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Topic: K Cell

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In the News (Tue 21 May 19)

  K Cell
A K cell (aka killer cell) is a lymphocyte[?] with immunoglobulin Fc receptors, which allow it to bind to and kill antibody-coated cells by antibody-dependent cell-mediated cytotoxicity[?] (ADCC).
Once bound the cells act like T cells and "program" the target cell to "self-destruct" by apoptosis.
K cells are probably a sub-set of NK cells.
www.ebroadcast.com.au /lookup/encyclopedia/k_/K_Cell.html   (54 words)

 Conductivity cell   (Site not responding. Last check: 2007-11-03)
Cells of different physical configuration are characterized by their cell constant, K. This cell constant (K) is a function of the electrode areas, the distance between the electrodes and the electrical field pattern between the electrodes.
Since K (cell constant) is a "factor"which reflects a particular cell's physical configuration, it must be multiplied by the observed conductance to obtain the actual conductivity reading.
In a simplified approach, the cell constant is defined as the ratio of the distance between the electrodes, d, to the electrode area, A. This however neglects the existence of a fringe-field effect, which affects the electrode area by the amount AR.
www.corrosion-doctors.org /Electrochem/conductivity.htm   (287 words)

 Role of Ca2+-activated K+ channels in human erythrocyte apoptosis -- Lang et al. 285 (6): C1553 -- AJP - Cell Physiology
Inhibition of ionomycin (Iono)-induced cell shrinkage by increase of extracellular K
Inhibition of ionomycin-induced cell shrinkage by charybdotoxin and clotrimazole.
A receptor for phosphatidylserine-specific clearance of apoptotic cells.
ajpcell.physiology.org /cgi/content/full/285/6/C1553   (3821 words)

 U.K. backs cell phone recyclers | CNET News.com
The Fonebak project is the first mobile phone recycling plan to involve all five of the nation's cell phone operators as well as the Dixons Group of retail stores.
In the U.K., 15 million cell phones are effectively made redundant each year when users upgrade their handsets--which equates to 1,476 tons of potential hazardous waste, said Gordon Shield, chief executive of Shield Environmental.
Cell phone users can mail their handsets to Fonebak, and all five mobile operators are expected to provide special postage-paid envelopes to their customers.
news.com.com /2100-1033-959223.html   (556 words)

 Webvision: Amacrine cells
Amacrine cells of the vertebrate retina are interneurons that interact at the second synaptic level of the vertically direct pathways consisting of the photoreceptor-bipolar-ganglion cell chain.
A2 cells receive a great many amacrine inputs to their dendritic trees which could be from wider field cells than they are are themselves so giving them a much larger receptive field size than their actual dendritic tree size would indicate.
Dopamine cells are thought to have a function in the inner retina to uncouple AII amacrine cells from both their contacts with the depolarizing cone bipolar and the AII amacrine coupled network (Daw et al., 1990; Vaney, 1994a).
webvision.med.utah.edu /amacrines1.html   (2936 words)

 Red Cell Dehydration in Sickle Cell Disease
Cells with a markedly increased Hb S concentration are a prominent feature of sickle cell disease, as a consequence of the loss of K, Cl and water from the erythrocyte.
One of the distinguishing characteristics of sickle erythrocytes is the presence of cell dehydration.
Cell age appears to be one determinant of K-Cl cotransport activity in human red cells, since the system is active almost exclusively in normal reticulocytes and not in normal mature red cells.
sickle.bwh.harvard.edu /clt.html   (2935 words)

 Wormatlas K glossary
K is a blast cell that divides during late L1.
In males, the K cell is involved with proctodeum development where the ventral anterior portion of the cloaca forms an extensive region of contact with the gonad and this connection is formed by the daughter of K (K.a).
A cell that acts to directly “murder” a neighboring cell (Sulston and White, 1980; White et al., 1991).
www.wormatlas.org /glossaries/kglossary.htm   (673 words)

