scholarly journals FORMATION OF CELL COAT MATERIAL FOR THE WHOLE SURFACE OF COLUMNAR CELLS IN THE RAT SMALL INTESTINE, AS VISUALIZED BY RADIOAUTOGRAPHY WITH L-FUCOSE-3H

1970 ◽  
Vol 46 (2) ◽  
pp. 409-416 ◽  
Author(s):  
G. Bennett ◽  
C. P. Leblond
Keyword(s):  
Small Intestine ◽  
Rat Small Intestine ◽  
Cell Coat ◽  
Columnar Cells ◽  
Coat Material

scholarly journals Radioautographic visualization of differences in the pattern of [3H]uridine and [3H]orotic acid incorporation into the RNA of migrating columnar cells in the rat small intestine.

1984 ◽  
Vol 98 (5) ◽  
pp. 1619-1629 ◽  
Author(s):  
M Uddin ◽  
G G Altmann ◽  
C P Leblond
Keyword(s):  
Small Intestine ◽  
Orotic Acid ◽  
De Novo ◽  
Transfer Rna ◽  
Rat Small Intestine ◽  
Salvage Pathway ◽  
Columnar Cells ◽  
Silver Grains ◽  
Crypt Base ◽  
Crypt Cells

The epithelium of rat small intestine was radioautographed to examine whether RNA is synthesized by the salvage pathway as shown after [3H]uridine injection or by the de novo pathway as shown after [3H]orotic acid injection. The two modes of RNA synthesis were thus investigated during the migration of columnar cells from crypt base to villus top, and the rate of synthesis was assessed by counting silver grains over the nucleolus and nucleoplasm at six levels along the duodenal epithelium--that is, in the base, mid, and top regions of the crypts and in the base, mid, and top regions of the villi. Concomitant biochemical analyses established that, after injection of either [5-3H]uridine or [5-3H]orotic acid: (a) buffered glutaraldehyde fixative was as effective as perchloric acid or trichloracetic acid in insolubilizing the nucleic acids of rat small intestine; (b) a major fraction of the nucleic acid label was in RNA, that is, 91% after [3H]uridine and 72% after [3H]orotic acid, with the rest in DNA; and (c) a substantial fraction of the RNA label was in poly A+ RNA (presumed to be messenger RNA). In radioautographs of duodenum prepared after [3H] uridine injection, the count of silver grains was high over nucleolus and nucleoplasm in crypt base cells and gradually decreased at the upper levels up to the villus base. In the rest of the villus, the grain count over the nucleolus was negligible, while over the nucleoplasm it was low but significant. After [3H]-orotic acid injection, the number of silver grains over the nucleolus was negligible at all levels, whereas over the nucleoplasm the number was low in crypt cells, but high in villus cells with a peak in mid villus. The interpretation is that, except for a small amount of label incorporated into DNA from either precursor by crypt cells, the bulk of the label is incorporated into RNA as follows. In the crypts, cells make almost exclusive use of uridine, that is, of the salvage pathway, for the synthesis of ribosomal RNA in the nucleolus and of messenger and transfer RNA in the nucleoplasm. However, when cells pass from crypt to villus, they mainly utilize orotic acid--i.e., the de novo pathway--for the synthesis of messenger and transfer RNA within the nucleoplasm.

In situ demonstration of migration of dendritic cells released from rat small intestine to mesenteric lymph nodes

2001 ◽  
Vol 120 (5) ◽  
pp. A183-A183
Author(s):  
H KOBAYASHI ◽  
H NAGATA ◽  
S MIURA ◽  
T AZUMA ◽  
H SUZUKI ◽  
...  
Keyword(s):  
Dendritic Cells ◽  
Small Intestine ◽  
Lymph Nodes ◽  
Rat Small Intestine ◽  
Mesenteric Lymph Nodes ◽  
Mesenteric Lymph

Anti-inflammatory effect of STW 5, STW 6 and isolated extracts on the rat small intestine

2008 ◽  
Vol 29 (S 1) ◽  
Author(s):  
K Nieber ◽  
S Michael ◽  
K Grötzinger ◽  
JW Rauwald ◽  
O Kelber
Keyword(s):  
Small Intestine ◽  
Rat Small Intestine ◽  
Anti Inflammatory ◽  
Inflammatory Effect

Oral vanadate reduces Na(+)-dependent glucose transport in rat small intestine

Diabetes ◽  
1993 ◽  
Vol 42 (8) ◽  
pp. 1126-1132 ◽  
Author(s):  
K. L. Madsen ◽  
V. M. Porter ◽  
R. N. Fedorak
Keyword(s):  
Small Intestine ◽  
Glucose Transport ◽  
Rat Small Intestine
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