scholarly journals In Vitro Effects of X-radiation on White Blood Cells and Blood Platelets

Blood ◽  
1957 ◽  
Vol 12 (8) ◽  
pp. 733-745 ◽  
Author(s):  
RICHARD WAGNER ◽  
NORMA MEYERRIECKS ◽  
CARROLL Z. BERMAN
Keyword(s):  
Oxygen Uptake ◽  
Dehydrogenase Activity ◽  
Blood Cells ◽  
Blood Platelets ◽  
Sodium Succinate ◽  
White Blood Cells ◽  
Succinic Dehydrogenase ◽  
Endogenous Respiration ◽  
Glycerophosphate Dehydrogenase ◽  
Wide Range

Abstract 1) Alkaline phosphatase activity of leukocytes is enhanced by radiation with 50,000 r. This disturbance accentuates the inherent aging process of white blood cells and may be explained by changes in the cell envelope. 2) X-radiation diminishes the endogenous oxygen uptake of leukocyte-platelet suspensions by approximately 20 per cent. This response to radiation is demonstrable at exposures of as little as 5,000 r. The decreasing effect is diminished when substrates such as sodium succinate or α-glycerophosphate are added, within a wide range of their concentration. With increasing substrate concentration the decrease due to radiation approaches that of the endogenous respiration and even exceeds it in some of the experiments. 3) In pure blood platelets a similar decreasing x-radiation effect occurs for endogenous respiration as well as succinic dehydrogenase activity; α-glycerophosphate dehydrogenase activity, on the other hand, is enhanced. 4) The oxygen uptake in leukocyte-platelet suspensions due only to leukocytes can be calculated. While the percentage radiation decrease of pure leukocytes is unchanged for endogenous and succinate activity, the decrease for α-glycerophosphate as substrate reaches considerably higher levels (68 per cent compared with 8.2 per cent in leukocyte-platelet suspensions). Thus α-glycerophosphate dehydrogenase activity seems to be most sensitive to x-radiation. It was shown in one of our previous studies that α-glycerophosphate dehydrogenase is one of the most important respiratory enzymes in leukocytes. 5) The glycolytic system in leukocytes remains intact following exposure to radiation with 50,000 r.

scholarly journals INCREASING NONSPECIFIC STABILITY OF SERVICE DOGS

2021 ◽  
Vol 245 (1) ◽  
pp. 64-71
Author(s):  
A.A. Ishtudov ◽  
◽  
V.G. Semenov ◽  
D.A. Nikitin ◽  
E.N. Ivanova ◽  
...  
Keyword(s):  
Blood Cells ◽  
Intramuscular Injection ◽  
White Blood Cells ◽  
Service Dogs ◽  
German Shepherd ◽  
Nonspecific Resistance ◽  
Humoral Factors ◽  
Wide Range ◽  
Biochemical Profiles ◽  
The Right

A biopreparation Dog-Stim-N-B was developed and a scientific and practical justification was given for its feasibility in the canine center for raising dogs of the German shepherd breed. Se-lective mobilization of morphological and biochemical profiles of blood, cellular and humoral factors of nonspecific resistance of dog organism is established against the background of intramuscular injection of first-tested biopreparation Dog-Stim-N-B and previously tested Prevention-N-E. The biologics used in the experiments showed a wide range of bio-effects: activated the production of red blood cells and increased the concentration of hemoglobin in the blood of dogs, that is, im-proved hematopoiesis, but did not have a stimulating effect on the production of white blood cells; caused physiological eosinophilia, moderate neutrophylopenia with neutrophilic nucleus shift to the right and lymphocytosis; increased protein metabolism, mainly due to synthesis of albumin and γ-globulin fractions; activated cellular and humoral factors of nonspecific resistance of the organism.

scholarly journals The expanding role(s) of eosinophils in health and disease

Blood ◽  
2012 ◽  
Vol 120 (19) ◽  
pp. 3882-3890 ◽  
Author(s):  
Elizabeth A. Jacobsen ◽  
Richard A. Helmers ◽  
James J. Lee ◽  
Nancy A. Lee
Keyword(s):  
Graduate School ◽  
Blood Cells ◽  
White Blood Cells ◽  
Basic Research ◽  
Medical Graduate ◽  
Parasitic Infections ◽  
Consensus Opinion ◽  
Wide Range ◽  
Health And Disease ◽  
Healthy Persons

