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. 1999 Jan;44(1):12–16. doi: 10.1136/gut.44.1.12

Dietary polyamines are essential luminal growth factors for small intestinal and colonic mucosal growth and development

C Loser 1, A Eisel 1, D Harms 1, U Folsch 1
PMCID: PMC1760068  PMID: 9862820

Abstract

Background—Polyamines are essential for cell growth. Dietary and probably gut bacterial derived polyamines contribute significantly to the polyamine body pool. 
Aims—To evaluate the influence of dietary, luminal polyamines on growth and development of different gastrointestinal organs in normally growing rats. 
Methods—Male suckling Wistar rats were randomly allocated to four treatment groups: polyamine deficient diet (PDD); PDD plus antibiotics (neomycin 2 g/kg and metronidazole 34 mg/kg); PDD plus polyamine supplementation at normal concentrations; or normal standard laboratory chow. After a six month feeding period 7-10 animals/group were sacrificed. 
Results—No differences in body weight gain, food consumption, or general behaviour could be observed between the four groups of animals. Feeding of PDD alone or PDD plus antibiotics resulted in a highly significant decrease in organ weight, protein content, and DNA content in small intestinal and colonic mucosa whereas no alterations were found in the liver. 
Conclusions—Long term feeding of polyamine deficient diets resulted in a significant hypoplasia of small intestinal and colonic mucosa. Dietary, luminal polyamines are important local factors for growth and the development of small intestinal and colonic mucosa. 



Keywords: colon; gut; nutrition; ornithine decarboxylase; polyamines; polyamine deficient diet

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Figure 1 .

Figure 1

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Organ weight of (A) small intestinal mucosa, (B) colonic mucosa, and (C) liver in rats (n=7-10) after a 26 week feeding period with either PDD, PDD + AB, PDD + PA, or standard laboratory chow. Significant differences versus PDD + PA: *p<0.01; †p<0.005. 


Figure 2 .

Figure 2

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Protein content of (A) small intestinal mucosa, (B) colonic mucosa, and (C) liver in rats (n=7-10) after a 26 week feeding period with either PDD, PDD + AB, PDD + PA, or standard laboratory chow. Significant differences versus PDD + PA: *p<0.01. 


Figure 3 .

Figure 3

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DNA content of (A) small intestinal mucosa, (B) colonic mucosa, and (C) liver in rats (n=7-10) after a 26 week feeding period with either PDD, PDD + AB, PDD + PA, or standard laboratory chow. Significant differences versus PDD + PA: *p<0.01; †p<0.005. 


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