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Add-on Therapy With the α-Blockers Tamsulosin and Naftopidil Improves Voiding Function by Enhancing Neuronal Activity in Prostatic Hyperplasia Rats / 대한배뇨장애요실금학회지
International Neurourology Journal ; : 20-29, 2018.
Article in English | WPRIM | ID: wpr-713688
ABSTRACT

PURPOSE:

Benign prostatic hyperplasia (BPH) impacts quality of life in men by causing lower urinary tract symptoms. α1-Adrenoceptor (α1-AR) blockers improve lower urinary tract symptoms. We investigated the efficacy of add-on therapy with α1-AR blockers on BPH rats.

METHODS:

Rats in the drug-treated groups were orally administered each drug once a day for 30 days after orchiectomy. To induce BPH, rats were castrated and testosterone (20 mg/kg) was injected subcutaneously once per day for 30 days. Cystometry was conducted to measure voiding contraction pressure and the interval contraction time, immunohistochemistry was performed to measure c-Fos and nerve growth factor (NGF) expression in the neuronal voiding centers, and nicotinamide adenine dinucleotide phosphate-diaphorase histochemistry was used to measure nitric oxide synthase (NOS) expression.

RESULTS:

Orchiectomy and testosterone injection decreased voiding contraction pressure and the interval contraction time, suggesting BPH symptoms. Voiding contraction pressure and the interval contraction time were greater in the group that received the combination treatment (tamsulosin with naftopidil) than in the tamsulosin monotherapy or naftopidil monotherapy groups. c-Fos, NGF, and NOS expression in the neuronal voiding centers was enhanced by BPH induction. c-Fos, NGF, and NOS expression was suppressed by the combination treatment (tamsulosin with naftopidil) to a greater extent than was the case for tamsulosin monotherapy or naftopidil monotherapy.

CONCLUSIONS:

Combination therapy of tamsulosin and naftopidil showed greater efficacy for the treatment of BPH than tamsulosin monotherapy or naftopidil monotherapy; therefore, combination therapy can be considered as a novel therapeutic method for BPH.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Prostatic Hyperplasia / Quality of Life / Testosterone / Immunohistochemistry / Orchiectomy / Nitric Oxide Synthase / Nerve Growth Factor / Lower Urinary Tract Symptoms / Methods / NAD Limits: Animals / Humans / Male Language: English Journal: International Neurourology Journal Year: 2018 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Prostatic Hyperplasia / Quality of Life / Testosterone / Immunohistochemistry / Orchiectomy / Nitric Oxide Synthase / Nerve Growth Factor / Lower Urinary Tract Symptoms / Methods / NAD Limits: Animals / Humans / Male Language: English Journal: International Neurourology Journal Year: 2018 Type: Article