scholarly journals DISTRIBUTION OF ACID PHOSPHATASE, β-GLUCURONIDASE AND N-ACETYL-β-GLUCOSAMINIDASE ACTIVITIES IN LYMPHOCYTES OF LYMPHATIC TISSUES OF MAN AND RODENTS

1969 ◽  
Vol 17 (4) ◽  
pp. 238-243 ◽  
Author(s):  
NORIKAZU TAMAOKI ◽  
EDWARD ESSNER
Keyword(s):  
Lymph Node ◽  
Acid Phosphatase ◽  
Acid Phosphatase Activity ◽  
Germinal Centers ◽  
White Pulp ◽  
Lymphatic Tissue ◽  
Glucuronidase Activity ◽  
Splenic White Pulp ◽  
Cryostat Sections ◽  
Formalin Fixed

Acid phosphatase, β-glucuronidase and N-acetyl-β-glucosaminidase activities were demonstrated in lymphocytes of man and various rodents using formalin-fixed cryostat sections. Lymphocytes were heterogeneous in respect to the activity of these enzymes, depending on the location of cells in the lymphatic tissues. Acid phosphatase activity was demonstrable in lymphocytes located in the diffuse lymphatic tissue of the cortex of the lymph node and around the central arteriole of the splenic white pulp of all species studied. In man and in rat, the majority of lymphocytes in these areas also showed β-glucuronidase activity whereas, in the mouse, none had β-glucuronidase but many had N-acetyl-β-glucosaminidase activity. Most of the lymphocytes in the mantle of the germinal centers and in the lymphatic nodules of the splenic white pulp were negative for all three enzymes studied. The thymic lymphocytes were positive for acid phosphatase, but usually negative for β-glucuronidase and N-acetyl-β-glucosaminidase. The possible significance of these differences is discussed.

scholarly journals Fc chimeric protein containing the cysteine-rich domain of the murine mannose receptor binds to macrophages from splenic marginal zone and lymph node subcapsular sinus and to germinal centers.

1996 ◽  
Vol 184 (5) ◽  
pp. 1927-1937 ◽  
Author(s):  
L Martínez-Pomares ◽  
M Kosco-Vilbois ◽  
E Darley ◽  
P Tree ◽  
S Herren ◽  
...  
Keyword(s):  
Lymph Node ◽  
Lymph Nodes ◽  
B Cell ◽  
Marginal Zone ◽  
Chimeric Protein ◽  
Mannose Receptor ◽  
Germinal Centers ◽  
White Pulp ◽  
Subcapsular Sinus ◽  
Splenic White Pulp

Ligands for the cysteine-rich (CR) domain of the mannose receptor (MR) were detected by incubating murine tissues with a chimeric protein containing CR fused to the Fc region of human IgG1 (CR-Fc). In naive mice, CR-Fc bound to sialoadhesin+, F4/80low/-, macrosialin+ macrophages (M phi) in spleen marginal zone (metallophilic M phi) and lymph node subcapsular sinus. Labeling was also observed in B cell areas of splenic white pulp. Western blotting analysis of spleen and lymph nodes lysates revealed a restricted number of molecules that interacted specifically with CR-Fc. In immunized mice, labeling was upregulated on germinal centers in splenic white pulp and follicular areas of lymph nodes. Kinetic analysis of the pattern of CR-Fc labeling in lymph nodes during a secondary immune response to ovalbumin showed that CR ligand expression migrated towards B cell areas, associated with cells displaying distinctive dendritic morphology, and accumulated in developing germinal centers. These studies suggest that MR+ cells or MR-carbohydrate-containing antigen complexes could be directed towards areas where humoral immune responses take place, through the interaction of the MR CR domain with molecules expressed in specialized macrophage populations and antigen transporting cells.

Pituitary adrenal interactions in shorn sheep exposed to cold, wet conditions

1969 ◽  
Vol 20 (1) ◽  
pp. 99 ◽  
Author(s):  
BA Panaretto ◽  
KA Ferguson
Keyword(s):  
Acid Phosphatase ◽  
Enzymatic Activity ◽  
Phosphatase Activity ◽  
Cold Exposure ◽  
Acid Phosphatase Activity ◽  
Adrenal Glands ◽  
Adrenocortical Insufficiency ◽  
Acth Stimulation ◽  
Glucuronidase Activity ◽  
Exposure Levels

Newly shorn sheep were exposed to a cold (3°C) wet environment for 8 days; six out of 10 untreated animals died but there were no deaths in a group of 10 that was treated with cortisone. In two other experiments, nine out of 15 control sheep died, but only four out of 15 sheep treated with adrenocorticotrophin (ACTH). In a final experiment approximately one-third of exposed controls died compared with one-tenth of sheep treated with dexamethasone trimethylacetate. A significantly greater proportion (P < 0.05) of sheep given ACTH or 1.5 mg or more of dexamethasone trimethylacetate per kg had rectal temperatures higher than 37.8°C during the first 96 hr of exposure than the comparable controls. The adrenal glands of sheep that died in the cortisone and ACTH experiments were heavier than those taken from survivors that were killed after the experiment; macroscopically, the cortices of some of the adrenals from sheep that succumbed were haemorrhagic and resembled the glands seen in the Waterhouse-Friderichsen syndrome in man; all were heavily infiltrated with lipid when compared with the cortices of survivors. ß-Glucuronidase activity in the serum of cortisone-treated sheep (and in untreated survivors) was elevated during the first 2–3 days of exposure and returned to pre-exposure levels; untreated sheep that succumbed showed continuously increasing enzymatic activity. Acid phosphatase activity was initially depressed in steroid-treated sheep and returned to pre-exposure levels, whereas activity increased continuously in controls that died. Total leucocytes were lower during the first 72 hr of exposure in sheep treated with 1.5–2 mg dexamethasone trimethylacetate per kg, compared with untreated controls. We suggest that the enlarged, fat-laden haemorrhagic adrenals found in sheep that died from cold exposure resulted from excessive ACTH stimulation prior to death. The results suggested a state of adrenocortical insufficiency during the first 96 hr of cold exposure.

