scholarly journals THE MEDIATOR OF CELLULAR IMMUNITY

1973 ◽  
Vol 137 (3) ◽  
pp. 660-674 ◽  
Author(s):  
D. D. McGregor ◽  
Pamela S. Logie
Keyword(s):  
Host Reaction ◽  
Proliferating Cells ◽  
Cellular Resistance ◽  
Effector Cells ◽  
Profound Impact ◽  
Antimitotic Activity ◽  
Antimitotic Drug ◽  
Autoradiographic Analysis ◽  
Central Lymph ◽  
Listeria Infection

The antimitotic drug vinblastine (Vbl) has a profound impact upon the specifically sensitized lymphocytes that transfer cellular resistance to Listeria monocytogenes. A 12-h pulse of the drug given to prospective donors during the first week of an immunizing Listeria infection inhibits the delivery of protective lymphocytes to the thoracic duct and their subsequent movement into an inflammatory exudate induced in the peritoneal cavity. The effect of Vbl is clearly related to its antimitotic activity, not to an effect on lymphocytes regardless of their position in the division cycle. This conclusion was drawn from an autoradiographic analysis of cells in the lymph of Vbl-treated rats and from failure of the drug to abrogate a known function of small lymphocytes, namely, their ability to initiate a graft-vs.-host reaction. The results imply that large lymphocytes, the rapidly proliferating cells in central lymph, are the principal effector cells responsible for transmitting resistance to L. monocytogenes and provide a plausible explanation for their rapid turnover and short circulating life-span.

scholarly journals THE MEDIATOR OF CELLULAR IMMUNITY

1971 ◽  
Vol 133 (2) ◽  
pp. 389-399 ◽  
Author(s):  
D. D. McGregor ◽  
F. T. Koster ◽  
G. B. Mackaness
Keyword(s):  
Listeria Monocytogenes ◽  
Antimicrobial Resistance ◽  
Thoracic Duct ◽  
Turnover Rate ◽  
Short Life ◽  
Small Lymphocyte ◽  
Short Life Span ◽  
Central Lymph ◽  
High Level ◽  
Listeria Infection

Thoracic duct cells from rats which have survived an infection with Listeria monocytogenes can confer a high level of antimicrobial resistance upon normal recipients. The cells which confer protection appear in the thoracic duct during the 1st wk of the immunizing infection, at a time when newly formed lymphocytes are being added to the lymph in substantially increased numbers. The protective cells differ in at least two respects from the majority of small lymphocytes in central lymph: they have a rapid turnover rate and a short life-span in the circulation. Evidence was also obtained that lymphopoiesis affecting the long-lived small lymphocyte, which belongs to the recirculating pool, is not increased during an acute Listeria infection.

scholarly journals GRAFT-VS.-HOST REACTION IN TISSUE CULTURE

1973 ◽  
Vol 138 (6) ◽  
pp. 1506-1520 ◽  
Author(s):  
Robert Auerbach ◽  
M. R. Shalaby
Keyword(s):  
Lymph Node ◽  
Bone Marrow Cells ◽  
Immunosuppressive Agents ◽  
Experimental System ◽  
Host Reaction ◽  
Effector Cells ◽  
Congenic Lines ◽  
X Irradiation

The primary purpose of this study has been to validate the in vitro graft-vs.-host reaction as an experimental system. Time-dose studies have been presented for cells obtained from spleen, thymus, cortisone-treated thymus, inguinal lymph node, mesenteric lymph node, thoracic duct, and bone marrow cells. Both the degree of splenomegaly and the onset of spleen enlargement were found to be dependent on the number and source of cells tested. The effect of several immunosuppressive agents was examined. Amantadine was found to suppress completely the graft-vs.-host reaction in vitro when present at a concentration of 75 µg/ml. Pretreatment of effector cells with mitomycin C prevented their subsequent ability to cause a graft-vs.-host reaction. The effect of X irradiation on immunocompetence of spleen cells in vitro paralleled the known effect of irradiation on in vivo immunocompetence. Preimmunization did not increase the number or effectiveness of immunocompetent cells when measured under standard in vitro conditions. Preimmunization did, however, permit persistence of immunocompetence after immunosuppressive doses of X irradiation. Studies using congenic lines, moreover, indicated that the preimmunization effect could be demonstrated in strain combinations differing only in factors determined by the H-2 complex of genes. A weak graft-vs.-host reaction could be detected in strain combinations not involving differences at the H-2 locus. The potential of the in vitro graft-vs.-host reaction as a highly reproducible, quantifiable, internally controlled, and experimentally accessible system for study of such critical problems as cell differentiation and cell interactions is discussed.

