Development of the synovial membrane in the rat temporomandibular joint as demonstrated by immunocytochemistry for heat shock protein 25

The Anatomical Record. Part A, Discoveries in Molecular, Cellular, and Evolutionary Biology
Nobuyuki IkedaTakeyasu Maeda

Abstract

The synovial lining layer of the temporomandibular joint (TMJ) consists of macrophage-like type A cells and fibroblast-like type B cells. Until now, little information has been available on the development of the synovial membrane in TMJ. In the present study we examined the development of the synovial lining layer in the rat TMJ by light- and electron-microscopic immunocytochemistry for heat shock protein (Hsp) 25, which is a useful marker for type B cells. At embryonic day 19 (E19), a few Hsp25-positive cells first appeared in the upper portion of the developing condyle. During the formation of the upper articular cavity (E21 to postnatal day 1 (P1)), a few positive cells were arranged on its surface. Immunoelectron microscopy demonstrated that these cells had ultrastructural features of fibroblast-like type B cells. In addition, some Hsp25-positive cells moved to the deep portion by extending their cytoplasmic processes toward the articular cavity at P3. At that time, the presence of typical macrophage-like type A cells in the lining layer was confirmed by immunoelectron microscopy. The slender processes of Hsp25-positive cells showed a continuous covering with the synovial surface at P7, followed by a drastic increase in th...Continue Reading

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Citations

Feb 20, 2009·Histochemistry and Cell Biology·Min-Jung LeeHan-Sung Jung
May 13, 2010·Veterinary Pathology·L E CraigA J Cooley
Jan 19, 2008·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Sunil C VasanjeeMandi J Lopez
Feb 21, 2008·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Masahiro NiwanoTakeyasu Maeda
Aug 20, 2005·The Anatomical Record. Part A, Discoveries in Molecular, Cellular, and Evolutionary Biology·Akiko SuzukiTakeyasu Maeda
Dec 13, 2005·The Anatomical Record. Part A, Discoveries in Molecular, Cellular, and Evolutionary Biology·Kayoko Nozawa-InoueTakeyasu Maeda
May 26, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Kayoko Nozawa-InoueTakeyasu Maeda

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