Cell-mediated immunity

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Topic: Cell-mediated immunity

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	Cell Mediated Immunity
		The second arm of the immune response is refered to as Cell Mediated Immunity (CMIR).
		These results demonstrate the specific (T-cell mediated) and non-specific (macrophage mediated) aspects of this type of cell mediated immunity.
		This page will discuss the cell-mediated immune response, focusing on the mechanisms involved.
	www.cehs.siu.edu /fix/medmicro/cmir.htm

	Cell-Mediated Immunity
		Any cell in the body is a potential target for one kind of virus or another.
		Sometimes the patient's own bone marrow — stored earlier and, if needed, treated to remove any cancer cells — is used.
		These microorganisms are engulfed by phagocytic cells, like macrophages, but evade the normal intracellular mechanisms that should destroy them.
	users.rcn.com /jkimball.ma.ultranet/BiologyPages/C/CMI.html

	Cell Mediated Immunity
		The formation of T cells that are actively engaged in cell-mediated immune responses is achieve through an extensive process of differentiation.
		The mature antigen responsive T cells are activated by antigen and differentiate into functional effector cells (Th, Td, Tc and Ts cells).
		The stem cells in the bone marrow undergo differentiation into T cell precursors and take up residence in the thymus.
	ntri.tamuk.edu /immunology/cmediated.html

	HON Allergy Glossary Cell-Mediated Immunity (CMI)
		Any immune reaction that can be transferred with immune serum is termed humoral immunity (as opposed to cell-mediated immunity).
		The branch of the immune system in which the reaction to foreign material is performed by specific defence cells ( killer cells, macrophage and other white blood cells) rather than antibodies.
		When blood is spun in centrifuge, the red blood cells fall to the bottom of the tube, leaving behind a straw-colored liquid called the serum.
	www.hon.ch /Library/Theme/Allergy/Glossary/immunity.html

	The Adaptive Immune System: Cell-Mediated Immunity: An Overview
		Cell-mediated immunity (CMI) is an immune response that does not involve antibodies but rather involves the activation of macrophages and NK-cells, the production of antigen-specific cytotoxic T-lymphocytes (def), and the release of various cytokines (def) in response to an antigen (def).
		In this section we will look at the mechanism for cell-mediated immunity and at how cell-mediated immunity helps to defend the body.
		There are two major branches of the adaptive immune responses: humoral immunity and cell-mediated immunity.
	www.cat.cc.md.us /courses/bio141/lecguide/unit3/cellular/cmioverview/cmioverview.html

	Induction of Cell-Mediated Immunity to Staphylococcus aureus in the Mouse Mammary Gland by Local Immunization with a Live Attenuated Mutant -- Gómez et al. 70 (8): 4254 -- Infection and Immunity
		Natural immunity: a T-cell-independent pathway of macrophage activation defined in the scid mouse.
		cells ( 38), mammary epithelial cells ( 2), pulmonary epithelial
		Cells from regional mammary gland lymph nodes of control (left panels) and immunized mice (right panels) were cultured in the presence or absence of whole heat-killed S.
	iai.asm.org /cgi/content/full/70/8/4254

	Cell-mediated immunity
		Produced by cells involved in both natural and specific immunity
		Although the focus has been on the production and action of cytokines on cells of the immune system, it is important to understand that many of them have effects on other cells and organ systems.
		Cells that can respond to a cytokine are:
	www.med.sc.edu:85 /bowers/cell-mediated.htm

	The Analyst - Internet Health Report: Treatment: Thymic Factors
		Th1 (T-cell Helper type 1) promote cell-mediated immunity (CMI) while Th2 (T-cell Helper type 2) induce humoral immunity (antibodies).
		White Blood Cell: (WBC): A blood cell that does not contain hemoglobin: a blood corpuscle responsible for maintaining the body's immune surveillance system against invasion by foreign substances such as viruses or bacteria.
		Thymic extracts have been shown to normalize the ratio of T-helper cells to suppressor cells whether the ratio is low as in AIDS, chronic infections and cancer, or high as found with allergies and autoimmune diseases like psoriasis and rheumatoid arthritis.
	www.digitalnaturopath.com /treat/T150849.html

	Vitamin E Supplementation Improves Cell-Mediated Immunity and Oxidative Stress of Asian Men and Women -- Lee and Fan Wan ; 130 (12): 2932 -- Journal of Nutrition
		cells (CD4), T-suppressor/cytotoxic cells (CD8), NK cells (CD56),
		Free radicals are also produced by cells of the immune system.
		immunity subsets and hydrogen peroxide production in T-lymphocytes
	nutrition.org /cgi/content/full/130/12/2932

