Superficial and deep layer muscle fibre properties of the mouse masseter before and after weaning

Shida, Tsuyoshi; Abe, Shinichi; Sakiyama, Kazuo; Agematsu, Hiroko; Mitarashi, Satoshi; Tamatsu, Yuichi; Ide, Yoshinobu

doi:10.1016/j.archoralbio.2004.08.005

Cited by 26 publications

(23 citation statements)

References 18 publications

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“…This change was considered to fit with the mouse-specific fast mastication action (Shida et al, 2005;Suzuki et al, 2007). However, in the current study, MyHC2b expression was barely detected in the mouse mylohyoid muscle, even in the post-weaning period.…”

Section: Discussionmentioning

confidence: 59%

“…Many studies of mouse head and neck muscle fibers have compared the ratio of MyHC-2a and MyHC-2b. These studies found that MyHC-2b exists as a high-contraction-speed type of fiber, and MyHC-2a as a low-contraction-speed type of fiber, and that these fiber types represent muscle function (Shida et al, 2005;Okubo et al, 2006;Suzuki et al, 2007). Therefore, we also analyzed these two isoforms.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, we aimed at clarifying the characteristics and functional role of the mouse mylohyoid muscle in the growth stage. Since the majority of mouse muscles with a mastication function have been reported to show characteristic prominent changes after weaning (Gojo et al, 2002;Shida et al, 2005), both pre-weaning (2-weekold) mice and post-weaning (4-week-old) mice, as well as adult (9-week-old) mice, were used in this study. Many studies of mouse head and neck muscle fibers have compared the ratio of MyHC-2a and MyHC-2b.…”

Section: Discussionmentioning

confidence: 99%

“…Following this report, various detailed studies on the relationship between the composition ratio of the fast-twitch fiber type and function in the muscle have been performed. Regarding muscles of the oral region, the adult mouse masseter muscle barely expresses MyHC-2a, and MyHC-2b has been reported to include most of the isoform types (Shida et al, 2005). Again, although the anterior belly of the digastric muscle of the adult mouse does not express MyHC-2a, a large amount of MyHC-2b has been observed, as in the masseter muscle (Okubo et al, 2006).…”

Section: Introductionmentioning

confidence: 97%

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Myofiber Properties of Mouse Mylohyoid Muscle in the Growth Period

et al. 2008

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The mouse mylohyoid muscle belongs to the mastication-related suprahyoid muscle group. It shows a plate-like morphology and forms the mouth floor. There have been no reports on the characteristics of the mouse mylohyoid muscle fibers, and especially on their functional role during ingestion action, and many points remain unclear. We examined the mouse mylohyoid muscle at both the transcriptional and protein levels by RT-PCR, immunohistochemistry, and Western Blotting. MyHC-2b, which is expressed in almost all head and neck muscles and is thought to play a role in rapid mastication movement, was not detected in the mouse mylohyoid muscle. This result suggests that the mouse mylohyoid muscle has a special function and does not directly function during ingestion.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Myofiber Properties of Mouse Mylohyoid Muscle in the Growth Period

et al. 2008

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“…It has also been shown that the MyHC isoforms undergo reversible changes (Sartorius et al, 1998). Moreover, these reversible changes occur according to changes in oral motor function (Gojo et al, 2002;Doi et al, 2003;Shida et al, 2005;Maejima et al, 2005). This indicates that oral motor function and composition ratios for the isoforms are closely related.…”

Section: Discussionmentioning

confidence: 97%

Myosin heavy chain composition of tongue muscle in microphthalmic (mi/mi) mice before and after weaning

Yanagisawa

Abe

Agematsu

et al. 2006

Annals of Anatomy - Anatomischer Anzeiger

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running title: MyHC in tongue muscle of mi/mi mice 2 SummaryTo elucidate the effects of teeth on muscle fibers in tongue during the development process, we examined the expression of muscle contractile proteins and the genes for those proteins in normal mice and microphthalmic (mi/mi) mice with impaired tooth eruption. The mice were observed during the growth period, including weaning, which is when feeding movements undergo major changes.Expression of the myosin heavy chain (MyHC)-2a protein, whose contraction speed is relatively slow, disappeared after weaning in normal mice, while it remained in high concentrations even after weaning in mi/mi mice. The presence of MyHC-2a after weaning in mice with no tooth eruption was attributed to a compensation for lack of proper masticatory function and sucking-like movements, as MyHC-2a is necessary for these movements.

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26 General Principles of Evolutionary Morphology

Macho¹

2007

Handbook of Paleoanthropology

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Superficial and deep layer muscle fibre properties of the mouse masseter before and after weaning

Cited by 26 publications

References 18 publications

Myofiber Properties of Mouse Mylohyoid Muscle in the Growth Period

Myofiber Properties of Mouse Mylohyoid Muscle in the Growth Period

Myosin heavy chain composition of tongue muscle in microphthalmic (mi/mi) mice before and after weaning

26 General Principles of Evolutionary Morphology

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