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Related Experiment Videos

[Somatotropin: endocrinological aspects].

G J Suurd1, A J van Dijk, G M van der Burgt

  • 1Vakgroep Bedrijfsdiergeneeskunde en Voortplanting, Faculteit Diergeneeskunde, Rijksuniversiteit Utrecht.

Tijdschrift Voor Diergeneeskunde
|September 15, 1988
PubMed
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Bovine somatotropin (BST) regulates milk production, with effects dependent on plasma concentration. Optimal administration timing, after 90 days of lactation, is crucial for positive outcomes.

Area of Science:

  • Endocrinology
  • Animal Science
  • Biotechnology

Background:

  • Bovine somatotropin (BST) is a pituitary hormone regulating growth and metabolism.
  • Its secretion is controlled by hypothalamic hormones like Growth Hormone Releasing Factor (GRF) and Somatotropin Release Inhibiting Factor (SRIF).
  • BST mediates its effects indirectly via somatomedins synthesized in hepatocytes, with receptors found in mammary tissue.

Purpose of the Study:

  • To elucidate the regulatory mechanisms and physiological effects of Bovine Somatotropin.
  • To determine optimal administration strategies for BST in dairy cattle.
  • To explore future applications of recombinant BST.

Main Methods:

  • Review of existing literature on BST physiology and endocrinology.

Related Experiment Videos

  • Analysis of factors influencing BST release and action.
  • Evaluation of BST administration timing and its impact on milk production.

    • Main Results:

    • BST release is pulsatile, influenced by steroids, genetics, nutrition, and pregnancy.
    • The efficacy of BST depends on average plasma concentration, not secretion patterns.
    • Administration post-peak lactation, specifically after day 90, yields positive and consistent results.

    Conclusions:

    • BST plays a significant role in regulating bovine physiology, particularly milk yield.
    • Strategic administration of BST, considering lactation stage, is key for maximizing benefits.
    • Future advancements include slow-release recombinant BST preparations for sustained efficacy.