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Induction of Invasive Transitional Cell Bladder Carcinoma in Immune Intact Human MUC1 Transgenic Mice: A Model for Immunotherapy Development
Published on: October 30, 2013
Interleukin-8 is essential for normal urothelial cell survival
Stephanie Tseng-Rogenski1, Monica Liebert
1Department of Urology, University of Michigan, Ann Arbor, Michigan 48109, USA.
American Journal of Physiology. Renal Physiology
|June 19, 2009
Summary
Interleukin-8 (IL-8) is vital for normal urothelial cell growth and survival. Lower IL-8 levels in the bladder may contribute to interstitial cystitis, impacting urothelial cell function.
Area of Science:
- Cell Biology
- Urology
- Immunology
Background:
- Interleukin-8 (IL-8; CXCL8) is known to regulate various cellular functions.
- Its specific role in normal human urothelial cell biology requires further elucidation.
Purpose of the Study:
- To investigate the function of IL-8 in normal human urothelial cells.
- To determine IL-8's role in urothelial cell growth, survival, and its potential involvement in interstitial cystitis.
Main Methods:
- Normal human urothelial cells were treated with recombinant human IL-8.
- IL-8 expression was inhibited using small inhibitory RNA (siRNA).
- Cell viability and receptor involvement (CXCR1, CXCR2) were assessed.
Main Results:
- Exogenous IL-8 promoted urothelial cell growth via the Akt pathway.
- IL-8 siRNA-induced cell death was rescued by recombinant IL-8.
- The rescue effect was mediated by the IL-8 receptor CXCR1, not CXCR2.
Conclusions:
- IL-8 acts as a crucial growth and survival factor for normal urothelial cells.
- IL-8 signaling through CXCR1 is essential for urothelial cell homeostasis.
- Reduced IL-8 expression in the bladder may be implicated in interstitial cystitis pathophysiology.