 SWBIC - Cell Structures   (Site not responding. Last check: 2007-11-03)
[Cell Biology: Microscopy, Kent State Univ.] (JPEG, 78.8 KB) An image of the endoplasmic reticulum outside the mitochondrial region at the periphery of the cell.
[Cell Biology: Microscopy, Kent State Univ.] (JPEG, 194 K) Image of the nucleus and filamentous actin of CHO cells.
[Cell Biology: Microscopy, Kent State Univ.] (JPEG, 160 K) Image of the nucleus and internal membranes of CHO cells.
www.swbic.org /links/   (521 words)

 Bcl-2 decreases voltage-gated K+ channel activity and enhances survival in vascular smooth muscle cells -- Ekhterae et ...
Cell shrinkage is an incipient hallmark of apoptosis in a variety of cell types.
) and the cells infected with bcl-2 (
Inhibition of neointimal cell bcl-x expression induces apoptosis and regression of vascular disease.
ajpcell.physiology.org /cgi/content/full/281/1/C157   (5820 words)

 Vitamin K
Vitamin K is involved as a cofactor in the posttranslational gamma-carboxylation of glutamic acid residues of certain proteins in the body.
Vitamin K is used to treat anticoagulant-induced prothrombin deficiency caused by warfarin, hypoprothrombinemia secondary to antibiotic therapy and hypoprothrombinemia secondary to vitamin C deficiency from various causes, including malabsorption syndromes.
Vitamin K is indicated in those with vitamin K deficiency, in some cases of hemorrhagic disease of the newborn, in some malabsorption syndromes and in some on long-term total parenteral nutrition.
www.pdrhealth.com /drug_info/nmdrugprofiles/nutsupdrugs/vit_0267.shtml   (2826 words)

 Functional Significance of Cell Volume Regulatory Mechanisms -- LANG et al. 78 (1): 247 -- Physiological Reviews
In some cells, electrolyte accumulation during RVI is accomplished by activation of Na channels and/or nonselective cation channels (159, 177, 1278, 1332).
Cell swelling increases microtubule stability and stimulates the expression of tubulin (511).
Alterations of cell volume are encountered during cryopreservation of organs (366, 394, 681).
physrev.physiology.org /cgi/content/full/78/1/247   (8158 words)

 TEACH Online | Glossary (K-O)
KS typically appears as pink or purple painless spots or nodules on the surface of the skin or oral cavity.
After an infection or a vaccination, some of the T cells that participated in the response remain as memory T cells, and can rapidly mobilize and clone themselves should the same antigen be re-encountered during a subsequent infection.
After the disease is eradicated, a portion of the T cell population engendered by the activated naive T cells constitute a reservoir of memory cells, which proliferate and respond very quickly to any recurrence of the disease.
www.teach-online.org /glossary3.html   (5222 words)

 Natural killer cell - Wikipedia, the free encyclopedia
NK cells are cytotoxic; small granules in their cytoplasm contain special proteins such as perforin and proteases known as granzymes.
NK cells are activated in response to interferons or macrophage-derived cytokines.
Patients deficient in NK cells prove to be highly susceptible to early phases of herpes virus infection.
en.wikipedia.org /wiki/K_cell   (883 words)

 Vitamin K - Wikipedia, the free encyclopedia
Vitamin K ("Koagulation" in German) is a group name for a number of related compounds, which have in common a methylated naphthoquinone ring structure, and which vary in the aliphatic side chain attached at the 3-position (see figure 1).
Vitamin K is involved in the carboxylation of certain glutamate residues in proteins to form gamma-carboxyglutamate residues (abbreviated Gla-residues).
The first published report of successful treatment with vitamin K of life-threatening hemorrhage in a jaundiced patient with prothrombin deficiency was made in 1938 at the University of Iowa Department of Pathology by Drs.
en.wikipedia.org /wiki/Vitamin_K   (2118 words)

