Changes in the muscle fibre properties of the mouse temporal muscle after weaning.
To clarify changes in the muscle fibre properties of the temporal muscle related to the start of masticatory movement, we immunohistochemically investigated myosin heavy chain (MyHC) isoform protein expression using pre-weaning and post-weaning mice. In addition, we examined the expression of a gene coding for those MyHC proteins. Immediately after weaning, isoforms with fast and potent contractility were frequent. This suggests that the temporal muscle plays an important role in a marked functional change in the oral cavity from lactation to mastication, contributing to oral function in cooperation with other masticatory muscles.
Suzuki
K
K
Department of Anatomy, Tokyo Dental College 1-2-2 Masago, Chiba-City, Chiba, Japan.
Abe
S
S
Kim
H J
HJ
Usami
A
A
Iwanuma
O
O
Okubo
H
H
Ide
Y
Y
D000818:Animals; D018507:Gene Expression Regulation, Developmental; D007150:Immunohistochemistry; D008409:Mastication / Q000502:physiology*; D051379:Mice; D008813:Mice, Inbred ICR; D018485:Muscle Fibers, Skeletal / Q000737:chemistry / Q000378:metabolism*; D018995:Myosin Heavy Chains / Q000032:analysis / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000378:metabolism; D011897:Random Allocation; D013703:Temporal Muscle / Q000737:chemistry*; D014886:Weaning
D012333:RNA, Messenger; D018995:Myosin Heavy Chains