Effect of spinal cord TRH deficiency on lower motorneuron function in the rat.

Abstract:

:Thyrotropin-releasing hormone (TRH), present in high concentrations in the mammalian spinal cord, exerts excitatory effects on the alpha-motorneuron (AMN) via axodendritic contacts. We used the neurotoxin 5,7-dihydroxytryptamine (5,7-DHT) to deplete TRH from the ventral horn of the spinal cord of adult rats to determine whether the tripeptide may be trophic to the AMN. The rats were studied blindly and sequentially for 11 weeks. Motor performance remained normal by clinical and electrophysiologic assessments. AMN counts were not reduced in the lumbar cord, and gastrocnemius muscle showed no evidence of denervation in treated rats. We conclude that in the adult rat chronic ventral horn TRH deficiency does not lead to AMN degeneration and is not associated with a significant alteration of AMN function.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Van den Bergh P,Kelly JJ Jr,Adelman L,Munsat TL,Jackson IM,Lechan RM

doi

10.1002/mus.880100504

subject

Has Abstract

pub_date

1987-06-01 00:00:00

pages

397-405

issue

5

eissn

0148-639X

issn

1097-4598

journal_volume

10

pub_type

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