Abstract:
:Data about colonic mucosa transport of short-chain fatty acids in cirrhotic patients are still lacking. The aim of the present study was to compare the rectal mucosa transport of n-butyrate and its effect on transport of other electrolytes and endoluminal pH in normal subjects and in cirrhotic patients by using a rectal dialysis technique. Thirteen subjects with normal hepatic function tests and 17 cirrhotic patients were enrolled. Dialysis bags containing 80 mmol/liter of butyrate in a neutral pH (6.8) electrolyte solution were placed in the rectum of enrolled subjects for 60 min. Net transport rate was calculated for butyrate, sodium, chloride, potassium, and bicarbonate. The differences in pH between initial and final dialysis solutions was also evaluated in the two groups in the study. Net butyrate absorption was significantly lower in cirrhotic patients than in controls (65.2 +/- 38.6 vs 101.2 +/- 45.3 nmol/min/cm2, respectively; P = 0.02). Furthermore, cirrhotic patients showed a lower HCO3 secretion than controls (-26.9 +/- 19.9 vs -45.1 +/- 20.0, respectively; P = 0.01). No differences were found in transport of the other electrolytes. The pH in the final dialysis solution in cirrhotic patients was not significantly lower than in the controls (7.15 vs 7.35; P = 0.1). In conclusion, the impairment of butyrate absorption and the concurrent reduction of bicarbonate secretion observed in cirrhotic patients may suggest a selective hypoactivity of apical HCO3-/SCFA- antiport located at the colonocyte apical membrane.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Onori L,Pimpo MT,Palumbo GC,Gili L,Marchetti G,Saltarelli P,Aggio A,Frieri Gdoi
10.1023/a:1011982024849subject
Has Abstractpub_date
2001-10-01 00:00:00pages
2084-8issue
10eissn
0163-2116issn
1573-2568journal_volume
46pub_type
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