Source:http://linkedlifedata.com/resource/pubmed/id/16944839
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rdf:type | |
lifeskim:mentions |
umls-concept:C0016452,
umls-concept:C0024876,
umls-concept:C0027100,
umls-concept:C0034693,
umls-concept:C0034721,
umls-concept:C0035696,
umls-concept:C0332529,
umls-concept:C0392747,
umls-concept:C0441889,
umls-concept:C0443172,
umls-concept:C0449719,
umls-concept:C0597298,
umls-concept:C1280500,
umls-concept:C1424660,
umls-concept:C2263377
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pubmed:issue |
2
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pubmed:dateCreated |
2006-9-1
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pubmed:abstractText |
We investigated the effect of a change in food consistency on properties of the masseter muscle in 3-week-old rats fed a soft diet for 9 weeks (Group S) and fed a soft diet for 5 weeks followed by a hard diet for 4 weeks (Group S-H). The NADH-O2 oxidoreductase activity, levels of mRNAs transcribed from genes encoding NADH-ubiquinone oxidoreductase (Complex I: ND1, 51kDa, and 75kDa) and myosin heavy chain (MyHC) isoforms and the phenotype of the muscle fibers were measured in the superficial and deep portions of the muscle. In the period from 8 weeks to 12 weeks of age, NADH-O2 oxidoreductase enzyme activity in both the superficial and deep portions of the muscle showed similar patterns in Group S and Group S-H. In contrast, the ND1, 51kDa and 75kDa mRNA levels in the superficial and deep portions of the masseter muscle in the Group S-H were higher than those of Group S in the 12-week-old rats, except for the 51kDa mRNA in the superficial portion of the masseter muscle. MyHC-IIa and MyHC-IId/x mRNA levels in the superficial portion of the masseter muscle were higher in the Group S-H than in the Group S. These observations suggest that short-term feeding stress such as the transition from a soft diet to a hard diet causes changes in oxidative metabolism, in mRNA levels for the Complex I components ND1 and 75kDa, and the mRNA levels for the MyHC isoforms IIa and IId/x in the superficial portion of rat masseter muscle, but no changes in the composition of muscle fiber types.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Aug
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pubmed:issn |
0030-154X
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
83
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
61-71
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:16944839-Animals,
pubmed-meshheading:16944839-Diet,
pubmed-meshheading:16944839-Electron Transport Complex I,
pubmed-meshheading:16944839-Male,
pubmed-meshheading:16944839-Masseter Muscle,
pubmed-meshheading:16944839-Mitochondria, Muscle,
pubmed-meshheading:16944839-Muscle Fibers, Skeletal,
pubmed-meshheading:16944839-Myosin Heavy Chains,
pubmed-meshheading:16944839-Protein Isoforms,
pubmed-meshheading:16944839-RNA, Messenger,
pubmed-meshheading:16944839-Rats,
pubmed-meshheading:16944839-Rats, Wistar
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pubmed:year |
2006
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pubmed:articleTitle |
Effect of changes in food consistency on NADH-ubiquinone oxidoreductase activity and levels of mRNA for ND1, 51kDa, 75kDa and myosin heavy chain isoforms in two different portions of rat masseter muscle.
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pubmed:affiliation |
Department of Anatomy, School of Life Dentistry at Tokyo, the Nippon Dental University, 1-9-20 Fujimi, Chiyoda-Ku, Tokyo 102-8159, Japan.
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pubmed:publicationType |
Journal Article
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