scholarly journals Stimuli from Conspecifics Influence Brain Mast Cell Population in Male Rats

2002 ◽  
Vol 42 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Lori Asarian ◽  
Eleazer Yousefzadeh ◽  
Ann-Judith Silverman ◽  
Rae Silver
Keyword(s):  
Mast Cell ◽  
Cell Population ◽  
Male Rats ◽  
Mast Cell Population

Dietary Copper Deficiency Increases the Mast Cell Population of the Rat

1994 ◽  
Vol 207 (3) ◽  
pp. 274-277 ◽  
Author(s):  
D. A. Schuschke ◽  
J. T. Saari ◽  
C. A. West ◽  
F. N. Miller
Keyword(s):  
Mast Cell ◽  
Cell Population ◽  
Copper Deficiency ◽  
Dietary Copper ◽  
Mast Cell Population

Cerebral vasospasm: presence of mast cells in human cerebral arteries after aneurysm rupture

1981 ◽  
Vol 54 (6) ◽  
pp. 733-735 ◽  
Author(s):  
Luiz C. M. Faleiro ◽  
Conceição R. S. Machado ◽  
Amado Gripp ◽  
Rubens A. Resende ◽  
Pedro A. Rodrigues
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Cell Population ◽  
Hydrolytic Enzymes ◽  
Aneurysm Rupture ◽  
Blue Staining ◽  
Control Group ◽  
Preliminary Note ◽  
Muscular Layer ◽  
Mast Cell Population

✓ Mast cells contain heparin, histamine, hydrolytic enzymes, and possibly serotonin in metachromatic cytoplasmic granules, and are not visualized in routine histological preparations. Special fixation, frozen sections, and toluidine blue staining are essential for counting the number of mast cells in tissue sections. Histological preparations for counting mast cells were made from arteries of the circle of Willis in persons who died after chest or abdominal trauma (control group) and in patients who had subarachnoid hemorrhage (SAH) after aneurysm rupture. The arteries were removed within 6 hours of death, taking care to avoid damage to their structure, and were immersed in the fixative solution. This preliminary note, reporting findings in only a few cases, is justified by the interesting discovery of a marked increase in mast cell population in the muscular layer of arteries after SAH. The series is small because of the difficulty in obtaining suitable material, since mast cells virtually disappear when autopsy is performed later than 6 hours after death. It is concluded from this study that there is an increase of mast cell population in cerebral arterial walls after SAH, mainly in the muscular layer, and that the number of mast cells is higher in arteries closer to the aneurysm.

scholarly journals Tryptase Profile of the Rat Skin Mast Cell Population During the Wound Healing

2021 ◽  
Vol 9 (4) ◽  
pp. 84-89
Author(s):  
V. V. Shishkina ◽  
S. V. Klochkova ◽  
N. T. Alexeeva ◽  
M. Yu. Soboleva ◽  
D. I. Esaulenko ◽  
...  
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Cell Population ◽  
Biological Activities ◽  
Repair Process ◽  
Fiber Formation ◽  
Control Group ◽  
Rat Skin ◽  
Wide Range ◽  
Mast Cell Population

Mast cells cyclically synthesize and excrete a wide range of biogenesis products with different biological activities into the extracellular matrix and are regulators of local homeostasis both in normal conditions and in pathology – inflammation, oncogenesis, etc. The relative specificity of classical histochemical methods for detecting mast cells in relation to chromogenic to substrates causes certain difficulties in the selective study of the components of the secretome of mast cells, for example, heparin, histamine, chymase or tryptase. Therefore, immunomorphological techniques have become very popular, which identify specific substrates and allow differentiation of the components of the mast cell secretome. Mediators produced by mast cells promote neoangiogenesis, fibrillogenesis and re-epithelialization during the repair process.The aim of our work was to study the tryptase profile of the mast cell population of rat skin during the wound processusing an original combined method of immunohistochemical staining.Material and methods. The experiment involved 12 Wistar rats divided into two groups – intact (n=6) and with the existing wound process of the skin in the withers (n=6). The tryptase profile of mast cells was assessed on the 7th day of the wound process in comparison with the control group.Results. The results obtained showed a significant increase in the number of tryptase-positive mast cells on the 7th day of the wound process in the skin against the background of a general increase in the population of mast cells. Intragranular tryptase reserve was significantly increased. In contrast to the control, where mast cells with single tryptase-positive granules dominated, during the wound process, cells of this type were practically not detected in the skin (43.69±2.9% and 8.55±0.9%). The content of tryptase-positive mast cells with complete filling of the cytoplasm in the control group and the group of animals with a wound process was 14.24±1.2% and 38.03±2.9%, respectively.Conclusion. Thus, when modeling a wound, an increase in tryptase synthesis is detected both in individual MCs and within the entire MC population. This fact indicates that mast cell proteases can become a potential therapeutic target for improving wound regeneration by correcting immunogenesis, inflammation and fiber formation.

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