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Sacral neuromodulation of bladder underactivity induced by prolonged pudendal afferent firing in cats.
Shen, Bing; Wang, Jicheng; Shen, Zhijun; Jian, Jianan; Goosby, Khari; Beckel, Jonathan; de Groat, William C; Tai, Changfeng.
Afiliação
  • Shen B; Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • Wang J; Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • Shen Z; Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • Jian J; Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • Goosby K; Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • Beckel J; Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • de Groat WC; Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • Tai C; Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania.
Am J Physiol Regul Integr Comp Physiol ; 322(6): R535-R541, 2022 06 01.
Article em En | MEDLINE | ID: mdl-35319898
This study examined the effect of sacral neuromodulation on persistent bladder underactivity induced by prolonged pudendal nerve stimulation (PudNS). In 10 α-chloralose-anesthetized cats, repetitive application of 30-min PudNS induced bladder underactivity evident as an increase in bladder capacity during a cystometrogram (CMG). S1 or S2 dorsal root stimulation (15 or 30 Hz) at 1 or 1.5 times threshold intensity (T) for inducing reflex hindlimb movement (S1) or anal sphincter twitch (S2) was applied during a CMG to determine if the stimulation can reverse the bladder underactivity. Persistent (>3 h) bladder underactivity consisting of a significant increase in bladder capacity to 163.1 ± 11.3% of control was induced after repetitive (1-10 times) application of 30-min PudNS. S2 but not S1 dorsal root stimulation at 15 Hz and 1 T intensity reversed the PudNS-induced bladder underactivity by significantly reducing the large bladder capacity to 124.3 ± 12.9% of control. Other stimulation parameters were not effective. After the induction of persistent underactivity, recordings of reflex bladder activity under isovolumetric conditions revealed that S2 dorsal root stimulation consistently induced the largest bladder contraction at 15 Hz and 1 T when compared with other frequencies (5-40 Hz) or intensities (0.25-1.5 T). This study provides basic science evidence consistent with the hypothesis that abnormal pudendal afferent activity contributes to the bladder underactivity in Fowler's syndrome and that sacral neuromodulation treats this disorder by reversing the bladder inhibition induced by pudendal nerve afferent activity.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Terapia por Estimulação Elétrica / Nervo Pudendo Limite: Animals Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Terapia por Estimulação Elétrica / Nervo Pudendo Limite: Animals Idioma: En Ano de publicação: 2022 Tipo de documento: Article