scholarly journals Toxic Epidermal Necrolysis and Graft-versus-Host Reaction: Revisiting a Puzzling Similarity

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
G. E. Piérard ◽  
T. Hermanns-Lê ◽  
P. Paquet ◽  
A. F. Rousseau ◽  
P. Delvenne ◽  
...  
Keyword(s):  
Toxic Epidermal Necrolysis ◽  
Inflammatory Cell ◽  
Skin Lesions ◽  
Graft Versus Host Reaction ◽  
Host Reaction ◽  
Drug Induced ◽  
Effector Cells ◽  
Graft Versus Host ◽  
Life Threatening ◽  
Skin Biopsies

Drug-induced toxic epidermal necrolysis (TEN) and acute cutaneous graft-versus-host reaction (GVHR) under immunopreventive therapy share some histopathological resemblance. So far, there are no serum biomarkers and no immunohistochemical criteria distinguishing with confidence and specificity the skin lesions of TEN and GVHR. Both diseases present as an inflammatory cell-poor necrotic reaction of the epidermis. This report compares three sets of 15 immunostaining patterns found in TEN, GVHR, and partial thickness thermal burns (PTTB), respectively. Three series of 17 skin biopsies were scrutinized. Irrespective of the distinct causal pathobiology of TEN and GVHR, similar secondary effector cells were recruited in lesional skin. Burns were less enriched in cells of the monocyte-macrophage disease. These cells likely exert deleterious effects in TEN and GVHR and cannot be simply regarded as passive bystanders. These life-threatening conditions are probably nursed, at least in part, by macrophages.

scholarly journals Functionally Heterogeneous CD8+ T-Cell Memory Is Induced by Sendai Virus Infection of Mice

1999 ◽  
Vol 73 (9) ◽  
pp. 7278-7286 ◽  
Author(s):  
Edward J. Usherwood ◽  
Robert J. Hogan ◽  
Graham Crowther ◽  
Sherri L. Surman ◽  
Twala L. Hogg ◽  
...  
Keyword(s):  
T Cells ◽  
Virus Infection ◽  
Sendai Virus ◽  
T Cell Memory ◽  
Proliferative Potential ◽  
Proliferating Cells ◽  
Effector Cells ◽  
High Frequencies ◽  
Cd8 T Cell Memory

ABSTRACT It has recently been established that memory CD8+ T cells induced by viral infection are maintained at unexpectedly high frequencies in the spleen. While it has been established that these memory cells are phenotypically heterogeneous, relatively little is known about the functional status of these cells. Here we investigated the proliferative potential of CD8+ memory T cells induced by Sendai virus infection. High frequencies of CD8+ T cells specific for both dominant and subdominant Sendai virus epitopes persisted for many weeks after primary infection, and these cells were heterogeneous with respect to CD62L expression (approximately 20% CD62Lhi and 80% CD62Llo). Reactivation of these cells with the antigenic peptide in vitro induced strong proliferation of antigen-specific CD8+ T cells. However, approximately 20% of the cells failed to proliferate in vitro in response to a cognate peptide but nevertheless differentiated into effector cells and acquired full cytotoxic potential. These cells also expressed high levels of CD62L (in marked contrast to the CD62Llo status of the proliferating cells in the culture). Direct isolation of CD62Lhi and CD62LloCD8+ T cells from memory mice confirmed the correlation of this marker with proliferative potential. Taken together, these data demonstrate that Sendai virus infection induces high frequencies of memory CD8+ T cells that are highly heterogeneous in terms of both their phenotype and their proliferative potential.

Maytansine-Induced Mitotic Arrest in Human Lymphoblasts

1977 ◽  
Vol 35 ◽  
pp. 460-461
Author(s):  
Tai-Te Chao ◽  
John Sullivan ◽  
Awtar Krishan
Keyword(s):  
Electron Microscopy ◽  
Cell Cycle ◽  
Transmission Electron Microscopy ◽  
Tubulin Polymerization ◽  
Vinca Alkaloids ◽  
Antimitotic Activity ◽  
Transmission Electron ◽  
Flow Microfluorometry ◽  
Brain Tubulin

Maytansine, a novel ansa macrolide (1), has potent anti-tumor and antimitotic activity (2, 3). It blocks cell cycle traverse in mitosis with resultant accumulation of metaphase cells (4). Inhibition of brain tubulin polymerization in vitro by maytansine has also been reported (3). The C-mitotic effect of this drug is similar to that of the well known Vinca- alkaloids, vinblastine and vincristine. This study was carried out to examine the effects of maytansine on the cell cycle traverse and the fine struc- I ture of human lymphoblasts.Log-phase cultures of CCRF-CEM human lymphoblasts were exposed to maytansine concentrations from 10-6 M to 10-10 M for 18 hrs. Aliquots of cells were removed for cell cycle analysis by flow microfluorometry (FMF) (5) and also processed for transmission electron microscopy (TEM). FMF analysis of cells treated with 10-8 M maytansine showed a reduction in the number of G1 cells and a corresponding build-up of cells with G2/M DNA content.

