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	CD8 - Wikipedia, the free encyclopedia
		CD8 (cluster of differentiation 8) is a glycoprotein which serves as a co-receptor that is expressed on the surface of cytotoxic T cells.
		CD8 consists of an α and a ß chain, which both resemble an immunoglobulin-like domain that is connected to the membrane by a thin stalk.
		This affinity keeps the T cell receptor of the cytotoxic T cell and the target cell bound closely together during antigen-specific activation.
	en.wikipedia.org /wiki/CD8 (114 words)

	Product Detail for CD8 (IM2638)
		The CD8 antigen is a disulfide-linked dimer, which exists either as a CD8α homodimer or as a CD8αβ heterodimer.
		CD8 is also present on most thymocytes where it is frequently co-expressed with CD4, and on a subpopulation of bone marrow cells.
		CD8 is widely used as a marker of cytotoxic T lymphocytes.
	www.beckman.com /products/instrument/flowcytometry/ecatalog/productDetail.asp?partnumber=IM2638 (320 words)

	The Body: The Role of CD8+ Lymphocytes in the Control of SIV Viremia
		These investigators successfully depleted CD8+ lymphocytes in rhesus macaques infected with SIV-mac251 and examined the effect of this depletion on viral load, Gag p27 antigenemia, and SIV-Gag-specific CD8+ T cells during both the acute and chronic phases of infection, and on survival time.
		As CD8+ lymphocytes may be able to control virus by a number of specific and nonspecific mechanisms, it was reasonable to ask to what extent SIV-specific CD8+ cytotoxic T lymphocytes (CTL) might be involved in the control of virus in vivo.
		By their nature, induced CD8+ cells would serve as a second line of defense in situations where virus broke through antibody containment and was able to infect cells in the new host.
	www.thebody.com /niaid/viremia.html (1435 words)

	Human protein: P01732 - T-cell surface glycoprotein CD8 alpha chain precursor (T-lymphocyte differentiation antigen ...
		The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system.
		The CD8 antigen, acting as a coreceptor, and the T-cell receptor on the T lymphocyte recognize antigen displayed by an antigen presenting cell (APC) in the context of class I MHC molecules.
		Familial CD8 deficiency is a novel autosomal recessive immunologic defect characterized by absence of CD8+ cells, leading to recurrent bacterial infections.
	harvester.embl.de /harvester/P017/P01732.htm (1328 words)

	CD8 :: Molecules of HIV
		The CD8 protein comes secondary to the CD4 protein in the story of HIV infection, but CD8 and CD4 are quite closely related in that they are cell surface proteins found predominantly on T cells, and they both bind to HLA protein on other cells.
		CD8 is ordinarily found on the surface of killer T cells (as opposed to CD4, ordinarily found on the surface of helper T cells).
		CD8 binds to HLA class I on some other cell - which, as the diagram below shows, allows the T cell receptor protein to dock to HLA-I and check the antigen ("Ag") which HLA is presenting.
	www.mcld.co.uk /hiv/?q=CD8 (235 words)

	Immune system - Wikipedia, the free encyclopedia
		These TC cells also express CD8, which is attracted to portions of the Class I MHC molecule.
		TC cells with CD8 surface protein are called CD8+ T cells, and CD8+ T cells are generally classified as having a pre-defined cytotoxic role within the immune system.
		T cells with functionally stable TcRs express both the CD4 and CD8 co-receptors and are therefore termed "double-positive" T cells (CD4+/CD8+).
	en.wikipedia.org /wiki/Immune_system (4358 words)

	AEGiS-03CROI: CD8 subsets in HIV infected women in relation to disease and IDU Status: cross-sectional evaluation of ...
		AEGiS-03CROI: CD8 subsets in HIV infected women in relation to disease and IDU Status: cross-sectional evaluation of the HIV epidemiological research study (HERS).
		We have evaluated CD8 subsets in a cohort of women to further understand the relationship of these subsets with and disease status.
		Relationships between absolute CD4 count and each of the CD8 subsets were assessed statistically by analysis of variance (ANOVA), and multiple linear regression analysis.
	www.aegis.com /conferences/croi/1996/447.html (333 words)

	Clinical Trial: Safety and Effectiveness of Immunotherapy With Autologous HIV-Specific CD8 Cells in HIV Infected Adults
		CD8 cells isolated from a patient's blood and grown in large numbers in the laboratory may increase a patient's immune system response to HIV.
		Augmenting CD8 cell response to HIV by immunotherapy with CD8 cells may be a useful addition to drug therapy if the infused CD8 cells can survive long-term in vivo.
		CD8 cells will be isolated from the blood of HIV infected patients; the cells will be allowed to multiply in the laboratory, and patients will receive back their CD8 cells.
	clinicaltrials.gov /ct/show/NCT00110578 (807 words)

