophages, are diverse and potent chemical messengers.
		Produced by T cells and macrophages (as well as by cells outside the immune system), interferons are a family of proteins with antiviral properties.
	www.immunecentral.com /immune-system/iss8.cfm (551 words)

	In Vivo Instruction of Suppressor Commitment in Naive T Cells -- Apostolou and von Boehmer 199 (10): 1401 -- The ...
		LN cells from immunized mice and LN cells of nonimmunized BALB/c
		T cells is induced by immunosuppressive drugs and inhibited by T helper type 1 (Th1)- and Th2-inducing cytokines.
		Suppressor T cells generated by oral tolerization to myelin basic protein suppress both in vitro and in vivo immune responses by the release of transforming growth factor beta after antigen-specific triggering.
	www.jem.org /cgi/content/full/199/10/1401 (4532 words)

	An integrated view of suppressor T cell subsets in immunoregulation -- Jiang and Chess 114 (9): 1198 -- Journal of ...
		T cell response to SEB in vivo and in vitro (54).
		T cell response in experimental autoimmune encephalomyelitis (EAE): role of self and cross-reactive antigens in shaping, tuning, and regulating the autopathogenic T cell repertoire.
		Tissue-specific segregation of CD1d-dependent and CD1d-independent NK T cells.
	www.jci.org /cgi/content/full/114/9/1198 (7274 words)

	Tumor-Induced L-Selectinhigh Suppressor T Cells Mediate Potent Effector T Cell Blockade and Cause Failure of Otherwise ...
		T cell groups were synchronously prepared from D12 and D9 MCA-205-sensitized TDLN as in Fig.
		T cells in adoptive immunotherapy and the indirect mechanism of tumor rejection.
		T suppressor cells in mice rendered unresponsive to tumor antigens by intravenous injection of irradiated tumor cells.
	www.jimmunol.org /cgi/content/full/169/9/4811 (5691 words)

	Qa-1 restriction of CD8+ suppressor T cells -- Sarantopoulos et al. 114 (9): 1218 -- Journal of Clinical Investigation
		effector cells in the context of inflammatory stimuli (2-4).
		T and B lymphocytes and dendritic cells (28, 30).
		T cell response to infection and for autoimmunity
	www.jci.org /cgi/content/full/114/9/1218 (3040 words)

	IMP Research - Klein/Suppressor T cells (Site not responding. Last check: 2007-09-19)
		We are using T cell receptor and antigen transgenic mice in order to be able to follow the fate of “self-specific” T cells in various experimental conditions.
		While positive selection for self-MHC restriction occurs upon interaction with cortical epithelial cells, negative selection (removal of autoreactive T cells) is thought to be largely confined to the medulla as a consequence of interactions with dendritic cells or medullary epithelial cells.
		Results from Ts cells characterization in vitro indicate that these cells are anergic and that suppression of co-cultured conventional T cells is not mediated by soluble factors.
	www.imp.univie.ac.at /klein/kle_pro1.html (457 words)

	Suppressor T-cell levels are unreliable indicators of the impaired immune response following thermal injury.
		The presence of increased levels of suppressor T cells after thermal injury and their relevance remain controversial.
		It is unclear whether suppressor T cells are the cause or result of sepsis complicating thermal injury.
		Spleen cells from a standardized murine burn model and sham burn controls were studied and the relationship between the levels of suppressor cytotoxic T cells (CD8, Lyt-2+), helper T cells (CD4, L3T4+), response to concanavalin A (ConA) and to phytohemagglutinin (PHA) and interleukin-2 (IL-2) production was examined.
	www.aegis.com /aidsline/1992/oct/M92A0245.html (533 words)

	Certified Professionals: CD4+CD25+ Suppressor T Cells -- Shevach 193 (11): 41 -- The Journal of Experimental Medicine
		T cells and it is somewhat reassuring that
		T cells: a population of T cells with immune regulatory activities in vitro.
		T cells suppress naive and memory T cell proliferation and can be expanded in vitro without loss of function.
	www.jem.org /cgi/content/full/193/11/F41 (4740 words)

	Identifying Foxp3-expressing suppressor T cells with a bicistronic reporter -- Wan and Flavell 102 (14): 5126 -- ...
		T cells were activated by soluble anti-CD3 and anti-CD28 antibodies in the presence of irradiated APCs.
		cells in the bone marrow remain to be elucidated.
		Cocultured T cells were stimulated with soluble anti-CD3 and anti-CD28 in the presence of irradiated APCs.
	www.pnas.org /cgi/content/full/102/14/5126 (3836 words)

