Michael B. Chancellor

Learn More
The present study investigated the effect of inhibiting the expression of Na(v)1.8 (PN3/SNS) sodium channels by an antisense oligodeoxynucleotide (ODN) on bladder nociceptive responses induced by intravesical acetic acid infusion in rats. Animals were injected intrathecally with either Na(v)1.8 antisense or mismatch ODN. Control cystometrograms under(More)
Coordination between the urinary bladder and the urethra is mediated by multiple reflex pathways organized in the brain and spinal cord. Some reflexes promote urine storage; whereas other reflexes facilitate voiding. During bladder filling, activation of mechanoreceptor afferent nerves in the bladder wall triggers firing in the cholinergic efferent pathways(More)
The purpose of this study is to explore the feasibility of myoblasts, the precursors of muscle fibers, injected periurethrally as a potential treatment of stress urinary incontinence. We also studied myoblast injection into the bladder wall to potentially improve detrusor contractility. A myoblast cell line was transduced with adenovirus carrying the(More)
PURPOSE We investigated the effects of intrathecal application of nerve growth factor (NGF) antibodies (Ab) on bladder hyperreflexia in chronic spinalized rats. MATERIALS AND METHODS In adult female rats an intrathecal catheter was implanted at the level of the L6 to S1 spinal cord, followed by complete transection of the Th8 to 9 spinal cord. At 10 days(More)
PURPOSE We investigated the effects of intrathecal application of nerve growth factor (NGF) antibodies (NGF-Abs) and desensitization of C-fiber afferent pathways by capsaicin treatment on detrusor-sphincter dyssynergia (DSD) after spinal cord injury (SCI). MATERIALS AND METHODS In adult female rats SCI was induced by complete transection of the spinal(More)
Nerve growth factor (NGF) has been proposed as an important mediator inducing bladder overactivity under pathological conditions such as spinal cord injury, bladder outlet obstruction, or cystitis. We therefore examined the effects of chronic NGF treatment on bladder activity and the properties of bladder afferent neurons. In adult female rats, NGF (2.5(More)
PURPOSE We investigated the effects of intrathecal application of gamma-aminobutyric acid A and B receptor agonists on detrusor overactivity in spinal cord injured rats. MATERIALS AND METHODS Adult female Sprague-Dawley rats were used. At 4 weeks after Th9-10 spinal cord transection awake cystometry and recordings of external urethral sphincter(More)
Urethral closure mechanisms during passive increments in intravesicular pressure (P(ves)) were investigated using microtip transducer catheters in urethane-anesthetized female rats. After a block of reflex bladder contractions by spinal cord transection at T8-T9, abruptly raising P(ves) to 20, 40, or 60 cmH(2)O for 2 min induced a bladder pressure-dependent(More)
We examined whether replication-defective herpes simplex virus (HSV) vectors encoding the 67 kDa form of the glutamic acid decarboxylase (GAD(67)) gene product, the gamma-aminobutyric acid (GABA) synthesis enzyme, can suppress detrusor overactivity (DO) in rats with spinal cord injury (SCI). One week after spinalization, HSV vectors expressing GAD and green(More)
PURPOSE We clarified the roles of tachykinin neurokinin (NK)3 receptors in the bladder or spinal cord for control of the micturition reflex in rats. MATERIALS AND METHODS In female rats under urethane anesthesia repetitive bladder contractions were elicited by saline infusion into the bladder through intravesical bladder catheters. The effects of(More)