	High Levels of Human Immunodeficiency Virus Infection of CD8 Lymphocytes Expressing CD4 In Vivo -- Cochrane et al. 78 ...
		Sorting on the basis of differentiation phenotype was performed in two stages: first, enriched CD8 lymphocytes were sorted into antigen-naïve and antigen experienced subsets (B); then a portion of the antigen-experienced subset was retained for HIV DNA analysis, and the remainder was further sorted into memory and effector subtypes (C).
		increase in the prevalence of infected CD8 lymphocytes with
		Proposed infection route of CD8 lymphocytes circulating in vivo.
	jvi.asm.org /cgi/content/full/78/18/9862 (5057 words)

	CD8 T Cell-Mediated Killing of Cryptococcus neoformans Requires Granulysin and Is Dependent on CD4 T Cells and IL-15 -- ...
		CD8 T Cell-Mediated Killing of Cryptococcus neoformans Requires Granulysin and Is Dependent on CD4 T Cells and IL-15 -- Ma et al.
		A, Perforin and granulysin protein were detected by immunoblot on CD8 T cells that were unstimulated (IL-15 -) or stimulated with IL-15 (IL-15 +) in the absence of concanamycin A (CMA -) or in the presence of CMA (CMA +).
		CD8 T cells expressed granulysin and acquired anticryptococcal activity in response to PHA or CnM.
	www.jimmunol.org /cgi/content/full/169/10/5787 (6292 words)

	Neurosciences Report - Immunotherapy: CD8+ RTE T Cells
		They found that the amount of CD8+ T cells recently produced by the thymus predicted GBM progression even in patient groups with identical age ranges, whereas patient age itself failed to predict this progression in patient groups with very similar levels of these T cells.
		This implied that the amount of CD8+ T cells recently produced by the thymus fully accounted for the influence of patient age on malignant brain tumor progression.
		Finally, an idea about how the normally tiny population of CD8+ RTE T cells responds so dominantly to tumor protein fragments is being actively tested in hopes of using this knowledge to render much larger populations of T cells similarly responsive in brain tumor patients.
	www.csmc.edu /3986.html (1199 words)

	Chemicon - Product #IHCR2114-6 - IHC Select® Anti-CD8, prediluted, clone C8/144B
		CD8 molecule consists of two chains, termed alpha and beta chain, which are expressed as a disulfide-linked alpha/beta heterodimer or as an alpha/alpha homodimer on T cell subset (cytotoxic/suppressor T cells), thymocytes and NK cells.
		CD8 functions as a co-receptor in concert with TCR for binding nonpolymorphic regions of products of the Major Histocompatability Class I/peptide complex and has been implicated in regulation of T-cell growth.
		CD4 and CD8 are also used to differentiate between mycosis fungoides and cutaneous inflammatory process.
	www.chemicon.com /browse/productdetail.asp?ProductID=IHCR2114-6 (334 words)

	Escherichia coli Enterotoxin B Subunit Triggers Apoptosis of CD8+ T Cells by Activating Transcription Factor c-Myc -- ...
		on EtxB-induced apoptosis in a population of mesenteric CD8
		Receptor mediated apoptosis of CD8+ T cells by the B subunits of cholera-like enterotoxins.
		CD8+ T-cell apoptosis induced by Escherichia coli heat-labile enterotoxin B-subunit occurs via a novel pathway involving the NF-kB-dependent activation of caspase-8 and caspase-3.
	iai.asm.org /cgi/content/full/69/8/4923 (4236 words)

	Identification of the CD8 DE Loop as a Surface Functional Epitope. IMPLICATIONS FOR MAJOR HISTOCOMPATIBILITY COMPLEX ...
		Identification of the CD8 DE Loop as a Surface Functional Epitope.
		Human CD8 (hCD8) is a glycoprotein expressed on the surface of T cells that have specificity for antigens presented by MHC
		The crystal structure of the CD8 DE loop (24), highlighting the Leu-73-Thr-76 region as the exposed MHC class I binding site and the potential interactions of Lys-71 with Val-78 and Arg-72 with Phe-77 important for the structural stability of the DE loop.
	www.jbc.org /cgi/content/full/273/26/16442 (3172 words)

	Anti-human CD8 antibodies from RDI Divison of Fitzgerald Industries Intl
		SPECIFICITY: 30/32 kD MW lymphocyte surface antigen identified by monoclonal antibodies belonging to the CD8 cluster on a sub-population of peripheral blood T lymphocytes, 60% of thymocytes, and a limited number of malignancies of T cell origin.
		The CD8 positive T lymphocyte subpopulation has been characterised functionally as containing suppressor cells able to down regulate immune responses and also cells possessing cytotoxic activity.
		Antigen distribution: CD8 is present on 23+4% of normal peripheral blood lymphocytes and 80% of thymocytes.
	www.researchd.com /rdicdabs/cd8.htm (1141 words)

