Free thiamine as the likely precursor of endocellular thiamine phosphates in everted rings of rat jejunum

1975 ◽  
Vol 356 (2) ◽  
pp. 111-120 ◽  
Author(s):  
G. Ferrari ◽  
G. Sciorelli ◽  
P. Del Poggio ◽  
U. Ventura ◽  
G. Rindi
Keyword(s):  
Rat Jejunum ◽  
Thiamine Phosphates

Peptides derived from casein induce mucus secretion in rat jejunum: Involvement of opioid stimulation

2001 ◽  
Vol 120 (5) ◽  
pp. A675-A675
Author(s):  
F TOUMI ◽  
J CLAUSTRE ◽  
A TROMPETTE ◽  
G JOURDAN ◽  
H GUIGNARD ◽  
...  
Keyword(s):  
Mucus Secretion ◽  
Rat Jejunum

Thiamine transport in the central nervous system

1976 ◽  
Vol 230 (4) ◽  
pp. 1101-1107 ◽  
Author(s):  
R Spector
Keyword(s):  
Choroid Plexus ◽  
Intraventricular Injection ◽  
Simple Diffusion ◽  
Thiamine Transport ◽  
Choroid Plexuses ◽  
The Central Nervous System ◽  
The Brain ◽  
Thiamine Phosphates

Total thiamine (free thiamine and thiamine phosphates) transport into the cerebrospinal fluid (CSF), brain, and choroid plexus and out of the CSF was measured in rabbits. In vivo, total thiamine transport into CSF, choroid plexus, and brain was saturable. At the normal plasma total thiamine concentration, less than 5% of total thiamine entry into CSF, choroid plexus, and brain was by simple diffusion. The relative turnovers of total thiamine in choroid plexus, whole brain, and CSF were 5, 2, and 14% per h, respectively, when measured by the penetration of 35S-labeled thiamine injected into blood. From the CSF, clearance of [35S]thiamine relative to mannitol was not saturable after the intraventricular injection of various concentrations of thiamine. However, a portion of the [35S]thiamine cleared from the CSF entered brain by a saturable mechanism. In vitro, choroid plexuses, isolated from rabbits and incubated in artificial CSF, accumulated [35S]thiamine against a concentration gradient by an active saturable process that did not depend on pyrophosphorylation of the [35S]thiamine. The [35S]thiamine accumulated within the choroid plexus in vitro was readily released. These results were interpreted as showing that the entry of total thiamine into the brain and CSF from blood is regulated by a saturable transport system, and that the locus of this system may be, in part, in the choroid plexus.

scholarly journals Diabetes downregulates peptide transporter 1 in the rat jejunum: possible involvement of cholate-induced FXR activation

2020 ◽  
Vol 41 (11) ◽  
pp. 1465-1475
Author(s):  
Li-min Liang ◽  
Jun-jie Zhou ◽  
Feng Xu ◽  
Pei-hua Liu ◽  
Lan Qin ◽  
...  
Keyword(s):  
Peptide Transporter ◽  
Rat Jejunum ◽  
Peptide Transporter 1

Capsaicin's inhibition of alanine (ALA) absorption in the rat jejunum is neurally mediated and involves a decrease in the affinity for alanine absorption

1995 ◽  
Vol 108 (4) ◽  
pp. A716
Author(s):  
K.A. Barada ◽  
S.S. Dika ◽  
S.F. Atweli ◽  
A.M. Taha ◽  
N.E. Saade ◽  
...  
Keyword(s):  
Rat Jejunum

Analytical Subcellular Fractionation Studies on Rat Liver and on Isolated Jejunal Enterocytes with Special Reference to the Separation of Lysosomes, Peroxisomes and Mitochondria

1976 ◽  
Vol 50 (5) ◽  
pp. 355-366 ◽  
Author(s):  
T. J. Peters ◽  
H. Shio
Keyword(s):  
Rat Liver ◽  
Sucrose Density Gradient ◽  
Subcellular Fractionation ◽  
Low Molecular Weight ◽  
Rat Jejunum ◽  
Marker Enzymes ◽  
Good Separation ◽  
Subcellular Organelles ◽  
Rat Liver Cells ◽  
Isopycnic Centrifugation

1. Enterocytes were isolated from rat jejunum and characterized morphologically. 2. Attempts to separate the enterocyte subcellular organelles, characterized by their marker enzymes, with isopycnic centrifugation were unsuccessful but good separation of peroxisomes, lysosomes and mitochondria was achieved by sedimentation through a shallow sucrose density gradient with a superimposed inverse gradient of low-molecular-weight dextran. 3. The properties and enzyme activities of the principal subcellular organelles in rat liver cells and enterocytes were compared.

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