Estudio Inmunohistoquímico de la amelogenina y proteínas de membrana asociadas a lisosomas (LAMPs) en el cartílago

Translated title of the contribution: Immunohistochemical study of amelogenin and lysosome- associate membrane proteins (LAMPs) in cartilage

Yuji Hatakeyama, Junko Hatakeyama, Kyoko Oka, Eichi Tsuruga, Tetsuichiro Inai, Hisashi Anan, Yoshihiko Sawa

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Amelogenin is one of the enamel matrix proteins secreted by ameloblasts during enamel formation in tooth development. Recent studies showed that the amelogenin is expressed in chondrocyte. Lysosome-associated membrane proteins (LAMPs) have been identified as binding partner proteins to amelogenin and it has been suggested they act as signaling receptors of amelogenin. The purpose of this study is to clarify the localization of amelogenin and LAMPs in growth plate cartilage and cartilaginous nodules in micromass culture. Mouse knee joints including tibia growth plate at 4 weeks old and micromass cultures of limb bud mesenchymal cells after 2 weeks were fixed in paraformaldehyde, routinely processed, sections were cut and immunostained with amelogenin, collagen type II and type X, LAMP-1 and -3. The positive immunoreaction of amelogenin was observed both in proliferation and hypertrophic zone cartilage of growth plate after enzymatic pretreatment in immunostaining. Furthermore, cartilaginous nodules in micromass culture were immunopositive to amelogenin. The chondrocytes in the proliferation zone of the growth plate were immunopositive to LAMP-1 but weakly stained in the chondrocytes of hypertrophic zone. These observations indicate that amelogenin may be present in cartilage matrix produced in vivo and in vitro and amelogenin may involve cartilage formation through the LAMP-1 signaling pathway.

Translated title of the contributionImmunohistochemical study of amelogenin and lysosome- associate membrane proteins (LAMPs) in cartilage
Original languageSpanish
Pages (from-to)618-626
Number of pages9
JournalInternational Journal of Morphology
Volume32
Issue number2
DOIs
Publication statusPublished - Jun 2014
Externally publishedYes

Keywords

  • Amelogenin
  • Cartilag0e
  • Chondrogenesis
  • Lysosome-associated membrane proteins (LAMPs)

ASJC Scopus subject areas

  • Anatomy

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