کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8987776 | 1555133 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Serum immunoglobulin G concentration in Southern elephant seal, Mirounga leonina (Linnaeus, 1758), from Elephant island (Antarctica): Sexual and adrenal steroid hormones effects
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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چکیده انگلیسی
Serum immunoglobulin G (IgG; indirect enzyme-linked immunosorbent assay), as well as sexual and adrenal steroid hormones' concentrations (radioimmunoassay) were determined in 63 (male and female) Southern elephant seals (Mirounga leonine) at different developmental stages (weaned pups, juveniles and adults). In females, IgG values (mean ± S.D.) were higher (P < 0.05) in adults (15.9 ± 6.5 mg mlâ1) than in juveniles (7.9 ± 4.0 mg mlâ1), but similar to weaned pups (12.0 ± 5.0 mg mlâ1). Estrogen concentration was higher (P < 0.05) in adults than in the weaned pups. In females, a significant (P < 0.05) correlation (R = 0.4) between serum IgG level and progesterone concentration was observed. In males, testosterone concentration was higher (P < 0.05) in adults than in the juveniles and weaned pups. Aldosterone and cortisol concentrations were higher (P < 0.05) in weaned pups (1056.0 ± 643.1 pmol lâ1 and 272.7 ± 110.0 nmol lâ1, respectively) than in the juveniles (638.6 ± 579.7 pmol lâ1 and 152.9 ± 97.3 nmol lâ1, respectively) and adults (386.5 ± 209.1 pmol lâ1 and 145.7 ± 67.3 nmol lâ1, respectively). These findings indicate that weaned pups are subjected to a higher natural stressful condition in the field. Despite this, humoral immunity, measured through IgG concentration, is not impaired in weaned pups.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Veterinary Immunology and Immunopathology - Volume 106, Issues 3â4, 15 July 2005, Pages 239-245
Journal: Veterinary Immunology and Immunopathology - Volume 106, Issues 3â4, 15 July 2005, Pages 239-245
نویسندگان
Ana P.S. Ferreira, Pablo E. MartÃnez, Elton P. Colares, Ricardo B. Robaldo, Maria E.A. Berne, Kleber C. Miranda Filho, Adalto Bianchini,