Ontology type: schema:ScholarlyArticle Open Access: True
2011-01
AUTHORSNana Yaa Baffour-Awuah, Eveline Delemarre, Yuko Fujiwara, Jarom Heijmans, David Boerwinkel, Selma Algra, John J. Fialkovich, Shabana Islam, Tjalling Bosse, Richard J. Grand, Stephen D. Krasinski, Robert K. Montgomery
ABSTRACTBACKGROUND AND AIM: The regulation of human intestinal lactase-phlorizin hydrolase remains incompletely understood. One kb of pig and 2 kb of rat 5'-flanking sequence controls correct tissue, cell, topographic, and villus LCT expression. To gain insight into human LCT expression, transgenic mouse lines were generated from 3.3 kb of human LPH 5' flanking sequence from a lactase persistent individual fused to a human growth hormone (hGH) reporter bounded by an insulator. METHODS: Four lines were identified in which reporter expression was specifically detectable in the intestine and no other organ, two of which demonstrated hGH expression specific to small and large intestine. Quantitative RT-PCR was carried out on proximal to distal segments of small intestine at fetal days 16.5 and 18.5 and at birth, postnatal days 7 and 28 in line 22. RESULTS: In fetal intestine, hGH expression demonstrated a proximal to distal gradient similar to that in native intestine. There was no significant difference between hGH expression levels at 7 and 28 days in segment 3, the midpoint of the small intestine, where expression of endogenous lactase is maximal at 7 days and declines significantly by 28 days. Distal small intestine displayed high levels of hGH expression in enteroendocrine cells, which were shown to be a subset of the PYY cells. CONCLUSIONS: Thus, a 3.3-kb LPH 5' flanking sequence construct from a lactase persistent individual is able to maintain postnatal expression in transgenic mice post weaning. More... »
PAGES59-69
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DOIhttp://dx.doi.org/10.1007/s10620-010-1480-2
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/21086165
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curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1007/s10620-010-1480-2'
RDF/XML is a standard XML format for linked data.
curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1007/s10620-010-1480-2'
This table displays all metadata directly associated to this object as RDF triples.
292 TRIPLES
21 PREDICATES
68 URIs
34 LITERALS
22 BLANK NODES