Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Prostates of rats with induced partial bladder outlet obstruction and the effect of Eviprostat on those changes

ABSTRACT: Prostatic inflammation plays a role in the progression of benign prostatic hyperplasia (BPH). Eviprostat is an antiinflammatory and antioxidant phytotherapeutic agent widely used to treat lower urinary tract symptoms in BPH. However, because Eviprostat is a mixture of compounds from multiple natural sources, its mechanism of action has been difficult to investigate. In this study, we used oligonucleotide microarrays to identify changes in gene expression that occur in the prostate of rats with surgically induced partial bladder outlet obstruction and the effect of Eviprostat on those changes. Male rats were divided into four groups of five or six animals each. The rats in groups 1 and 2 underwent a sham operation. Five days after the sham operation, group 1 was treated twice a day with vehicle (0.1% (w/v) Tween 80; sham/vehicle group) and group 2 was treated twice a day with 18 mg/kg Eviprostat (36 mg/kg daily; sham/Eviprostat group). The rats in groups 3 and 4 underwent surgical partial bladder outlet obstruction. Briefly, with the rat in the supine position, a midline suprapubic incision was made and the bilateral prostate was retracted to expose the neck of the bladder and the urethra, care being taken not to damage the bladder. The loose connective tissue at the base of the bladder was dissected away from the proximal urethra. A rubber ring was cut open and placed around the proximal urethra, and a 4-0 silk ligature was tied around the rubber ring. From the day after the operation, group 3 was treated twice a day for five days with vehicle (operated/vehicle group) and group 4 was treated twice a day for five days with 18 mg/kg Eviprostat (36 mg/kg daily; operated/Eviprostat group). On the sixth day, 2 h after the last administration, the rats were sacrificed and the prostate was rapidly removed.

ORGANISM(S): Rattus norvegicus

SUBMITTER: Junichi Yano

PROVIDER: E-GEOD-16063 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Eviprostat suppresses proinflammatory gene expression in the prostate of rats with partial bladder-outlet obstruction: a genome-wide DNA microarray analysis.

Tagaya Mitsuhiro M Oka Michiko M Ueda Makoto M Takagaki Kazuchika K Tanaka Mitsushi M Ohgi Tadaaki T Yano Junichi J

Cytokine 20090717 3

Prostatic inflammation plays a role in the progression of benign prostatic hyperplasia (BPH). Eviprostat is an antioxidant, antiinflammatory phytotherapeutic agent widely used to treat lower urinary tract symptoms in BPH. Because Eviprostat is a mixture of compounds from multiple natural sources, however, its mechanism of action has been difficult to investigate. Here, we describe the use of oligonucleotide microarrays to investigate changes in gene expression in the prostate of rats with surgic ...[more]

PMID: 19616448

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Project description:Scope: As a result of population ageing, the number of Alzheimer’s disease (AD) patients has rapidly increased. There are many hypothesises on the pathogenesis of AD, but its detailed molecular mechanism is still unknown, and so no effective preventive or therapeutic measures have been established. Some reports showed a decrease in levels of norepinephrine (NE) has been suspected to be involved in the decline of cognitive function in AD patients and NE concentrations were decreased in postmortem AD patient brains. Tyr-Trp was identified as being the most effective dipeptide in enhancing norepinephrine (NE) synthesis and metabolism. And Tyr-Trp treatment ameliorated the short-term memory dysfunction in AD model mice caused by amyloid beta (Aβ) 25-35. So, the purpose of this study was to investigate the preventive or/and protective effects of Tyr-Trp administration in AD model mice. Methods and results: ddY mice were fed normal diet. After 7 days of feeding, mice were divided into 3 groups (n=10 per group) as follows: the sham group, which received saline administration and distilled water injection; the Aβ group, which received saline administration and Aβ peptides 25–35 injection; and the Aβ+YW group, which received Tyr-Trp administration and Aβ peptides 25–35 injection. Tyr-Trp was orally administered Tyr-Trp (100 mg kg-1 day-1, twice a day), starting 7 days before Aβ peptides injection. The other groups received oral administration of saline (5 mL kg-1). After Aβ peptides injection or sham operation, each groups received every oral administration. DAN microarray showed that Tyrosine hydroxylase, dopa decarboxylase and dopamine receptor D2 mRNA expressions which were downregulated in Aβ group comparing with sham group were upregulated in Aβ+YW group comparing with Aβ group. In addition, quinoid dihydropteridine reductase mRNA expression which wasn’t changed in Aβ group comparing with sham group was upregulated in Aβ+YW group comparing with Aβ group. Conclusions: These results suggest that Tyr-Trp administration might ameliorate the short-term memory dysfunction in AD model mice because of enhancing norepinephrine (NE) synthesis and metabolism through metabolism of both Tyr and Trp.

Dataset Information

Prostates of rats with induced partial bladder outlet obstruction and the effect of Eviprostat on those changes

Publications

Eviprostat suppresses proinflammatory gene expression in the prostate of rats with partial bladder-outlet obstruction: a genome-wide DNA microarray analysis.

Similar Datasets

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