Microwave-stimulated recovery of myosin-V immunoreactivity from formalin-fixed, paraffin-embedded human CNS.

Abstract:

:The lability of brain myosin-V (BM-V) to aldehyde-fixation has hindered immunohistochemical (IH) studies of this actin-based motor. We show here that BM-V immunoreactivity (IR) can be retrieved from formalin-fixed, paraffin-embedded human tissue. BM-V IR was optimally retrieved by boiling 5 microm cerebellar tissue sections in 10 mM sodium citrate buffer, pH 6, for 15 min, using a microwave oven set at 900 W and 2.45 GHz. A polyclonal, affinity purified anti-BM-V antibody, raised in rabbits against the tail domain of chicken BM-V, was shown here to recognize a single band in Western blots of human cortical homogenates. The combined use of this monospecific antibody and of the antigen retrieval (AR) method above allowed us to verify that BM-V IR is strongly expressed in human Purkinje cell bodies and dendrites, and in granule cells. The same pattern of BM-V IR expression was consistently and maximally detected in tissues stored in 10% formalin from 1 week to 2.5 months. The AR protocol for BM-V described here permits its IH study in formaldehyde-fixed tissues. It is a valuable tool to study BM-V in well fixed tissues, as occurs with the large collection of human archival tissue available.

journal_name

J Neurosci Methods

authors

Martins AR,Dias MM,Vasconcelos TM,Caldo H,Costa MC,Chimelli L,Larson RE

doi

10.1016/s0165-0270(99)00090-4

subject

Has Abstract

pub_date

1999-10-15 00:00:00

pages

25-9

issue

1-2

eissn

0165-0270

issn

1872-678X

pii

S0165-0270(99)00090-4

journal_volume

92

pub_type

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