The effect of L-glutamine on salt and water absorption: a jejunal perfusion study in cholera in humans.
OBJECTIVE
To assess the efficacy of an L-glutamine solution on jejunal salt and water absorption in cholera patients.


METHODS
A randomized double-blind jejunal perfusion study.


METHODS
International Centre for Diarrhoeal Disease Research, Bangladesh.


METHODS
Nineteen adults with acute cholera.


METHODS
Perfusion of balanced salt solutions alternated with defined glucose salt solution and glutamine glucose salt or alanine glucose salt solutions.


METHODS
Net jejunal water and sodium secretion.


RESULTS
Perfusion of glutamine in the presence of glucose significantly reduced net water secretion (JnetH2O = -2.6 +/- 1.3 ml/h/cm) and also reduced net sodium secretion (JnetNa = -213 +/- 153 mumol/h/cm). Similar results were observed during the perfusion of solutions that contained alanine in addition to glucose (JnetH2O = -4.2 +/- 1.1 ml/h/cm and JnetNa = -444 U +/- 142 mumol/h/cm, respectively) or glucose alone (JnetH2O = -4.3 +/- 1.7 ml/h/cm and JnetNa = -452 +/- 212 mumol/h/cm, respectively). In addition, a higher basal secretion was associated with a greater stimulation of water absorption (F = 17, P < 0.001).


CONCLUSIONS
Glutamine in the presence of glucose significantly reduces net water secretion and also reduces sodium secretion; higher basal secretion is associated with greater water absorption. As glutamine is able to stimulate water absorption to the same degree as glucose and alanine, and because it has the theoretical advantage of providing fuel for the mucosa, the inclusion of glutamine as the sole substrate in oral rehydration solution warrants further study.
van Loon
F P
FP
International Centre for Diarrhoeal Disease Research, Bangladesh.
Banik
A K
AK
Nath
S K
SK
Patra
F C
FC
Wahed
M A
MA
Darmaun
D
D
Desjeux
J F
JF
Mahalanabis
D
D
D000328:Adult; D002771:Cholera / Q000503:physiopathology*; D004311:Double-Blind Method; D005973:Glutamine / Q000494:pharmacology*; D006801:Humans; D007408:Intestinal Absorption / Q000187:drug effects*; D007583:Jejunum / Q000187:drug effects / Q000378:metabolism*; D008297:Male; D015532:Rehydration Solutions; D012965:Sodium Chloride / Q000378:metabolism*; D014867:Water / Q000378:metabolism*
D015532:Rehydration Solutions; D014867:Water; D005973:Glutamine; D012965:Sodium Chloride