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The rumen and potassium homeostasis: a model
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Department of Veterinary Physiology, Free University of Berlin, Oertzenweg 19b, D-14163 Berlin, Germany
CORRESPONDING AUTHOR
F. Stumpff   

Department of Veterinary Physiology, Free University of Berlin, Oertzenweg 19b, D-14163 Berlin, Germany
Publication date: 2007-09-17
 
J. Anim. Feed Sci. 2007;16(Suppl. 2):436–441
 
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ABSTRACT
The ruminant has to be able to regulate potassium metabolism over an extremely wide range of intake. When related to body weight, dietary potassium intake of ruminants frequently exceeds that of humans by a factor of over ten, and experimental situations suggest that the toxic threshold for ingestion of potassium is considerably higher. While a number of studies have addressed the outstanding ability of the ruminant kidney to extrude potassium, the role of the rumen in maintaining potassium homeostasis in sheep and cows by serving as a reservoir for the redistribution of potassium has received considerably less attention. Based on current and past studies at the level of the cell, the tissue and the animal, we present a model for the regulation of ruminal transport that may help in the understanding of the variable responses of the rumen epithelium to dietary potassium intake, and the role of magnesium in mediating these responses.
 
CITATIONS (8):
1.
Transport of cations and anions across forestomach epithelia: conclusions from in vitro studies
S. Leonhard-Marek, F. Stumpff, H. Martens
animal
 
2.
Na+transport across rumen epithelium of hay-fed sheep is acutely stimulated by the peptide IGF-1in vitro
Zanming Shen, Holger Martens, Monika Schweigel-Röntgen
Experimental Physiology
 
3.
Calcium and Magnesium Physiology and Nutrition in Relation to the Prevention of Milk Fever and Tetany (Dietary Management of Macrominerals in Preventing Disease)
Javier Martín-Tereso, Holger Martens
Veterinary Clinics of North America: Food Animal Practice
 
4.
Cultured ruminal epithelial cells express a large-conductance channel permeable to chloride, bicarbonate, and acetate
Friederike Stumpff, Holger Martens, Sabine Bilk, Jörg R. Aschenbach, Gotthold Gäbel
Pflügers Archiv - European Journal of Physiology
 
5.
Magnesium homeostasis in cattle: absorption and excretion
Holger Martens, Sabine Leonhard-Marek, Monika Röntgen, Friederike Stumpff
Nutrition Research Reviews
 
6.
A comparative study of ammonia transport across ruminal epithelia from Bos indicus crossbreds versus Bos taurus
Imtiaz Rabbani, Hannah-Sophie Braun, Tasneem Akhtar, Franziska Liebe, Julia Rosendahl, Martin Grunau, Uwe Tietjen, Saima Masood, Sabine Kaessmeyer, Dorothee Günzel, Habib Rehman, Friederike Stumpff
Animal Science Journal
 
7.
Assessment of magnesium intake according to requirement in dairy cows
Holger Martens, Friederike Stumpff
Journal of Animal Physiology and Animal Nutrition
 
8.
Analysis of pH and electrolytes in blood and ruminal fluid, including kidney function tests, in sheep undergoing long-term surgical procedures
Lucie Grimm, Esther Humann-Ziehank, Norman Zinne, Patrick Zardo, Martin Ganter
Acta Veterinaria Scandinavica
 
ISSN:1230-1388