Isolation of microtubule coils from normal human platelets.

Abstract:

:The blood platelet is the only human cell known to have a circumferential band of microtubules. However, the mechanisms involved in assembly of the multi-looped coil, its interaction with the cell membrane to support discoid shape, and constriction into tight rings around centrally concentrated organelles in activated platelets are unknown. Separation of the microtubule rings from intact platelets would permit new approaches to solution of these questions. The present study has used simultaneous detergent extraction and fixation to isolate intact microtubule coils in significant numbers from suspended platelets for the first time. Isolated coils closely resembled the circumferential band observed in thin sections of plastic embedded platelets and in platelets prepared by the negative-stain whole-mount method. Enough microtubule coils could be recovered from suspensions of concentrated platelets to permit counting and quantitation on microscope grids. Results of this study will permit new approaches to clarification of the structural physiology of platelet microtubule coils.

journal_name

Blood

journal_title

Blood

authors

White JG,Krumwiede M

subject

Has Abstract

pub_date

1985-04-01 00:00:00

pages

1028-32

issue

4

eissn

0006-4971

issn

1528-0020

journal_volume

65

pub_type

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