Prostate-Specific Deletion of Cdh1 Induces Murine Prostatic Inflammation and Bladder Overactivity

Author:

Pascal Laura E1ORCID,Mizoguchi Shinsuke1,Chen Wei1,Rigatti Lora H2,Igarashi Taro1,Dhir Rajiv3,Tyagi Pradeep1,Wu Zeyu1,Yang Zhenyu1,de Groat William C4,DeFranco Donald B4,Yoshimura Naoki1,Wang Zhou145

Affiliation:

1. Department of Urology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

2. Division of Laboratory Animal Resources, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

3. Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

4. Department of Pharmacology and Chemical Biology, and University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

5. UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

Abstract

Abstract Benign prostatic hyperplasia (BPH) is an age-related debilitating prostatic disease that is frequently associated with prostatic inflammation and bothersome lower urinary tract symptoms (LUTS). Animal models have shown that formalin- and bacterial-induced prostatic inflammation can induce bladder dysfunction; however, the underlying mechanisms contributing to prostatic inflammation in BPH and bladder dysfunction are not clear. We previously reported that E-cadherin expression in BPH is downregulated in hyperplastic nodules compared with expression in adjacent normal tissues. Here, we explored the potential consequences of prostatic E-cadherin downregulation on the prostate and bladder in vivo using an inducible murine model of prostate luminal epithelial-specific deletion of Cdh1. The prostate-specific antigen (PSA)-CreERT2 transgenic mouse strain expressing tamoxifen-inducible CreERT2 recombinase driven by a 6-kb human PSA promoter/enhancer was crossed with the B6.129-Cdh1tm2Kem/J mouse to generate bigenic PSA-CreERT2/Cdh1-/- mice. Deletion of E-cadherin was induced by transient administration of tamoxifen when mice reached sexual maturity (7 weeks of age). At 21 to 23 weeks of age, the prostate, bladder, and prostatic urethra were examined histologically, and bladder function was assessed using void spot assays and cystometry. Mice with Cdh1 deletion had increased prostatic inflammation, prostatic epithelial hyperplasia, and stromal changes at 21 to 23 weeks of age, as well as changes in bladder voiding function compared with age-matched controls. Thus, loss of E-cadherin in the murine prostate could result in prostatic defects that are characteristic of BPH and LUTS, suggesting that E-cadherin downregulation could be a driving force in human BPH development and progression.

Funder

National Institutes of Health

National Institute of Diabetes and Digestive and Kidney Diseases

National Cancer Institute

American Urology Association Award

O’Brien Urology Research Center at University of Pittsburgh

UPCI Animal Facility and the Pitt Biospecimen Core

Publisher

The Endocrine Society

Subject

Endocrinology

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