	Early Emergence of CD8+ T Cells Primed for Production of Type 1 Cytokines in the Lungs of Mycobacterium ...
		Several lines of evidence suggest that CD8 T cells are important in protection against tuberculosis.
		Lung cells from mice at 0, 2, and 3 weeks postinfection were stimulated with anti-CD3 and anti-CD28 antibodies or left unstimulated in the presence of monensin for 5 to 6 h.
		Counting antigen-specific CD8 T cells: a reevaluation of bystander activation during viral infection.
	iai.asm.org /cgi/content/full/67/8/3980 (5910 words)

	Type II Pneumocyte-CD8+ T-Cell Interactions . Relationship between Target Cell Cytotoxicity and Activation -- Zhao et ...
		CD8+ T-cell clones used in these experiments were generated either from wild-type or perforin-deficient mice (12).
		The level of SEAP activity triggered by CD8+ T-cell recognition at an E:T of 1:1 was not significantly different from the level of activity induced by a saturating concentration of soluble TNF-
		Cr-release assays were performed using the CD8+ T-cell clone 40-2 (squares), in parallel with ELISA performed on the supernatants (circles).
	ajrcmb.atsjournals.org /cgi/content/full/25/3/362 (5304 words)

	Human Immunodeficiency Virus Nef Induces Rapid Internalization of the T-Cell Coreceptor CD8{alpha}{beta} -- Stove et ...
		(37, 40, 55), repression of Nef-mediated CD8ß endocytosis
		The CD8 isoform CD8alphaalpha is not a functional homologue of the TCR coreceptor CD8alphabeta.
		CD8 lineage commitment in the absence of CD8.
	jvi.asm.org /cgi/content/full/79/17/11422 (6390 words)

	WHFoods: Beets
		The liver is the body's primary detoxification organ where toxic substances are broken down and eliminated, a process that generates a lot of free radicals.
		With the increased surveillance provided by these additional CD8 cells, the animals in one of the studies given beet fiber had fewer pre-cancerous changes.
		In stomach cancer patients, when scientists compared the effects of fruit and vegetable juices on the formation of nitrosamines--cancer-causing compounds produced in the stomach from chemicals called nitrates--beet juice was found to be a potent inhibitor of the cell mutations caused by these compounds.
	www.whfoods.com /genpage.php?tname=foodspice&dbid=49 (1667 words)

	Perforin-Independent CD8+ T-Cell-Mediated Cytotoxicity of Alveolar Epithelial Cells Is Preferentially Mediated by Tumor ...
		Perforin-Independent CD8+ T-Cell-Mediated Cytotoxicity of Alveolar Epithelial Cells Is Preferentially Mediated by Tumor Necrosis Factor-alpha.
		Cells in the assay were incubated for 6 h prior to harvesting (effector-to-target-cell ratio of 20:1).
		CD8 T Cell-Mediated Lung Damage in Response to the Extracellular Pathogen Pneumocystis Is Dependent on MHC Class I Expression by Radiation-Resistant Lung Cells
	ajrcmb.atsjournals.org /cgi/content/full/20/5/849 (6523 words)

	Chemicon - Product #CBL131F - Anti-CD8, clone UCH-T4 [T8]
		This antibody reacts with a 30/32 kDa molecular weight lymphocyte surface antigen belonging to the CD8 cluster present on the human cytotoxic/suppressor T cell subset.
		The antigen is expressed on a subpopulation of peripheral blood T lymphocytes, 60% of thymocytes, and a limited number of malignancies of T cell origin.
		The CD8 positive T lymphocyte subpopulation has been characterized functionally as containing suppressor cells able to down-regulate immune responses and also cells possessing cytotoxic activity.
	www.chemicon.com /browse/productdetail.asp?ProductID=CBL131F (284 words)

	Starnbach Lab
		H2-M3 restricted CD8+ T cells are not required for MHC class Ib restricted immunity against Listeria monocytogenes, Journal of Experimental Medicine, 2006, 203:383-391.
		Hematopoietic cells are required to initiate a Chlamydia trachomatis-specific CD8+ T cell response.
		CD8+ T-cells Recognize a Novel Inclusion Membrane Associated Protein from the Vacuolar Pathogen Chlamydia trachomatis.
	starnbachlab.med.harvard.edu /publications.htm (632 words)