Lymphatic tissue changes in rats flown on Spacelab Life Sciences-2

1996 ◽  
Vol 81 (1) ◽  
pp. 172-177 ◽  
Author(s):  
C. C. Congdon ◽  
Z. Allebban ◽  
L. A. Gibson ◽  
A. Kaplansky ◽  
K. M. Strickland ◽  
...  
Keyword(s):  
Lymph Node ◽  
Inguinal Lymph Node ◽  
Life Sciences ◽  
White Pulp ◽  
Macrophage Activity ◽  
Tissue Sections ◽  
Gravitational Stress ◽  
Dna Strands ◽  
Splenic White Pulp ◽  
Tissue Changes

Thymus, spleen, inguinal lymph node, and bone marrow specimens from rats flown on the 14-day Spacelab Life Sciences-2 mission were examined after staining of tissue sections. The primary observation was a transient retrogressive change in lymphatic tissues in the rats within a few hours after landing. There was a diffuse increase in tingible body-containing macrophages in the cortex of the thymus, thymus-dependent areas of the splenic white pulp, and inguinal lymph node. This was not observed 9 days after recovery. The in situ labeling of fragmented DNA strands catalyzed by exogenous terminal deoxynucleotidyltransferase (TdT) with ApopTag reagents (Oncor, Gaithersburg, MD) inside the tingible body-containing macrophages indicated that the process was one of apoptosis. No increase in tingible body macrophage activity was noted in thymus and spleen tissue obtained from rats in flight on flight day 13. The reaction to gravitational stress from readaptation to 1 G is the most likely explanation of the transient retrogressive change in lymphatic tissues.

scholarly journals ROLE OF THE THYMUS IN IMMUNE REACTIONS IN RATS

1962 ◽  
Vol 116 (2) ◽  
pp. 187-206 ◽  
Author(s):  
Byron H. Waksman ◽  
Barry G. Arnason ◽  
Branislav D. Janković
Keyword(s):  
Lymph Nodes ◽  
Plasma Cells ◽  
Germinal Centers ◽  
White Pulp ◽  
Size Number ◽  
Splenic White Pulp ◽  
Spleen And Lymph Nodes ◽  
Lymphoid Nodules ◽  
Lymphatic Organs

In rats thymectomized at birth, there was a profound depletion of small lymphocytes in various lymphatic organs. In the spleen, these cells were completely lacking from the Malpighian bodies and splenic white pulp. Empty reticular structures remained surrounding the white pulp arterioles. In the lymph nodes, large masses and nodules of small lymphocytes (primary lymphoid nodules) were either markedly depleted or absent, as were the zones of these cells normally surrounding germinal centers. In both spleen and nodes, germinal centers appeared normal in size, number, and cellular make-up; and plasma cells were found in normal or even increased number in their customary position. Rats which in spite of thymectomy developed intense Arthus or delayed reactivity showed incomplete depletion of the lymphoid tissue. It is concluded that small lymphocytes of the spleen and lymph nodes may come, in large part, directly from the thymus and are not derived from medium and large lymphocytes of the germinal centers. It is suggested that there may be a second population of small lymphocytes whose function is unrelated to the thymus lymphocytes.

Erythrophagocytosis in the Liver in Hemolytic Anemias

1968 ◽  
Vol 26 ◽  
pp. 184-185
Author(s):  
O. T. Minick ◽  
E. Orfei ◽  
F. Volini ◽  
G. Kent
Keyword(s):  
Acid Phosphatase ◽  
Oxidative Damage ◽  
Phosphatase Activity ◽  
Kupffer Cells ◽  
Acid Phosphatase Activity ◽  
Common Type ◽  
Red Cell ◽  
Cell Fragments ◽  
Reticulo Endothelial System ◽  
Important Site

Hemolytic anemias were produced in rats by administering phenylhydrazine or anti-erythrocytic (rooster) serum, the latter having agglutinin and hemolysin titers exceeding 1:1000.Following administration of phenylhydrazine, the erythrocytes undergo oxidative damage and are removed from the circulation by the cells of the reticulo-endothelial system, predominantly by the spleen. With increasing dosage or if animals are splenectomized, the Kupffer cells become an important site of sequestration and are greatly hypertrophied. Whole red cells are the most common type engulfed; they are broken down in digestive vacuoles, as shown by the presence of acid phosphatase activity (Fig. 1). Heinz body material and membranes persist longer than native hemoglobin. With larger doses of phenylhydrazine, erythrocytes undergo intravascular fragmentation, and the particles phagocytized are now mainly red cell fragments of varying sizes (Fig. 2).

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