Expression of sialic acids in the developing murine tubotympanum

Kazuyoshi Ueno, Masaru Ohyama, David J. Lim

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Sialoglycoconjugates in the developing murine tubotympanum were characterized using lectin histochemistry with wheat germ agglutinin (WGA), Umax flavus agglutinin (LFA), Sambucus nigra agglutinin (SNA), Maackia amurensis agglutinin (MAA), peanut agglutinin (PNA), and neuraminidase treatment. WGA, LFA, MAA, and neuraminidase-PNA labeled epithelial goblet cells, glandular mucous cells, and cell surfaces of adult and newborn murine tubotympanum. SNA did not label any secretory components. PNA labeled secretory cells and cell surfaces of the fetal tubotympanum without neuraminidase treatment. After birth, these secretory cells and cell surfaces were labeled with PNA only after neuraminidase treatment. These results revealed that: Sialoglycoconjugates are produced from glandular mucous cells and epithelial goblet cells and are present on cell surfaces and within the mucous blanket; their terminal tri-saccharide linkage appears to be the sequence Neu5Ac(α[2-3)Gal(β1-3)GalNAc; sialic acids appear before birth and gradually increase; terminal galactose residues are masked by sialic acids after birth.

Original languageEnglish (US)
Pages (from-to)824-830
Number of pages7
JournalActa Oto-Laryngologica
Issue number2
StatePublished - 1992


  • Glycoconjugates
  • Histochemistry
  • Lectin
  • Microwave irradiation

ASJC Scopus subject areas

  • Otorhinolaryngology


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