	Science: Biology: Immunology - Open Site
		Antibodies can neutralize antigens, activate phagocytic cells, or recruit lytic enzymes to destroy foreign cells.
		Unlike B cells, T cells require antigen presentation via the major histocompatibility complex (MHC) for activation.
		B cells respond to the presence of antigens and differentiate into antibody-secreting plasma cells.
	open-site.org /Science/Biology/Immunology

	Estrogen replacement, aging, and cell-mediated immunity after injury -- Kovacs et al. 76 (1): 36 -- Journal of Leukocyte Biology
		Estrogen replacement, aging, and cell-mediated immunity after injury -- Kovacs et al.
		Estrogen replacement, aging, and cell-mediated immunity after injury
		Correspondence: Department of Cell Biology, Neurobiology, and Anatomy, Department of Surgery, Loyola University Chicago, Stritch School of Medicine, Building 110, Room 4237, 2160 South First Avenue, Maywood, IL 60513.
	www.jleukbio.org /cgi/content/abstract/76/1/36

	T-CMI
		Design an experiment to prove that CTL are susceptible to perforin-mediated cytotoxicity.
		The expression of more and higher affinity cytokine receptors by activated cells compared to resting cells keeps the immune response antigen-specific, even though the same cytokines are made in response to many different antigens.
		Naïve resting T cells are stimulated by antigen peptide presented on Class I MHC to cytotoxic CD8 T cells or Class II MHC to helper CD4 T cells, along with co-stimulatory signals from APC, to proliferate and differentiate into clones of fully activated effector T cells.
	www.microvet.arizona.edu /Courses/MIC419/Tutorials/TCMI.html

	ANTIOXIDANT FORMULA
		Ginkgo not only improves blood circulation, it also protects red blood cells and increases blood vessel tone, increases the uptake of oxygen and glucose in body tissue, and protects cell membranes in the brain as well as protecting the brain from free radical destruction and lipid peroxidation.
		In addition to preventing the development of the aforementioned disorders, this form of zinc also has been shown to protect cells and tissue from free radical damage by limiting their production, competing with pro-oxidant metals for binding sites, and by protecting molecules that are easily oxidized to form free radicals.
		Quercetin has shown significant antitumor activity against many cancers, such as squamous cell carcinoma, leukemia, and cancers of the breast, ovaries, colon, and rectum, as well as cancers found in the brain.
	www.cleanse.net /antioxidants.HTM

	CELL MEDIATED IMMUNITY
		A negative tuberculin sensitivity test cannot be interpreted as signifying lack of exposure to Mycobacterium tuberculosis unless other tests of cell mediated immunity are positive and cutaneous anergy is excluded.
		Application: A series of tests of lymphocyte function used in the assessment of immune deficiency states, particularly to distinguish defective cell mediated immunity from defective humoral immunity.
		Interpretation: Severe defects in all these tests are seen in congenital cell mediated immune deficiency states, severe combined immunodeficiency (SCID) and HIV infection.
	www.rcpa.edu.au /pathman/cell_med.htm

	MBIM Faculty, Immunology Track
		The biologic mechanisms underlying cell-mediated immunity to leukemia/tumors are being assessed for potential therapeutic interventions, particularly in the setting of autologous stem cell transplantation.
		The role of dendritic cells in eliciting tumor specific immunity particularly in the setting of minimal residual disease following stem cell transplantation is being examined.
		Novel purification methods of different chaperones are being examined for immunostimulatory activity in-vitro and in-vivo.The laboratory is studying whether HSP associated peptides can be endocytosed by dendritic cells, processed and presented in the context of MHC resulting in specific T-cell reactivity against tumors from which they were isolated.
	www.w3.arizona.edu /~mbim/immfaculty.html

	Healthnotes
		The skin, mucus secretions, and the acidity of the stomach are examples of innate immunity that act as barriers to keep unwanted germs away from more vulnerable tissues.
		Restoration of vitamin B12 stores by means of injections improved levels of these immune cells, suggesting an important role for vitamin B12 in immune function.
		The immune system is an intricate network of specialized tissues, organs, cells, and chemicals.
	www.healthwell.com /healthnotes.cfm?ContentID=1036001

