Abstract：
:The physiology of masseter muscles is known to change in response to functional demands, but the effect on the satellite cell (SC) population is not known. In this study, the hypothesis is tested that a decreased functional demand of the masseter muscle causes a reduction of SCs. To this end, twelve 5-week-old male Sprague-Dawley rats were put on a soft diet (SD, n = 6) or a hard diet (HD, n = 6) and sacrificed after 14 days. Paraffin sections of the superficial masseter and the m. digastricus (control muscle) were stained with haematoxylin and eosin for tissue survey and with anti-myosin heavy chain (MHC) for slow and fast fibres. Frozen sections of both muscles were double-stained for collagen type IV and Pax7. Slow MHC fibres were equally distributed in the m. digastricus but only localized in a small area of the m. masseter. No differences between HD or SD for the m. digastricus were found. The m. masseter had more SCs per fibre in HD than in SD (0.093 ± 0.007 and 0.081 ± 0.008, respectively; P = 0.027). The m. masseter had more fibres per surface area than the m. digastricus in rats with an SD group (758.1 ± 101.6 and 568.4 ± 85.6, P = 0.047) and a HD group (737.7 ± 32.6 and 592.2 ± 82.2; P = 0.007). The m. digastricus had more SCs per fibre than the m. masseter in the SD group (0.094 ± 0.01 and 0.081 ± 0.008; P = 0.039). These results suggest that reduced masseter muscle function is related to a lower number of SCs. Reduced muscle function might decrease microdamage and hence the requirement of SCs in the muscle fibres.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Kuijpers MA,Grefte S,Bronkhorst EM,Carels CE,Kiliaridis S,Von den Hoff JWdoi
10.1093/ejo/cjs044subject
Has Abstractpub_date
2014-06-01 00:00:00pages
262-7issue
3eissn
0141-5387issn
1460-2210pii
cjs044journal_volume
36pub_type
杂志文章abstract：Objectives:To assess the potential effects of casein phosphopeptides (CPPs) on orthodontically induced iatrogenic root resorption (OIIRR) and orthodontic teeth movement. Materials and methods:Forty Wistar rats (aged 11 weeks) were randomly divided into experimental group (EG; n = 20) that received a diet supplemented ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
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更新日期：2017-10-01 00:00:00
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journal_title：European journal of orthodontics
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更新日期：2001-06-01 00:00:00
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journal_title：European journal of orthodontics
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journal_title：European journal of orthodontics
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更新日期：2018-05-25 00:00:00
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journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
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更新日期：2011-12-01 00:00:00
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journal_title：European journal of orthodontics
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更新日期：2013-08-01 00:00:00
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journal_title：European journal of orthodontics
pub_type： 临床试验,杂志文章,随机对照试验
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更新日期：1996-02-01 00:00:00
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journal_title：European journal of orthodontics
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更新日期：2008-08-01 00:00:00
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