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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Dexamethasone-induced apoptosis in immune cells from peripheral circulation and lymphomyeloid tissues of juvenile clearnose skates, Raja eglanteria.

Juvenile clearnose skates (Raja eglanteria) were injected intramuscularly with dexamethasone-21-phosphate at 50, 75, and 100mg/kg body weight. After 24h, skates were sacrificed and lymphomyeloid tissues (thymus, spleen, Leydig organ, and epigonal organ) were removed and whole blood was sampled. Tissues were used fresh for imprints or prepared for histology by solvent fixation or freezing in liquid nitrogen. Apoptosis in fixed tissues was assessed by transmission electron microscopy. Frozen sections and cytospin preparations of peripheral blood leukocytes (PBL) were evaluated by the TUNEL reaction to detect DNA strand breaks. Dexamethasone treatment increased apoptotic activity in all lymphomyeloid tissues as well as in PBL. These studies demonstrate that immune cells of elasmobranchs have the capacity for glucocorticoid-driven apoptosis, and that programmed cell death as a mechanism to regulate immune cell production appears to have been conserved during vertebrate evolution.[1]

References

  1. Dexamethasone-induced apoptosis in immune cells from peripheral circulation and lymphomyeloid tissues of juvenile clearnose skates, Raja eglanteria. Walsh, C.J., Wyffels, J.T., Bodine, A.B., Luer, C.A. Dev. Comp. Immunol. (2002) [Pubmed]
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