Incorporation of Cholesterol into Peripheral Nerve Myelin

1972 ◽  
Vol 30 ◽  
pp. 334-335
Author(s):  
Frank A. Rawlins
Keyword(s):  
Electron Microscope ◽  
Sciatic Nerve ◽  
Electron Microscope Autoradiography ◽  
Myelin Sheaths ◽  
Microscope Autoradiography ◽  
Grain Distribution ◽  
Sciatic Nerves ◽  
Autoradiographic Analysis ◽  
Old Mice ◽  
Short Times

Several speculations exist as to the site of incorporation of preformed molecules into myelin. The possibility that an autoradiographic analysis of cholesterol-1,2-H3 incorporation at very short times after injection might shed some light in the solution of that problem led to the present experiment.Cholesterol-1,2-H3 was injected intraperitoneally into 24 tenday old mice. The animals were then sacrificed at 10,20,30,40,60,90,120 and 180 min after the injection and the sciatic nerves were processed for electron microscope autoradiography. To analyze the grain distribution in the autoradiograms of cross and longitudinal sections from each sciatic nerve myelin sheaths were subdivided into three compartments named: outer 1/3, middle 1/3 and inner 1/3 compartments.It was found that twenty min. after the injection of cholesterol -1.2-H3 (Figs. 1 and 2), 55% of the total number of grains (t.n.g) found in myelin were within the outer 1/3 compartment, 9% were within the middle 1/3 and 36% within the inner 1/3 compartment

Uultrastructure of Microtubules

1972 ◽  
Vol 30 ◽  
pp. 252-253
Author(s):  
Ariaki Nagayama
Keyword(s):  
Fine Structure ◽  
Cultured Cells ◽  
Present Report ◽  
Confluent Monolayer ◽  
Purification Method ◽  
Vinca Rosea ◽  
L Cells ◽  
Antimitotic Activity ◽  
Monolayer Cultures ◽  
Rapid Purification

Vinblastine(Vb) or vincristine, alkaloid derived from Vinca rosea is known for its antimitotic activity by regrouping of microtubules into paracrystalline form within the cells. A rapid purification method of vinblastine-induced microtubular paracrystals(PC) has provided us with a fresh and pure microtubular material demonstrating the presence of a labile ATPase associated with the PC. The present report is concerned with the fine structure of purified microtubules of mammalian cultured cells.Confluent monolayer cultures of L cells were incubated for 20hrs with 10-5 M Vb (donated from Shionogi Seiyaku & Co., Osaka, Japan).

Quantitative Model-Based Image Analysis of NuMa Distribution Links Nuclear Organization with Cell Phenotype

2001 ◽  
Vol 7 (S2) ◽  
pp. 578-579
Author(s):  
David W. Knowles ◽  
Sophie A. Lelièvre ◽  
Carlos Ortiz de Solόrzano ◽  
Stephen J. Lockett ◽  
Mina J. Bissell ◽  
...  
Keyword(s):  
Image Analysis ◽  
Mammary Epithelial Cells ◽  
Nuclear Organization ◽  
Critical Role ◽  
Quantitative Model ◽  
Mammary Epithelial ◽  
Cell Phenotype ◽  
Proliferating Cells ◽  
Mitotic Apparatus ◽  
Model Based

The extracellular matrix (ECM) plays a critical role in directing cell behaviour and morphogenesis by regulating gene expression and nuclear organization. Using non-malignant (S1) human mammary epithelial cells (HMECs), it was previously shown that ECM-induced morphogenesis is accompanied by the redistribution of nuclear mitotic apparatus (NuMA) protein from a diffuse pattern in proliferating cells, to a multi-focal pattern as HMECs growth arrested and completed morphogenesis . A process taking 10 to 14 days.To further investigate the link between NuMA distribution and the growth stage of HMECs, we have investigated the distribution of NuMA in non-malignant S1 cells and their malignant, T4, counter-part using a novel model-based image analysis technique. This technique, based on a multi-scale Gaussian blur analysis (Figure 1), quantifies the size of punctate features in an image. Cells were cultured in the presence and absence of a reconstituted basement membrane (rBM) and imaged in 3D using confocal microscopy, for fluorescently labeled monoclonal antibodies to NuMA (fαNuMA) and fluorescently labeled total DNA.

Sign in / Sign up

Export Citation Format

Share Document