2000 Fiscal Year Final Research Report Summary
Identification of genes associated with epithelial growth using Ileojejunal transposition model
| Project/Area Number |
10557118
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Digestive surgery
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| Research Institution | Tohoku University |
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Principal Investigator |
FUKUSHIMA Kouhei Tohoku University, Graduate School of Medicine, Research Associate, 大学院・医学系研究科, 助手 (20271900)
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| Co-Investigator(Kenkyū-buntansha) |
SASAKI Iwao Tohoku University, Graduate School of Medicine, Professor, 大学院・医学系研究科, 教授 (60125557)
NAITO Hiroo Tohoku University, Hospital, Lecturer, 医学部附属病院, 講師 (90180223)
FUNAYAMA Yuji Tohoku University, Hospital, Lecturer, 医学部附属病院, 講師 (50192315)
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| Project Period (FY) |
1998 – 2000
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| Keywords | Short boroel Syndrome / total colectomy / molecular biology / epithelial cell / Cell pretiferation |
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| Research Abstract |
(1)Epithelial gene screening by differential display
a.Ileojeiunal transposition (IJT) model
Ileojejunal transposition was performed using SD rats and samall intestinal epithelial cells were isolated. We subcloned 8 gene and sequenced, resulting that all these clones encoded mitochondrial genes. Differential expresssion was not confirmed, indicating that selection of mitochondrial genes may be due to technical issues accompanied with differential display.
b.Short bowel model
Shor bowel model was established in SD rats and samall intestinal epithelial cells were isolated. We subcloned 11 genes including mitochondrial genes and solute carrier family 9, isoform 3 regulator 1from 80 differential displays.
(2)ornithine decarboxylase(ODC) induction in vitro
IEC6 cells were stimulated 0, 25, 50, and 100 ng/ml glucagon-like peptide 2 (GLP2) and expression of ODC mRNA was examined. Expression of ODC mRNA was stabe after stimulation. In contast, epidermal growth factor, used as a positive control, induced ODC mRNA.
(3)Intestinal adaptation following total colectomy
Rat total volectomy model was established and gene expression of remnant ileal epithelia was analyzed. 11b-hydroxysteroi dehydrogenase type2 (11b-HSD2) was remarkablly induced in the distal ileum probablly due to enhanced aldosterone in blood.
(4)Conclusion
Difficulties in this project was due to 1.inconsistent results from ileojejunal transposition model and 2.limitation of gene screening technique, differential display.
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