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    Effects of trauma and pain on the acute anterior pituitary hormonal response
    (Elsevier, 2002) Gözil, R.; Evrenkaya, T.; Keskil, Z.; Çalgüner, E.; Keskil, S.
    The aim of this study was to compare the effects of trauma and pain on the pituitary gland so as to determine whether pain is a significant component in the general acute hormonal trauma response. Adenohypophysis of rabbits that have undergone either diffuse traumatic brain injury or pain were investigated using immunohistochemistry. The ACTH staining pattern of the pain-administered rabbits was not as strong as the head-trauma-administered group, whereas PRL staining pattern of the former group was not so weak as the later group. As a conclusion, since adrenocorticotrophic hormone and prolactin staining patterns were different in the trauma administered and pain induced groups; it may be postulated that pain alone may not be an important factor in the hormonal response to trauma. © 2002 Published by Elsevier Science Ltd.
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    Effects of vasoconstriction on the acute anterior pituitary hormonal response to head injury
    (Churchill Livingstone, 2002) Keskil, Z.; Evrenkaya, T.; Gozil, R.; Calguner, E.; Keskil, S.
    Since cerebral vasoconstriction alone may impair the hypothalamic and pituitary circulation, we planned to investigate whether the hormonal response to the vasoconstriction that may be induced by the head injury is a significant component of the general acute hormonal response to head injury. Although diffuse adrenocorticotropic hormone immunohistochemical staining of the adenohypophysis of rabbits was observed in the head trauma administered group, only mild positive staining was present in the Endothelin-1 administered group. However, decreased prolactin staining was found in both of the groups. It is postulated that trauma induced vasoconstriction may not be an important manipulating factor in the corticotrophic hormone response to injury, while it may be responsible for the decreased prolactin response. (C) 2002 Elsevier Science Ltd. All rights reserved.