Linked Life Data

16956638

Source:http://linkedlifedata.com/resource/pubmed/id/16956638

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2006-10-31
pubmed:abstractText
Nutritional selenocompounds are transformed into the assumed common intermediate selenide, which is utilized for the synthesis of selenoenzymes or transformed into methylated metabolites for excretion. Hence, selenocompound metabolites can be traced only with labeled selenium. Here we applied a new tracer method for the metallomics of biometals using simultaneous speciation of each metallome labeled with different homo-elemental isotopes to metabolism and availability of selenium. Rats were depleted of endogenous natural abundance selenium by feeding a single selenium stable isotope ((82)Se-selenite) and then administered (76)Se-selenite and (77)Se-selenomethionine ((77)Se-SeMet)simultaneously. Biological samples were subjected to quantification and speciation analysis by HPLC-ICPMS. Metabolites of the labeled (76)Se and (77)Se and interaction with endogenous selenium were traced and examined without interference from the corresponding endogenous natural abundance isotopes. Differences in the distribution and metabolism among organs and between the two nutritional selenocompounds were compared under exactly identical biological and analytical conditions: (1) selenite was distributed more efficiently than SeMet in organs and body fluids except the pancreas. (2) SeMet was taken up by organs in its intact form. (3) Selenium of SeMet origin was distributed selectively in the pancreas and mostly bound to a protein together with intact SeMet. (4) Selenosugars A and B but not trimethylselenonium (TMSe) were detected in the liver. (5) Selenosugar B and TMSe were detected in the kidneys.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0041-008X
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
217
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
43-50
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Simultaneous tracing of 76Se-selenite and 77Se-selenomethionine by absolute labeling and speciation.
pubmed:affiliation
Graduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan. ktsuzuki@p.chiba-u.ac.jp <ktsuzuki@p.chiba-u.ac.jp>
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't