The reaction of leukocytes of sterlet Acipenser ruthenus to hormone-induced stress

Cytomorphological and biochemical characteristics of the whitefish, Baikal omul Coregonus migratorius, infected by plerocercoids of Diphyllobothrium dendriticum (Cestoda: Pseudophyllidae)

“…These hematologi cal transformations may evidence stress hormones participating here, particularly cortisol and epineph rine. The long duration migrations and starvation of the fish launch the synthesis of the corticosteroid hor mones (McConnachie et al, 2012), followed by desta bilization of leukopoiesis and suppression of the cell and humoral immune factors (Golovina and Trom bitskii, 1989;Barton and Iwama, 1991;Mikryakov et al, 2009). Similar results were obtained in laboratory experiments with carp, when long lasting starvation led to th leukopenia, lymphopenia, and neutrophilia (Sopinska, 1984).…”

“…For this reason the absence of basophils and the low number of monocytes in the blood of the fish infected D. dendriticum may be explained by their pos sible migrations to the inflammation center. It is also known that basophilopenia in the blood and the decrease of cytokine synthesis (activation of macroph ages) may be caused by some sex hormones and stress hormones (corticosteroids) (Lebedev and Ponyakina, 2003;Mikryakov, 2004;Mikryakov et al, 2009); ele vated levels of these hormones are typical of spawning fish (McConnachie et al, 2012). Single eosinophils have been registered in the Baikal omul infected by D. dendriticum, but they were represented only by mature cells.…”

“…Regard must be paid to the blood parameters that indicate changes in both the immune system and the hormone status, including the stress limitation (Golovina and Trombitskii, 1989;Davis et al, 2008;Mikryakov et al, 2009). The dysfunction of the hemopoiesis in the Baikal omul infected by D. den driticum during spawning migration, particularly, the shifts in erythropoiesis, lymphopoiesis, and granulo cytepoiesis and the dysfunction of hemoglobin syn thesis and total protein synthesis were signs of the reaction of the organism to stress.…”

Effect of probiotics on the leucogram of african sharptooth catfish in the conditions of industrial aquacultures

“…Наиболее крупными клетками лейкоцитарного ряда являются моноциты, для них характерна вакуолизированная цитоплазма без зернистости, в которую погружено бобовидное ядро, всегда смещенное относительно центра клетки [13].…”

Comparative Analysis of the Effect of Hormone-Induced Stress on Hemostasis in the Cyprinus Carpio and the Oreochromis Niloticus

“…In biological practice, imitation of the stress of different duration by administration of exogenous cortisol is widely used (Espelid et al, 1996;Pickering and Pottinger, 1989;Van Weerdand Komen, 1998;Vijayan et al, 1997), cortisone (Mikryakov et al, 2009;Mikryakov and Mikryakov, 2002;Mikryakov and Mikryakov and Mikryakov, 2005;Mikryakov et al, 2007;Roth, 1972), or synthetic corticosteroids dexamethasone (Balabanova et al, 2009;Mikryakov, 2004; D. V. Mikryakov et al, 2007), triamcinolone (Houghton and Matthews, 1986;Houghton and Matthews, 1990;Wechsler et al, 1986), deoxycorticosterone (Mikryakov, 2004), betamethasone (Swift, 1982). Mainly, these are experiments devoted to studying the immunological function of fish blood, and all works in some way noted the suppressive effect of such hormonal treatments.…”