Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

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    STUDIA BIOLOGIA - Ediţia nr.2 din 2005  
         
  Articol:   MODIFICĂRI STRUCTURALE ŞI ULTRASTRUCTURALE PRODUSE ÎN GLANDELE SUPRARENALE DUPĂ ADMINISTRAREA EXPERIMENTALĂ A VENINULUI DE ALBINE (APIS MELLIFERA L.) II. GLANDELE MEDULOSUPRARENALE.

Autori:  ADRIAN FLOREA, CONSTANTIN CRĂCIUN, CONSTANTIN PUICĂ. 		 
       
         
  Rezumat:  Structural and Ultrastructural Changes Produced in Adrenal Glands Consequently to the Honey Bee Venom Experimental Administration. II. The Adrenal Medula. An important aspect of the organism reaction to stressors involves the sympathoadrenal system, with the release of catecholamines from the adrenomedullary chromaffin cells. We reported here the histological and ultrastructural aspects of the epinephrine-secreting cells from adrenal medulla after the honey bee (Apis mellifera L.) venom subchronic treatment. We found hypertrophyc cells, and dilatation of capillaries on the background of the hypertrophy of the entire gland. At ultrastructural level, a high number of mature secretion granules was emphasized, as well as numerous immature granules widespread in the cytoplasm. Nuclei have an irregular shape, prominent nucleoli, and a very dilated perinuclear space. The endoplasmic reticulum and Golgi apparatus are also dilated. Small necrosis areas were observed besides capillaries with a compromised endothelium. All these changes prove that the bee venom is a powerful stressor agent generating an important reaction of the chromaffin cells. These cells have a general aspect characteristic to prolonged stress conditions, but they still keep an increased secretory activity. However, the high number of immature granules suggest an imminent physiological depletion of this gland..  
         
     
         
         
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