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Asian Journal of Animal and Veterinary Advances
  Year: 2011 | Volume: 6 | Issue: 12 | Page No.: 1153-1169
DOI: 10.3923/ajava.2011.1153.1169
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The Role of Prolactin in Thermoregulation and Water Balance During Heat Stress in Domestic Ruminants

M. Alamer

Prolactin is a multi functional hormone that is believed to possess various diverse biological potencies than all other pituitary hormones combined. It is widely understood that prolactin is positively associated with ambient temperature that may indicate involvement of prolactin in an acclimatory responses to higher ambient temperature. The current review presented the evidences that indicate the possible modulatory role of prolactin in some thermoregulatory mechanisms during hot climates in domestic ruminants. The observed thermoregulatory failure with the suppression of prolactin response to heat exposure in ruminants suggests the modulation of prolactin of some thermoregulatory mechanisms. Down regulation in the expression of genes associated with prolactin signaling pathways in some target tissues which is induced by thermal exposure may be consistent with mechanisms to down-regulate some metabolic process directed to reduce heat increment. Evidence suggests that prolactin may affect body fluid regulation by maintaining extracelluar fluid volume during heat exposure and hence supporting heat dissipation. Prolactin may also control seasonal pelage growth cycle probably directed to facilitate heat loss during summer season. It can be concluded that higher circulating prolactin may modulate some thermoregulatory processes during heat exposure. This is likely to be associated with modulation of some mechanisms of heat dissipation and heat production oriented to support homeothemy.
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  •    Heat Stress and Dairy Cow: Impact on Both Milk Yield and Composition
  •    Polymorphism of Prolactin Receptor Gene and its Association with Egg Production Traits in Erlang Mountainous Chicken
  •    Effects of Haemorrhage on Thermoregulation, Heart Rate and Blood Constituents in Goats (Capra hircus)
  •    The Relation between Biological Consequences and High Temperature in Mammals
  •    Effects of Solar Radiation on Thermophysiological and Growth Parameters of Indigenous Black Bedwin Goat Kids in Southern Jordan
  •    Seasonal Changes in Gonadotropins, Prolactin and Sex Steroid Hormones in Captive Hill Mynah Gracula religiosa
  •    Thermoregulation and Reproductive Performance of Grazing Desert Ewes (Ovis aries) as Influenced by Concentrate Supplementation
How to cite this article:

M. Alamer , 2011. The Role of Prolactin in Thermoregulation and Water Balance During Heat Stress in Domestic Ruminants. Asian Journal of Animal and Veterinary Advances, 6: 1153-1169.

DOI: 10.3923/ajava.2011.1153.1169






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