Abstract Surprisingly, the role(s) of eosinophils in health and disease is often summarized by clinicians and basic research scientists as a pervasive consensus opinion first learned in medical/graduate school. Eosinophils are rare white blood cells whose activities are primarily destructive and are only relevant in parasitic infections and asthma. However, is this consensus correct? This review argues that the wealth of available studies investigating the role(s) of eosinophils in both health and disease demonstrates that the activities of these granulocytes are far more expansive and complex than previously appreciated. In turn, this greater understanding has led to the realization that eosinophils have significant contributory roles in a wide range of diseases. Furthermore, published studies even implicate eosinophil-mediated activities in otherwise healthy persons. We suggest that the collective reports in the literature showing a role for eosinophils in an ever-increasing number of novel settings highlight the true complexity and importance of this granulocyte. Indeed, discussions of eosinophils are no longer simple and more often than not now begin with the question/statement “Did you know …?”

THE PRODUCTION OF PURPURA BY DERIVATIVES OF PNEUMOCOCCUS

1926 ◽  
Vol 43 (1) ◽  
pp. 111-106
Author(s):  
Hobart A. Reimann ◽  
Louis A. Julianelle
Keyword(s):  
Red Blood Cells ◽  
Hemolytic Activity ◽  
Blood Cells ◽  
Blood Platelets ◽  
White Blood Cells ◽  
Red Cells ◽  
Severe Anemia ◽  
Marked Diminution ◽  
Derivatives Of

A study has been made of the variation in number of the blood platelets, and the red and white blood cells of white mice injected with pneumococcus extract. The blood platelets were greatly diminished after the injection, the greatest decrease usually occurring after 24 hours. Purpuric lesions usually developed when the number of blood platelets became less than 500,000 per c.mm. Regeneration of the platelets was accomplished by the 4th to the 9th day but there was an overregeneration and the return to normal did not take place until 2 weeks had elapsed. The red cells were also greatly reduced in number, but the rate of their destruction and regeneration was somewhat slower than that of the platelets. The leucocytes were slightly if at all influenced by the pneumococcus extract. Pneumococcus extracts were shown to be thrombolytic and hemolytic. Heat destroyed the activity of both the lysins in vitro. Heated extract produced purpura in mice but did not cause a severe anemia. Extracts adsorbed with either blood platelets or red blood cells showed a marked diminution in their thrombolytic and hemolytic activity in vitro. Such extracts, however, produced purpura as well as severe anemia and thrombopenia in mice.

scholarly journals Role of some members of chemokine/cytokine network in the pathogenesis of thalassemia and sickle cell hemoglobinopathies: a mini review

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Zahra Mousavi ◽  
Zinat Yazdani ◽  
Alireza Moradabadi ◽  
Fatemeh Hoseinpourkasgari ◽  
Gholamhossein Hassanshahi
Keyword(s):  
Endothelial Cells ◽  
Sickle Cell ◽  
Blood Cells ◽  
White Blood Cells ◽  
Cell Disease ◽  
Cytokine Network ◽  
Exact Role ◽  
Cytokines And Chemokines ◽  
Wide Range

Abstract The word of hemoglobinopathy is described for an array of disorders that affecting hemoglobin (Hb) functions. Hb is a molecule with 68 kDa molecular weight, serving as oxygen carrying metalloprotein. Hemoglobinopathy includes a wide range of Hb structural deficits varying from thalassemia to sickle cell disease. Cyto-chemokine network members are pivotally involved in the pathogenesis of hemoglobinopathies, however, the exact role of these mediators in the development of these disorders yet to be well addressed. Cytokines and chemokines are generated by inflamed endothelial cells that promote the expression of their respected receptors and further activate NF-κβ, recruit red blood cells (RBCs) and white blood cells (WBCs) toward the inflamed endothelium. Therefore, due to critical roles played by the cyto-chemokine network in several aspects of hemoglobinopathies pathophysiology including apoptosis of endothelial cells, RBC, WBC and etc.…, in the present review, we focused on the critical parts played by this network in the pathogenesis of hemoglobinopathies.

scholarly journals HISTOCHEMICAL DEMONSTRATION OF DEHYDROGENASE ACTIVITY IN THE CELLS OF NORMAL HUMAN BLOOD AND BONE MARROW

