PT  - JOURNAL ARTICLE
AU  - Eliza G. West
AU  - Ryan Lang
AU  - Donna Sellers
AU  - Russ Chess-Williams
AU  - Catherine McDermott
TI  - Ibuprofen Decreases Spontaneous Activity and Enhances Nerve-Evoked Contractions to Minimize Mitomycin C-Induced Bladder Dysfunction
AID  - 10.1124/jpet.118.248989
DP  - 2018 Aug 01
TA  - Journal of Pharmacology and Experimental Therapeutics
PG  - 282--290
VI  - 366
IP  - 2
4099  - http://jpet.aspetjournals.org/content/366/2/282.short
4100  - http://jpet.aspetjournals.org/content/366/2/282.full
SO  - J Pharmacol Exp Ther2018 Aug 01; 366
AB  - Inflammation may play a causal role in urological side effects reported following intravesical mitomycin C (MMC). Our aim was to investigate the effects of the nonsteroidal anti-inflammatory drug ibuprofen (IBU) on the cytotoxic potency of MMC and the potential for IBU to protect against bladder dysfunction. Malignant (RT4, T24) and normal (UROtsa) urothelial lines were treated with MMC followed by ibuprofen, with cell viability and caspase-3 activity assessed. Female C57BL/6JArc mice (Saline/Control, MMC, Saline + IBU, and MMC + IBU) received intravesical treatment (1 hour) with saline or MMC (2 mg/ml), with IBU (1 mg/ml) delivered in drinking water (for 7 days). Voiding pattern analysis was conducted prior to and following (1, 3, 7 days) treatment. A whole-bladder preparation was used to assess compliance, contractile responses, and urothelial-mediator release. Ibuprofen selectively increased the cytotoxic potency of MMC and caspase-3 activity in both malignant cells lines but not in UROtsa. MMC significantly increased voiding frequency at 24 hours and 3 days, whereas administration of ibuprofen significantly reduced this effect. MMC significantly increased the frequency of spontaneous contractions from 2.3 ± 0.5 contractions/min in saline controls to 4.8 ± 0.16 contractions/min, with ibuprofen protecting against this change. Interestingly, although nerve-evoked responses were not altered by MMC, they were increased in both IBU groups. Ibuprofen improved voiding dysfunction following MMC treatment by reducing spontaneous phasic activity and enhancing nerve-mediated contractions. Ibuprofen use in bladder cancer patients may help to minimize the urological adverse effects associated with intravesical MMC.