Role of Prolactin, Growth Hormone, Insulin-like Growth Factor I and Cortisol in Teleost Osmoregulation $ + 0 ) 2 6 -4

نویسندگان

  • Grace Pickford
  • Juan Miguel Mancera
  • Stephen D. McCormick
چکیده

Maintenance of constant cellular ion concentrations is a basic requirement of all life forms. The strategy evolved by teleost fish to achieve this requirement is by maintaining nearly constant levels of extracellular ions at approximately one-third the ionic strength of seawater (SW). In freshwater (FW), teleosts must counteract the passive loss of ions and gain of water by actively taking up ions (primarily through the gills), and removing excess water by excreting a dilute urine. In SW, teleosts

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The Review of the Effect of Growth Hormone on Immune System, Metabolism and Osmoregulation of Fish

The aim of the present review is to summarize the knowledge on the neuroendocrine control of Growth hormone (GH). The biological actions of growth hormone are pleiotropic, including growth promotion, energy mobilization, gonadal development, appetite, social behavior, osmoregulation and control of immune system. Accordingly, the regulatory network for GH is complex and includes many endocrine a...

متن کامل

Endocrine Control of Osmoregulation in Teleost Fish1

SYNOPSIS. As the primary link between environmental change and physiological response, the neuroendocrine system is a critical part of osmoregulatory adaptations. Cortisol has been viewed as ‘the’ seawater-adapting hormone in fish and prolactin as ‘the’ fresh water adapting hormone. Recent evidence indicates that the growth hormone/insulin-like growth factor I axis is also important in seawater...

متن کامل

Prolactin and growth hormone in fish osmoregulation.

Prolactin is an important regulator of multiple biological functions in vertebrates, and has been viewed as essential to ion uptake as well as reduction in ion and water permeability of osmoregulatory surfaces in freshwater and euryhaline fish. Prolactin-releasing peptide seems to stimulate prolactin expression in the pituitary and peripheral organs during freshwater adaptation. Growth hormone,...

متن کامل

Osmoregulatory actions of the GH/IGF axis in non-salmonid teleosts

Salmonid fishes provided the first findings on the influence of the growth hormone (GH)/insulin-like growth factor I (IGF-I) axis on osmoregulation in teleost fishes. Recent studies on non-salmonid species, however, indicate that this physiological action of the GH/IGF-I axis is not restricted to salmonids or anadromous fishes. GH-producing cells in the pituitary of fish acclimated to different...

متن کامل

Evaluation of the relationship between serum levels of insulin, cortisol and growth hormones and wound healing in normal and diabetic rats

Introduction: Several factors such as diseases, medications and humoral agents can delay or speed up wound healing process. Because of the limited information about the hormonal changes during wound healing, in this study the relationship between serum levels of growth hormone, insulin and cortisol and wound healing in normal and diabetic rats was evaluated. Methods: Male Wistar rats )weigh...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006