Regeneration of detrusor muscle after subtotal cystectomy in the rat: effects on contractile proteins and bladder mechanics.

Abstract:

:The aim of the present study was to determine to what extent adult rats can produce new contracting bladder muscle and to see if such newly formed bladder tissue possesses characteristic mechanical properties or whether the ability to recover mechanically is so pronounced that the prehistory of the bladder is unimportant. Subtotal cystectomy was performed in adult female rats, leading to a pronounced decrease in total bladder weight. At 10 weeks, bladder weight had normalized. The histological appearance of such bladders was similar to that of the controls. Active and passive length-tension relations for the detrusor muscle were determined in controls and up to 10 weeks after surgery. Immediately after surgery active and passive forces showed a leftward shift and maximum active force decreased markedly. With time the length-tension curves shifted back to normal, but a decreased active force still remained at 10 weeks. Detrusor actin concentration and detrusor myosin/actin ratio were unaffected by the subtotal cystectomy. Intermediate filament protein/actin ratio showed a significant but transitory increase. We conclude that there is a remarkable recovery of detrusor muscle function after subtotal cystectomy, leading to a normalization of optimum length for active force and a net synthesis of contractile and cytoskeletal proteins. The ability to produce active force does, however, not fully recover.

journal_name

Neurourol Urodyn

authors

Frederiksen H,Sjuve R,Arner A,Uvelius B

doi

10.1002/nau.1020

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

685-97

issue

6

eissn

0733-2467

issn

1520-6777

pii

10.1002/nau.1020

journal_volume

20

pub_type

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