	FDA/CFSAN Publications List - FY 1999
		Babu, U.S. Babu, U.S; Wiesenfeld, P.L; Jenkins, M.Y. Effect of dietary rosemary extract on cell-mediated immunity of young rats
		Singh, G; Curtis, W.C. "Plant cell and tissue culture for food ingredient production: An Introduction" IN Plant Cell and Tissue Culture for Food Ingredient Production
		Sega, G.A. Differential sensitivities of spermatogonial and postspermatogonial cell stages of the mouse to induction of unscheduled DNA synthesis by ethyl- and methylnitrosourea
	www.cfsan.fda.gov /~dms/pubs1999.html

	NY-ESO-1 Protein Formulated in ISCOMATRIX Adjuvant Is a Potent Anticancer Vaccine Inducing Both Humoral and CD8+ T-Cell-Mediated Immunity and Protection against NY-ESO-1+ Tumors -- Maraskovsky et al. 10 (8): 2879 -- Clinical Cancer Research
		NY-ESO-1 Protein Formulated in ISCOMATRIX Adjuvant Is a Potent Anticancer Vaccine Inducing Both Humoral and CD8+ T-Cell-Mediated Immunity and Protection against NY-ESO-1+ Tumors-- Maraskovsky et al.
		were protected against challenge with a B16 melanoma cell line
		monocyte-derived dendritic cells, and on maturation, these human
	clincancerres.aacrjournals.org /cgi/content/abstract/10/8/2879

	Susceptibility to Anti-Glomerular Basement Membrane Disease and Goodpasture Syndrome Is Linked to MHC Class II Genes and the Emergence of T Cell-mediated Immunity in Mice -- Kalluri et al. 100 (9): 2263 -- Journal of Clinical Investigation
		Susceptibility to Anti-Glomerular Basement Membrane Disease and Goodpasture Syndrome Is Linked to MHC Class II Genes and the Emergence of T Cell-mediated Immunity in Mice -- Kalluri et al.
		Susceptibility to Anti-Glomerular Basement Membrane Disease and Goodpasture Syndrome Is Linked to MHC Class II Genes and the Emergence of T Cell-mediated Immunity in Mice
		heterodimer protein is also not expressed on cell surface.
	www.jci.org /cgi/content/full/100/9/2263

	Synergistic Enhancement of Cell-Mediated Immunity by Interleukin-12 Plus Interleukin-2: Basis for Therapy of Cutaneous T Cell Lymphoma -- Zaki et al. 118 (2): 366 -- Journal of Investigative Dermatology
		Synergistic Enhancement of Cell-Mediated Immunity by Interleukin-12 Plus Interleukin-2: Basis for Therapy of Cutaneous T Cell Lymphoma -- Zaki et al.
		Synergistic Enhancement of Cell-Mediated Immunity by Interleukin-12 Plus Interleukin-2: Basis for Therapy of Cutaneous T Cell Lymphoma
		Key Words: CTCL T cell • IL-2 • IL-12 • IL-12 receptors.
	www.jidonline.org /cgi/content/abstract/118/2/366

	John P. Gluck
		Lewis, M. H., Gluck, J. P., Petitto, J. M., Hensley, L. L., and Ozer, H. Early social deprivation in nonhuman primates: Long-term effects on survival and cell-mediated immunity.
		Gluck, J. Apologizing to make it right: The place of reciprocity in ethics.
	www.unm.edu /~psych/faculty/gluck.html

	Thymus Extracts
		The thymus is responsible for many immune system functions, including the production of T lymphocytes, a type of white blood cell responsible for “cell-mediated immunity.” Cell-mediated immunity refers to immune mechanisms not controlled or mediated by antibodies.
		In a preliminary study in patients with early HIV infection, Thymomodulin improved several measures of immune function, including an increase in the number of T-helper cells, one of the goals in the treatment of HIV infection.
		The effect of a calf thymus acid lysate on bone marrow cell growth in vitro.
	www.truestarhealth.com /Notes/2916001.html

	Induction of Tumor-specific T Cell Immunity by Anti-DR5 Antibody Therapy -- Takeda et al. 199 (4): 437 -- The Journal of Experimental Medicine
		The development of autoimmunity in C57BL/6 lpr mice correlates with the disappearance of natural killer type 1–positive cells: evidence for their suppressive action on bone marrow stem cell proliferation, B cell immunoglobulin secretion, and autoimmune symptoms.
		the development of adaptive immunity subsequent to primary antibody-mediated
		Mac-1 (CD11b/CD18) is crucial for effective Fc receptor-mediated immunity to melanoma.
	www.jem.org /cgi/content/full/199/4/437

