Electron microscopic observations of triple immunogold labelling for dystrophin, β-dystroglycan and adhalin in human skeletal myofibers |
| |
Authors: | Masahiko Inoue Yoshihiro Wakayama Makoto Murahashi Seiji Shibuya Takahiro Jimi Hiroko Kojima Hiroaki Oniki |
| |
Institution: | (1) Division of Neurology, Department of Medicine, Showa University Fujigaoka Hospital, Yokohama, Japan, JP;(2) Electron Microscope Laboratory, Showa University Fujigaoka Hospital, Yokohama, Japan, JP;(3) Division of Neurology, Department of Medicine, Showa University Fujigaoka Hospital, 1-30, Fujigaoka, Aoba-ku, Yokohama 227, Japan Tel.: 81-45-971-1151; Fax: 81-45-974-2204, JP |
| |
Abstract: | Dystrophin is the Duchenne muscular dystrophy gene product and is a membrane cytoskeletal protein present in the network
of the plasma membrane undercoat. Adhalin (50 kDa dystrophin-associated glycoprotein) and β-dystroglycan (43 kDa dystrophin-associated
glycoprotein) are the transmembrane components of the normal muscle plasma membrane, and β-dystroglycan has been demonstrated
to bind dystrophin at the inside surface of normal muscle plasma membrane. This investigation was undertaken to test whether
the epitopes of dystrophin, β-dystroglycan and adhalin are closely associated with each other by using triple immunogold labelling
electron microscopy on normal human skeletal myofibers. Although closely associated signals of triplet immunogold particles
were observed, there were less numerous than expected. However, closely associated signals of two epitopes of dystrophin and
β-dystroglycan, dystrophin and adhalin, or adhalin and β-dystroglycan were frequently observed. These ultrastructural findings
are consistent with biochemical evidence implying that dystrophin, β-dystroglycan and adhalin are closely associated with
each other at the normal muscle plasma membrane.
Received: 15 January 1996 / Revised, accepted: 1 April 1996 |
| |
Keywords: | Immunoelectron microscopy Dystrophin β -Dystroglycan Adhalin Skeletal myofiber |
本文献已被 SpringerLink 等数据库收录! |
|