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Stress-induced enhancement of activity of lymphocyte lysosomal enzymes in pigs of different stress-susceptibility

100%
Stojek W., Borman A., Glac W., Baracz-Jozwik B., Witek B., Kamyczek M., Tokarski J.
Journal of Physiology and Pharmacology. Supplement
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2006
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tom 57
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nr 8
61-72
To evaluate a possible mechanism of stress-induced lymphopenic effect we assessed the activity of lymphocyte lysosomal enzymes (LE) under immobilization. The effects of immobilization stress on LE (AP, acid phosphatase, cathepsin D and L, ß-N-acetyl-glucosamidase) activity in lymphocytes, number of lymphocytes and plasma cortisol (COR) level in the peripheral blood were examined in the cross-bred Pietrain pigs showing genotypic (presence or lack of RyR1 gene mutation) and phenotypic (reactivity to halothane) differences. It was found that immobilization stress evoked an increase in LE which was concomitant with lymphopenia and a rise of COR level. The most pronounced enhancement of LE, which may reflect a tendency to lymphocyte cytolysis, was found in the recessive homozygotes RyR1 (nn) phenotypically defined as stress/halothane susceptible as well as in the heterozygotes RyR1 (Nn) included in the group of stress/halothane resistant. Despite this individual variability the stress-induced increase in LE activity was present in all the animals. It seems that a possibility of destruction (lysis) of lymphocyte cells should not be excluded as one of the causes of stress lymphopenia.
2

Immobilization (restraint) stress in Desert sheep and goats, and the influence of pretreatment with xylazine or sodium betaine thereon

80%
Al-Qarawi A. A.
Polish Journal of Veterinary Sciences
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2005
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tom 08
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nr 1
3
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Response of hypothalamic oxytocinergic neurons to immobilization stress is not dependent on the presence of corticotrophin releasing hormone (CRH): a CRH knock-out mouse study

80%
Pirnik Z., Petrak J., Bundzikova J., Mravec B., Kvetnansky R., Kiss A.
Journal of Physiology and Pharmacology
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2009
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tom 60
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nr 2
77-82
This study explores the quantitative patterns of immunolabeled Fos protein incidence in the hypothalamic paraventricular (PVN) and supraoptic nuclei (SON) oxytocinergic (OXY) neurons in response to immobilization (IMO) stress in corticotrophin releasing hormone deficient (CRH-KO) mice. Adult male mice, taken directly from cages or 120 min after a single IMO, were sacrificed by intracardial perfusion with fixative. Coronal brain sections of 30 µm thickness were processed for dual Fos/OXY immunohistochemistry. In control wild type (WT) and CRH-KO mice, scattered Fos immunoreactivity was observed in hypothalamus, including the PVN where scanty Fos signal occurred in both parvocellular and magnocellular PVN subdivisions. Dual Fos/OXY immunostainings revealed higher basal Fos expression in the PVN of control CRH-KO mice. IMO evoked a marked rise in Fos expression in OXY neurons of the PVN and SON in both WT and CRH-KO groups of mice. The present data demonstrate that 1/ CRH deficiency upregulates the basal activity of hypothalamic PVN OXY cells in CRH-KO mice and 2/ IMO stress in both WT and CRH-KO mice affects distinctly the activity of OXY cells in both SON and PVN. Our data indicate that CRH deficiency does not alter the responsiveness of PVN and SON OXY cells to IMO stress.
4

Influence of stress on plasma levels of thyroxine, triiodothyronine, reverse-triiodothyronine, cortisol, prolactin, and cholesterol in pietrain and duroc pigs

61%
Rosochacki S. J., Sechman A., Piekarzewska A. B., Konecka A., Poloszynowicz J.
Acta Agraria et Silvestria. Series Zootechnica
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1998
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tom 36
41-64
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