	CD8 Coreceptor Extinction in Signaled CD4+CD8+ Thymocytes: Coordinate Roles for Both Transcriptional and ...
		CD8 Coreceptor Extinction in Signaled CD4+CD8+ Thymocytes: Coordinate Roles for Both Transcriptional and Posttranscriptional Regulatory Mechanisms in Developing Thymocytes -- Cibotti et al.
		CD4 and CD8 coreceptor RNAs, resulting in their rapid elimination.
		Destabilization of coreceptor RNA was shown for CD8
	mcb.asm.org /cgi/content/abstract/20/11/3852 (356 words)

	The Well Project: cd4 cell, cd4 t cell, cd4 cell count, cd8 cell, cd8 t cell
		CD4 and CD8 cells are white blood cells that play important roles in your body’s immune response.
		CD8 cell counts usually rise over time in HIV+ people, but why and how these increases relate to the health of your immune system is not well understood.
		CD4 and CD8 cell tests are simple blood tests ordered by your doctor.
	www.thewellproject.org /Treatment_and_Trials/First_Things_First/Understanding_CD4_and_CD8_Cells.jsp (1105 words)

	Clinical Trial: A Phase I Study of Autologous, Activated CD8(+) Lymphocytes Expanded In Vitro and Infused With or ...
		During weeks 13 and 16, indium 111 radio labelled cells are injected to permit determination of the distribution and pharmacokinetics of the infused cells.
		Effects of adoptive immunotherapy with autologous CD8+ T lymphocytes on immunologic parameters: lymphocyte subsets and cytotoxic activity.
		A phase 1 study of adoptive transfer of autologous CD8+ T lymphocytes in patients with acquired immunodeficiency syndrome (AIDS)-related complex or AIDS.
	clinicaltrials.gov /ct/show/NCT00000680 (987 words)

	CD8 Cells: Suppressive Factors Discovered (Site not responding. Last check: 2007-10-24)
		Direct contact was not needed, as the CD8 cells could be in a separate compartment, separated from the infected cells by a filter, and they still stopped HIV growth.
		Laboratory studies of samples from patients showed that in those whose disease progressed, the CD8 cells lost much of their ability to inhibit HIV in this way.
		Unfortunately, efforts to identify the substance or substances were unsuccessful; however, other research indicated that the mechanism of action seemed to be inhibition of the LTR (long terminal repeat) of HIV.
	www.aids.org /atn/a-238-02.html (671 words)

	CD8+ T-Cell Numbers Predict the Response to Antiviral Therapy in HIV-1-Infected Children -- RESINO et al. 53 (2): 309 ... (Site not responding. Last check: 2007-10-24)
		CD8+ T-Cell Numbers Predict the Response to Antiviral Therapy in HIV-1-Infected Children -- RESINO et al.
		HIV-1-infected children were separated into two groups according to CD8+ T cells baseline: 10 children CD8+ <25% and 31 children CD8+ >25%.
		HIV-1-infected children were separated into two groups according to CD8+ T cells baseline.
	www.pedresearch.org /cgi/content/full/53/2/309 (2334 words)

	Familial CD8 deficiency due to a mutation in the CD8{{alpha}} gene -- de la Calle-Martin et al. 108 (1): 117 -- Journal ...
		CD8 molecules are expressed on the cell surface either as an
		(b) CD8ß expression studied by Western blot analysis in two controls (C1 is a primary immunodeficient patient with low CD8 T cells and C2 is a healthy adult) and in the CD8-deficient patient.
		CD8 is needed for development of cytotoxic T cells but not helper T cells.
	www.jci.org /cgi/content/full/108/1/117 (3773 words)

	CD4/CD8 Cell Counts
		HIV-specific CD8+ T cell proliferation is coupled to perforin expression and is maintained in nonprogressors.
		In contrast to the median number of CD4+ T lymphocytes, the median number of CD8+ T lymphocytes increased 2-fold from 1169 cells/mm3 at entry to 2477 cells/mm3 at follow-up in these 21 coinfected children (P =.002).
		No such variability was seen in the CD4:CD8 ratio or in the total number of CD3+ T lymphocytes, however, and persons maintained a fixed, discrete range of CD4 values when followed for periods of 2 or 5 years, even among those with initial values less than 300/mm3.
	www.aras.ab.ca /test-cd4.html (6647 words)

	IQ Products : (Site not responding. Last check: 2007-10-24)
		Monoclonal antibodies clustered as CD8 detect most thymocytes and a subpopulation of both NK cells and peripheral blood T cells.
		CD8 acts as a co-receptor with the T
		CD8 monoclonal antibodies are commonly used in routine immunomonitoring and in the determination of CD4/CD8 ratios in HIV/AIDS patients.
	www.iqproducts.nl /product.php?p=20&id=8 (89 words)

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