	Transplantation Medicine Part 1 Oral Medicine : RxBDS (Site not responding. Last check: 2007-09-19)
		Lymphocytes, particularly T lymphocytes (T cells), are instrumental in transplantation failure and are stimulated during rejection.
		T cells can be activated either by the donor’s or the recipient’s APCs, resulting in expression and production of lymphokines and cytokines that promote activation of cytotoxic T cells, activation of B cells, and activation of natural killer cell activity as well as promote enhanced expression of MHC and increased macrophage activity.
		Consequently, T cells are not activated, and cell-mediated cytotoxicity is impeded.
	www.rxbds.com /modules.php?name=News&file=article&sid=2 (4321 words)

	Essential Fats (DHA, EPA) - Vitacost (Site not responding. Last check: 2007-09-19)
		The authors measured total T cells, T-helper cells, T-suppressor cells, natural killer cells, and the synthesis of interleukin-1, interleukin-6, and tumor necrosis factor by peripheral blood mononuclear cells before and on Day 40 of fish oil supplementation.
		The ratio of T-helper cells to T-suppressor cells was significantly lower in malnourished patients.
		Retinoic acid was added to cells grown in the various media, and phorbol ester-induced superoxide generation, nitroblue tetrazolium reduction, and growth arrest were determined as measures of differentiation.
	www.vitacost.com /science/medstudies.cfm?litid=10 (2654 words)

	HUM-MOLGEN: Suppressor T Cells Inhibit Transplant Rejection Episodes
		Nicole Suciu-Foca and colleagues at Columbia University identified a suppressor T cell population that can be generated from peripheral blood cells upon repeated exposure to donor tissue.
		These suppressor T cells induced the expression of inhibitory receptors -- called immunoglobulin-like transcript 3 (ILT3) and ILT4--on antigen-presenting cells (APCs); these ILTs rendered the APCs unable to activate potentially harmful immune cells against the transplanted organ.
		Thus, conditioning of transplant recipients to generate donor-specific suppressor T cells or to induce expression of inhibitory ILT on APCs may achieve lasting organ-specific tolerance.
	hum-molgen.org /NewsGen/02-2002/msg05.html (294 words)

	Relationship of HIV-1 provirus load and T suppressor cells and HIV-1 envelope specific cytotoxic T lymphocytes in HIV ...
		Relationship of HIV-1 provirus load and T suppressor cells and HIV-1 envelope specific cytotoxic T lymphocytes in HIV seropositive asymptomatic individuals.
		Three possible mechanisms underlying immune dysfunction are increased HIV load, increased T suppressor (Ts) cells, and/or decreased HIV specific CTL activity.
		CONCLUSION: The inverse relationship of suppressor T cells and virus load with HIV specific CTL activity observed in this study suggest underlying factors which determines the course of HIV infection.
	www.aegis.com /aidsline/1993/nov/M93B5395.html (475 words)

	Ontogeny of CD4+CD25+ regulatory/suppressor T cells in human fetuses -- Darrasse-Jèze et al. 105 (12): 4715 -- ... (Site not responding. Last check: 2007-09-19)
		Ontogeny of CD4+CD25+ regulatory/suppressor T cells in human fetuses -- Darrasse-Jèze et al.
		T cells could hardly be detected at 13 weeks of gestation
		regulatory/suppressor T cells is consubstantial to the generation
	www.bloodjournal.org /cgi/content/abstract/105/12/4715 (214 words)

	DayStar Botanicals - LifeForce Energy and Immunes Support superfood super food green protein drink - LifeForce ...
		Astragalus reduces T suppressor cells and enhances the function of the adrenal cortex.
		Research has been done to show that Astragalus increases the strength of T-cells, the white blood cells of the body that attack the invaders that cause disease.
		Urine flow is improved by Astragalus, thereby reducing the potential of infection predominantly in the bladder.
	www.daystarbotanicals.com /products/astragalus.html (643 words)

	Chapter 2 References (Site not responding. Last check: 2007-09-19)
		Ion modulation of membrane permeability: Effect of cations on intact cells and on cells and phospholipid bilayers treated with pore-forming agents.
		Physiological concentrations of zinc inhibit the release of histamine from human basophils and lung mast cells.
		PMN cell phagocytic function in malnourished patients with zinc uptake.
	www.coldcure.com /html/ref2.html (1795 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #5674715 - Immunoregulatory T cells in man. Histamine-induced suppressor T cells are derived from a Leu 2+ (T8+) subpopulation distinct from that which gives rise to cytotoxic T cells
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Immunoregulatory T cells in man. Histamine-induced suppressor T cells are derived from a Leu 2+ (T8+) subpopulation distinct from that which gives rise to cytotoxic T cells
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=5674715 (149 words)

	CD75s is a marker of murine CD8+ suppressor T cells -- Zimring et al. 15 (11): 1389 -- International Immunology
		CD75s is a marker of murine CD8+ suppressor T cells -- Zimring et al.
		This is the first report of CD75s on murine cells and
		by T lymphocytes, these findings suggest that CD8
	intimm.oxfordjournals.org /cgi/content/abstract/15/11/1389 (230 words)

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