	The Adaptive Immune System: Cell-Mediated Immunity: Adoptive Immunotherapy and Immune Modulation
		There are two major branches of the adaptive immune responses: humoral immunity and cell-mediated immunity.
		Here it can be recognized by the TCR/CD8 a T8-lymphocytes and induce a strong cell-mediated immune response.
		Immune modulation is an attempt to improve or restore the body's immune responses artificially through the therapeutic use of cytokines, cell receptors, or other proteins that have been produced using recombinant DNA technology (see Unit 4).
	www.cat.cc.md.us /courses/bio141/lecguide/unit3/cellular/adoptive/adoptive.html

	Vaccines for Mucosal Immunity to Combat Emerging Infectious Diseases
		These lymphocyte-M cell interactions can occur in the pocket of the M cells and are mediated through thin cellular extensions, indicating that cell-cell interactions are an intricate part of the M-cell function and that they may facilitate transfer of luminal antigens, viruses, bacteria, and other protein components (3).
		The interaction of epithelial cells with T and B lymphocytes induces epithelial cells to differentiate into M cells in vitro (5), indicating the importance of lymphocyte-epithelial cell interactions for maintaining M cells in the follicle-associated epithelium of the Peyers patches (Figure 1).
		Although the precise function of M cells has not yet been established, recent studies indicate that they are involved in uptake, transport, processing, and possibly presentation of microbial antigens (3,4).
	www.cdc.gov /ncidod/eid/vol6no2/vanginkle.htm

	acquired immunity - multiple sclerosis encyclopaedia
		cell mediated immunity which principally operates through a type of lymphocyte called a T-cell which also originates in the bone marrow but is matured in an organ called the thymus.
		Another thing that happens when antibodies bind to cells is that serum proteins known as the complement bind to the immobilized antibodies and destroy the attached cells.
		When an antibody binds to an antigen on a cell, it acts as a signal for neutrophils, eosinophils, basophils and macrophages to engulf and kill (phagocytose) it in a process known as opsinisation.
	www.mult-sclerosis.org /acquiredimmunity.html

	Humoral Immunity
		For T cell-mediated -immunity, the answer is that T cells mature in the thymus (hence the name T cell) where they are exposed to all the body's potential antigens and those which are capable of binding to self are induced to die.
		For humoral immunity, the cells which are amplified (increased in number/stimulated to divide) are those which produce antibody, B cells.
		The existence of memory cells is the physiological manifestation of the priming of humoral immunity, i.e., for future recognition of specific antigens.
	www.mansfield.ohio-state.edu /~sabedon/biol2075.htm

	AADMC: In The News 2003: Pulmonary cell-mediated immunity against viral infections
		However, the influenza virus is very effective in evading this antibody-mediated immunity by re-assorting its genetic material during infection in other hosts, leading to expression of different surface proteins not recognized by the pre-existent antibodies.
		During initial encounter of the host with these viruses, dendritic cells in the lung which encounter the virus carry viral antigens to regional pulmonary lymph nodes.
		CD8+ T cells with immune capacity against the virus may persist for long time in secondary lymphoid organs.
	www.aaaai.org /aadmc/inthenews/news/2003archive/pulmonary_cell_mediated.html

	CD8+-T-Cell Immunity against Toxoplasma gondii Can Be Induced but Not Maintained in Mice Lacking Conventional CD4+ T Cells -- Casciotti et al. 70 (2): 434 -- Infection and Immunity
		demonstrated that cell-mediated immunity is a major factor responsible
		T cells were isolated and cultured by a limiting dilution assay method as described in Materials and Methods.
		effector cells cultured in the presence of antigen was determined based on a comparison with the results obtained with negative cultures to which no effector cells were added.
	iai.asm.org /cgi/content/full/70/2/434

	Prime-boost strategies for malaria vaccine development -- Dunachie and Hill 206 (21): 3771 -- Journal of Experimental Biology
		vaccine is likely to require induction of cell-mediated immunity.
		Persistence of protective immunity to malaria induced by DNA priming and poxvirus boosting: characterization of effector and memory CD8(+)-T-cell populations.
		Improving protective immunity induced by DNA-based immunization: priming with antigen and GM-CSF-encoding plasmid DNA and boosting with antigen-expressing recombinant poxvirus.
	jeb.biologists.org /cgi/content/full/206/21/3771

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In the News (Sat 25 May 13)