1960 ◽  
Vol 8 (1) ◽  
pp. 61-67 ◽  
Author(s):  
G. Adolph Ackerman
Keyword(s):  
Bone Marrow ◽  
Dehydrogenase Activity ◽  
Human Blood ◽  
Blood Platelets ◽  
Intracellular Localization ◽  
Succinic Dehydrogenase ◽  
Active Agent ◽  
Dehydrogenase Reaction ◽  
Normal Human ◽  
Normal Human Blood

Endogenous and succinic dehydrogenase activity was demonstrated in the living cells of normal human blood and bone marrow using a buffered nitro BT-succinate incubating solution. With this technique dehydrogenase activity was localized primarily in the granular leukocytes and the sites of enzymatic activity appeared to be non-mitochondrial. The addition of a non-ionic surface active agent to the incubating solution resulted in marked differences in the cellular and intracellular localization of dehydrogenase activity. With this method it was possible to demonstrate dehydrogenase activity in the mitochondria of most of the formed elements of the blood and bone marrow, including developing granulocytes and erythroid cells, agranulocytes, and blood platelets. Mature erythrocytes also exhibited a minimal dehydrogenase reaction with this procedure. This investigation indicated that in order adequately to demonstrate and evaluate dehydrogenase activity in the cells of the blood and bone marrow it was necessary to have increased cellular and mitochondrial permeability, as well as partially viable cells with an intact dehydrogenase system.

The Extramedullar Dissemination of Acute Myeloid Leukemic Cells Depends on CD31 (PECAM-1) and CD38 Coexpression Level.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 1896-1896 ◽  
Author(s):  
Olivier Herault ◽  
Nathalie Gallay ◽  
Jorge Domenech ◽  
Philippe Colombat ◽  
Christian Binet
Keyword(s):  
Blood Cells ◽  
De Novo ◽  
White Blood Cells ◽  
Transendothelial Migration ◽  
Expression Level ◽  
Leukemic Cells ◽  
P Value ◽  
Cd38 Expression ◽  
Wide Range ◽  
Wbc Count

Abstract The number of peripheral white blood cells (WBC) shows a wide range in acute myeloblastic leukemia (AML) patients. A high WBC count constitutes an adverse prognosis factor when at presentation and (myelo)monocytic subtypes were more frequently associated with extramedullar tumor sites. Marrow endothelial cells express CD31 and CD31/CD31 interaction is known to promote the migration in physiological mechanisms, as for example transendothelial migration of neutrophiles and monocytes in diapedesis. CD31 is a specific receptor of CD38 which is associated with numerous molecules on the surface of blood cells. Moreover, CD38 could interact with hyaluronate, a component of the extracellular matrix, 2 hyaluronate-binding sites having been reported in its extracellular domain. These elements lead us to postulate that CD31 and CD38 are colocalized on AML cells and that an excess of CD31 promotes the egress of the cells from the marrow compartment, while an excess of CD38 favors their anchorage to marrow microenvironment. The CD38/CD31 colocalization was demonstrated using FRET and cocapping strategies. FRET experiments were performed with a 488 nm laser flow cytometer, Cy3-conjugated anti-CD38 mAb and FITC-conjugated mAb against CD31. For cocapping experiments, we induced capping of CD31 with anti-CD31 mAb at 37°C; the cells were then fixed and labeled with anti-CD38 mAb. Transendothelial migration has been studied using anti-CD31 mAb and anti-CD38 blocking mAbs in Transwell® experiments performed with TrHBMEC cell line. To study the CD38/hyaluronate interaction, cells were treated or not with all-trans retinoic acid to induce CD38 overexpression just before plating the cells onto hyaluronate-coated dish. The in vivo influence of CD31 and CD38 coexpression level was evaluated by studying the phenotype of marrow leukemic cells (S/N ratio of the MFI) and the WBC count of 78 consecutive patients with newly diagnosed de novo AML. In all experiments, P value <0.05 has been considered as statistically significant. FITC-conjugated anti-CD31 induced increase in MFI of Cy-3 by 108.4% and we observed a CD31/CD38 cocapping. The inhibition of migration by anti-CD31 blocking mAb ranged from 2% to 66% of control and was correlated to the CD31 expression level (R=0.9236; P<0.0001), while migration in presence of anti-CD38 blocking mAb was about 80% of the control without correlation with CD38 expression level, suggesting a lesser role in the transendothelial migration process. The blasts exposed to ATRA exhibited a 1.3±0.1-fold increase in the CD38 expression (S/N of MFI) and a 40±10 % increase in adhesion to hyaluronate. The expression of CD31 and CD38 on the membrane of marrow leukemic cells of the AML patients were correlated (R=0.6621; P<0.0001). Moreover, peripheral WBC count was correlated with the CD31/CD38 ratio (R=0.5286; P=0.0129) and an excess of CD31 antigen was associated with an increased peripheral WBC count when comparing patients with ratio >1 to those with ratio <1 (P<0.0001). Interestingly, CD31/CD38 ratio was higher in AML (myelo)monocytic subtypes when comparing M4/M5 to all other FAB subtypes (1.2±0.1 and 0.7±0.1, respectively; P<0.0001). These findings suggest that extramedullar dissemination of AML cells depends on CD31 and CD38 coexpression level and give new insights into novel strategies to reduce the number of extramedullar tumor sites, notably in AML (myelo)monocytic subtypes.

