Abstract:
:Immunoglobulin M (IgM) is known as a main factor in the humoral immune system of teleosts. In the present study, the effect of cortisol on plasma IgM concentrations was investigated using a specific antibody to IgM in masu salmon (Oncorhynchus masou). Cortisol was orally administered each day for 2 weeks at a dose of 1 mg g(-1) in the diet, and for the following week the fish were fed a non-treated diet. Blood plasma samples were collected at 0, 1, 2 and 3 weeks after the initiation of treatment. Oral administration of cortisol elevated plasma cortisol concentrations to about 40 ng/ml for 2 weeks after administration and slightly reduced plasma IgM concentration; the suppression was statistically significant one week after the period of hormone administration. However, treatment with cortisol did not affect plasma concentrations of total protein or α1-protein, one of the major serum proteins, during the experimental period. These results indicate that cortisol specifically suppresses plasma IgM concentrations.
journal_name
Fish Physiol Biochemjournal_title
Fish physiology and biochemistryauthors
Nagae M,Fuda H,Ura K,Kawamura H,Adachi S,Hara A,Yamauchi Kdoi
10.1007/BF00004118subject
Has Abstractpub_date
1994-05-01 00:00:00pages
41-8issue
1eissn
0920-1742issn
1573-5168journal_volume
13pub_type
杂志文章abstract::The effects of acclimation temperature (15, 20, 25 °C) on routine oxygen consumption and post-exercise maximal oxygen consumption rates (MO2) were measured in juvenile shortnose sturgeon (Acipenser brevirostrum LeSueur, 1818). The routine MO2 of shortnose sturgeon increased significantly from 126.75 mg O2 h-1 kg-1 at ...
journal_title:Fish physiology and biochemistry
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journal_title:Fish physiology and biochemistry
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journal_title:Fish physiology and biochemistry
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journal_title:Fish physiology and biochemistry
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