Morphological adaptation with preserved proliferation/transporter content in the colon of patients with short bowel syndrome.
In short bowel syndrome (SBS), although a remaining colon improves patient outcome, there is no direct evidence of a mucosal colonic adaptation in humans. This prospective study evaluates morphology, proliferation status, and transporter expression level in the epithelium of the remaining colon of adult patients compared with controls. The targeted transporters were Na+/H+ exchangers (NHE2 and 3) and oligopeptide transporter (PepT1). Twelve adult patients with a jejuno-colonic anastomosis were studied at least 2 yr after the last surgery and compared with 11 healthy controls. The depth of crypts and number of epithelial cells per crypt were quantified. The proliferating and apoptotic cell contents were evaluated by revealing Ki67, PCNA, and caspase-3. NHE2, NHE3, PepT1 mRNAs, and PepT1 protein were quantified by quantitative RT-PCR and Western blot, respectively. In patients with SBS compared with controls, 1) hyperphagia and severe malabsorption were documented, 2) crypt depth and number of cells per crypt were 35% and 22% higher, respectively (P < 0.005), whereas the proliferation and apoptotic levels per crypt were unchanged, and 3) NHE2 mRNA was unmodified; NHE3 mRNA was downregulated near the anastomosis and unmodified distally, and PepT1 mRNA and protein were unmodified. We concluded that, in hyperphagic patients with SBS with severe malabsorption, adaptive colonic changes include an increased absorptive surface with an unchanged proliferative/apoptotic ratio and well-preserved absorptive NHE2, NHE3, and PepT1 transporters. This is the first study showing a controlled nonpharmacological hyperplasia in the colon of patients with SBS.
Joly
Francisca
F
Service de Gastroentérologie et Assistance Nutritive, Pôle des Maladies de l'Appareil Digestif, Hôpital Beaujon, Clichy, France. francisca.joly@bjn.aphp.fr
Mayeur
Camille
C
Messing
Bernard
B
Lavergne-Slove
Anne
A
Cazals-Hatem
Dominique
D
Noordine
Marie-Louise
ML
Cherbuy
Claire
C
Duée
Pierre-Henri
PH
Thomas
Muriel
M
D000222:Adaptation, Physiological; D000368:Aged; D017209:Apoptosis; D016022:Case-Control Studies; D049109:Cell Proliferation; D003106:Colon / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology* / Q000601:surgery; D005260:Female; D006801:Humans; D006963:Hyperphagia / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology; D006965:Hyperplasia; D007408:Intestinal Absorption; D007413:Intestinal Mucosa / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009752:Nutritional Status; D000074011:Peptide Transporter 1; D011446:Prospective Studies; D012333:RNA, Messenger / Q000378:metabolism; D012778:Short Bowel Syndrome / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology*; D000074083:Sodium-Hydrogen Exchanger 3; D017923:Sodium-Hydrogen Exchangers / Q000235:genetics / Q000378:metabolism*; D027981:Symporters / Q000235:genetics / Q000378:metabolism*; D013997:Time Factors
D000074011:Peptide Transporter 1; D012333:RNA, Messenger; C082186:SLC15A1 protein, human; C081517:SLC9A2 protein, human; C000613385:SLC9A3 protein, human; D000074083:Sodium-Hydrogen Exchanger 3; D017923:Sodium-Hydrogen Exchangers; D027981:Symporters