scholarly journals THE HEMOCYTOLOGICAL CONSTITUTION OF ADULT MALE RABBITS FROM FIFTEEN STANDARD BREEDS

1936 ◽  
Vol 64 (3) ◽  
pp. 453-469 ◽  
Author(s):  
Albert E. Casey ◽  
Paul D. Rosahn ◽  
Ch'uan-K'uei Hu ◽  
Louise Pearce
Keyword(s):  
Standard Deviation ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Genetic Basis ◽  
Blood Platelets ◽  
White Blood Cells ◽  
Numerical Representation ◽  
Technical Errors ◽  
The Mean ◽  
Mean Variance

A study of the red blood cells, hemoglobin, blood platelets, and the total and individual white blood cells was made on 180 male rabbits of known age and representing fifteen standard breeds. An attempt was made to eliminate or bold constant such variables as age, sex, season, time of examination, technical errors, food, housing, and disease. The mean, variance of the mean, and standard deviation were calculated for each breed sample and for the group as a whole. An analysis of the variance showed that the variation between the breed samples was significantly greater than the variation within the breed samples for the red blood cells, hemoglobin, blood platelets, total white blood cells, basophiles, eosinophiles, and lymphocytes per cubic millimeter and in per cent and the neutrophiles in per cent. No significant variations were detected in the monocytes except when the breeds were divided into heavy and light breeds. No variation in the neutrophiles per cubic millimeter was detected; a large number of the breeds had exactly the same mean neutrophile level. Characteristic blood formulae were found for the various breed samples having an adequate numerical representation. It was concluded that the varying blood formulae could not be explained on any other, except an hereditary (genetic) basis.

scholarly journals Studies in the Respiration of Paramecium Caudatum

1948 ◽  
Vol 25 (2) ◽  
pp. 123-134
Author(s):  
BEVERLEY A. HUMPHREY ◽  
GEORGE F. HUMPHREY
Keyword(s):  
Methylene Blue ◽  
Oxygen Consumption ◽  
Oxygen Uptake ◽  
Succinic Dehydrogenase ◽  
Animal Tissue ◽  
Endogenous Respiration ◽  
Paramecium Caudatum ◽  
Directed Migration ◽  
A Value ◽  
Alkaline Side

1. A method is described for reducing the numbers of bacteria in a suspension of Paramecium caudatum by an electrically directed migration through a sterile column of liquid. The resulting suspension was suitable for metabolic experiments. 2. Details are given of a Cartesian diver respirometer of ‘macro’ dimensions; this apparatus has a precision of about 10%. 3. The effect of pH on the endogenous respiration of a homogenate of P. caudatum showed an optimum in the region 7.0-7.3, with a wide tolerance on the acid side of the optimum but low tolerance on the alkaline side. 4. The endogenous oxygen consumption had a value of 1.9µl. per 104 animals per hr. and was inhibited 60% by 0.01 M-cyanide and 40% by 0.01 M-azide. Methylene blue did not increase the endogenous oxygen uptake. 5. Succinic acid doubled the oxygen consumption, this increase being inhibited by malonate. Methylene blue increased oxygen consumption in the presence, of succinate still further, and also abolished the inhibition of this extra respiration by cyanide and azide. 6. It is concluded that P. caudatum resembles other animal tissue in possessing an active succinic dehydrogenase.

Sign in / Sign up

Export Citation Format

Share Document