Biological Activities of a Novel Lectin Derived from Silkworm Faeces: Characteristic Changes of Mouse Peritoneal Macrophages by the Lectin

Cell Structure and Function

Etsuko Hirayama¹  Hisayuki Maekawa¹  Akihiro Hiraki¹  Jeman Kim¹ 

[1] Institutes of Molecular and Cellular Biology for Pharmaceutical Sciences, Kyoto Pharmaceutical University

关键词: macrophages;    projections;    podosomes;    lectin;    silkworm faeces;   

DOI  :  10.1247/csf.23.303

学科分类：分子生物学，细胞生物学和基因

来源: Japan Society for Cell Biology

【 摘 要 】

References(30)Cited-By(1)A novel lectin derived from silkworm faeces, named NUE, activates phagocytosis of mouse peritoneal macrophages (9). At this time, significant morphological changes of the cells take place. NUE-treated macrophages formed projection-like neurocytes within 12 hr of treatment, and appeared somewhat flat in shape with the activation of cell growth. Associated with the morphological changes, actin was organized in dot-like structures corresponding to cell-substratum contact sites in NUE-treated macrophages. Vinculin, a cytoskeletal protein involved in microfilament-membrane interaction, formed doughnut-like rings matching the actin-dots, called "podosomes". Furthermore, observation by interference reflection microscopy showed that NUE-treated macrophages adhered more strongly to the substratum at local areas. According to these changes, more proteins associated with cell-substratum contact sites became to detergent-resistant. It was shown that NUE changed adhesive form of mouse peritoneal macrophages structurally and qualitatively.

【 授权许可】

Unknown