Transport of water and electrolytes by rotavirus-infected mouse intestine: a time course study.
The movement of water and transport of Na+ and Cl- by mid-small intestine (M-SI) of rotavirus-infected neonatal mice was investigated by an in vitro perfusion technique. The concentrations of Na+, K+, and Cl- in the luminal contents of upper, middle, and lower small intestine and colon of infected mice were determined by flame photometry (Na+, K+) and an ion selective microelectrode (Cl-). In M-SI, maximal disturbance of water transport occurred at 72 h postinfection (PI): Infected tissue exhibited net water secretion. Water transport was also impaired at 144 h PI. Net secretion of Cl- occurred at 72 h PI, with some evidence of a second phase of reduced magnitude at 120-144 h PI. The magnitude and statistical significance of changes in Na+ transport were both less than those for Cl-, but the pattern of change was similar to that for Cl-. Luminal concentrations of Na+ were elevated between 48 and 144 h PI in the small intestine; this was particularly so in distal regions. Luminal Cl- concentration was maximally elevated to a considerable degree at 72 h PI and remained high at 96 h PI throughout the small intestine; thereafter, Cl- concentration returned to near normal. K+ concentration was unchanged in the small intestinal lumen; in the colon, however, K+ concentrations were depressed 72-168 h PI. In the light of previous data from this laboratory, the present data are interpreted as evidence for a secretory component in rotavirus-induced diarrhea.
Department of Microbiology, University of Birmingham, England.
W G
WG
Starkey
J
J
Collins
D C
DC
Candy
A J
AJ
Spencer
M P
MP
Osborne
J
J
Stephen
D000818:Animals; D001693:Biological Transport, Active; D003967:Diarrhea / Q000378:metabolism / Q000503:physiopathology*; D004573:Electrolytes / Q000493:pharmacokinetics; D007421:Intestine, Small / Q000378:metabolism / Q000503:physiopathology*; D051379:Mice; D012400:Rotavirus Infections / Q000378:metabolism / Q000503:physiopathology*; D013997:Time Factors; D014867:Water; D014882:Water-Electrolyte Balance
D004573:Electrolytes; D014867:Water