 Analysis of Na+,K+-ATPase Motion and Incorporation into the Plasma Membrane in Response to G Protein-coupled Receptor ...
The role of the actin cytoskeleton in this process was evaluated by pretreating the cells with latrunculin B (LAT).
in COS-1 cells the amplitude of the motion of CV was increased
Rodriguez-Boulan, E., and Nelson, W.J. Morphogenesis of the polarized epithelial cell phenotype.
www.molbiolcell.org /cgi/content/full/14/3/1149   (4928 words)

 K cell - definition from Biology-Online.org
They have a receptor for the fc portion of igg and are probably of the mononuclear phagocyte lineage, though some may be lymphocytes.
natural killer cell are cd3 negative large granular lymphocytes, mediating cytolytic reactions that do not require expression of class i or II major histocompatibility antigens on the target cell.
lymphokine activated killer cells are nk cells activated by interleukin-2 (lak cells).
www.biology-online.org /dictionary/K_cell   (177 words)

 Improved Na/K Pump Animation   (Site not responding. Last check: 2007-11-03)
Note that initially Na+ ions (orange) are inside the cell and K+ ions (blue) are outside the cell.
The cell's plasma membrane is indicated as fl.
The binding of two K+ ions causes the hydrolysis of the covalently attached phosphate such that the phosphate is removed from the transport protein.
bio.winona.edu /berg/ANIMTNS/NaKpump2.htm   (291 words)

 U.K. cell phone providers move to restrict adult content   (Site not responding. Last check: 2007-11-03)
U.K. cell phone providers move to restrict adult content
Six providers of mobile phone service in the United Kingdom have agreed to honor a voluntary Code of Practice, reports the BBC News.
Amazon subsidiary CustomFlix will allow its members to add paid digital downloads to their distribution options next year by way of Unbox.
arstechnica.com /news/posts/1074554303.html   (519 words)

 Glucocorticoid-Induced Plasma Membrane Depolarization during Thymocyte Apoptosis: Association with Cell Shrinkage and ...
Shrunken cells have a decrease in forward scatter and a concomitant increase in side scatter and are shown in the left gate.
Hallahan C, Young DA, Munck A 1973 Timecourse of early events in the action of glucocorticoids on rat thymus cells in vitro: synthesis and turnover of a hypothetical cortisol-induced protein inhibitor of glucose metabolism and of a presumed RNA.
Deckers CL, Lyons AB, Samuel K, Sanderson A, Maddy AH 1993 Alternative pathways of apoptosis induced by methylprednisolone and valinomycin analyzed by flow cytometry.
endo.endojournals.org /cgi/content/full/142/12/5059   (4571 words)

Generally the presynaptic cell ends next to the dendrites or cell body of the post synaptic cell.
The ionic mechanism that occurs at the neuromuscular junction (the junction between motor neurons and muscle cells) is opening of non selective chemically activated channels in the post synaptic membrane.
Two inputs A and B when applied separately are insufficient to produce an action potential in the postsynaptic cell.
www.bioweb.uncc.edu /humanphys/cellto.htm   (690 words)

 Amazon.com: Puma Men's Cell Metal K Low: Apparel   (Site not responding. Last check: 2007-11-03)
Amazon.com: Puma Men's Cell Metal K Low: Apparel
Full-grain kangaroo leather upper with internal ribs provides midfoot stability, abrasion resistant toe overlay.
Polyurethane midsole with Puma Cell® in the heel.
www.amazon.com /Puma-Mens-Cell-Metal-Low/dp/B000074ZHD   (350 words)

 Satellite Phones, World Phones, International Cell Phones, BlackBerry and World Internet
Satellite Phones, World Phones, International Cell Phones, BlackBerry and World Internet
Cell Phone Rentals or Purchases Cell Phone Accessories
Sign up for travel tips and special offers!
www.roadpost.com   (100 words)

 wireless.itworld.com - Bank transactions come to U.K. cell phones
Security Tip: Three Google searches you must know
Adjustable fonts help unlock the small screen eWeek
Cingular turns cell phones into wallets in N.Y. trial CNET News.com
wireless.itworld.com /4274/050214cellbank   (384 words)

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