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PubMed2000

[Experimental study on effect of sanmiao mixture capsules on prostate hyperplasia in mice and rats].

OBJECTIVE: To observe the effect of Sanmiao Mixture Capsules(SMC) on prostate hyperplasia in mice and rats. METHOD: The model of prostate hyperplasia was made by injecting testosterone propionate in to male mice(5 g.kg-1.d-1, 21 d) and rats(3 g.kg-1.d-1, 14 d). The treated group was administered SMC(mice: 36.3 g.kg-1 and 18.2 g.kg-1; rats: 25.2 g.kg-1 and 12.6 g.kg-1), the normal control group 1.9 g.kg-1, and the model control group NS. hours after the last administration serum tests were carried out on E2, AKP and Zn2+. Then the animals were killed, prostates taken out and weighed, index of prostate was calculated and pathological examination performed. RESULT: In the SMC treated group, the prostate weight and index were lowered(P < 0.01) the mean activation of E2 was raised, and the mean concentration of AKP and Zn2+ was inhibited (P < 0.01). CONCLUSION: SMC are helpful in checking prostate hyperplasia in mice and rats, the mechanism being probably related to the raising of activation of E2 as well as to the inhibition of concentration of AKP and Zn2+.

Acid Phosphatase↗
PubMed2005

Managing patients with lower urinary tract symptoms suggestive of benign prostatic hyperplasia.

Many men with lower urinary tract symptoms suggestive of benign prostatic hyperplasia can be managed safely and effectively by primary care providers. After a basic evaluation to exclude other diseases that may cause lower urinary tract symptoms, quantifying the degree of symptoms and bother, and perhaps making an assessment of prostate size, the primary care provider can determine which men require immediate evaluation by a urologist and which men may choose among various treatment options, including watchful waiting and various single agent or combination medication strategies. Recent information about risk factors for disease progression has also helped to inform patient decisions on which treatment option is best for the individual patient. The purpose of this review is to provide primary care providers with an approach to the management of men with lower urinary tract symptoms suggestive of benign prostatic hyperplasia.

Adrenergic alpha-Antagonists↗
PubMed1992

A randomized, placebo-controlled multicenter study of the efficacy and safety of terazosin in the treatment of benign prostatic hyperplasia.

The clinical manifestations of benign prostatic hyperplasia (BPH) are related primarily to bladder outlet obstruction resulting from enlargement of the prostate gland. Transurethral prostatectomy is the most common treatment currently offered for BPH in the United States. The primary objective of the present randomized placebo controlled multicenter study was to determine the efficacy and safety of terazosin, a selective long-acting alpha 1-blocker, for the treatment of symptomatic BPH. A total of 285 men with symptomatic BPH was randomly assigned in equal proportions to receive placebo, or 2, 5 or 10 mg. terazosin administered once daily. Of the patients 237 completed the 4-week single-blind placebo lead-in and 12-week double-blind treatment periods. The primary outcome parameters were changes in peak and mean urinary flow rates, and changes in the Boyarsky symptom scores. All terazosin treatment groups exhibited significantly greater decreases in total Boyarsky symptom score than the placebo group. The 10 mg. terazosin group exhibited significantly greater increases in peak and mean urinary flow rates than the placebo group. The improvements in symptom scores and urinary flow rates did not reach a plateau within the dose range evaluated, suggesting that further efficacy may be achieved with doses of terazosin exceeding 10 mg. This study unequivocally demonstrates the safety and efficacy of terazosin for the treatment of BPH. Selective alpha 1-blockade is likely to gain widespread acceptance for the treatment of BPH due to its safety and efficacy.

Adrenergic alpha-Antagonists↗
PubMed1997

The correlation between prostate-specific antigen and age. Analysis of prostate-specific antigen values from 4,846 Turkish men with symptomatic benign prostatic hyperplasia.

OBJECTIVE: To analyze serum prostate-specific antigen (PSA) levels of men proven to have benign prostatic hyperplasia (BPH) and to document any correlation between PSA, age and resected or enucleated prostate tissue. PATIENTS AND METHODS: Serum PSA values, age and weight of specimens of 4,846 men who underwent prostatectomy in the Ankara region between January 1, 1991, and December 24, 1995, were reviewed retrospectively. RESULTS: Serum PSA values correlated directly with age (Pearson's r = 0.45, p < 0.00001). The mean PSA values of men in each decade of age differed significantly (p < 0.0001) from all other decades. However, the correlation between the weight of the prostatectomy specimen and age or PSA did not reach statistical significance. CONCLUSION: The effect of age on PSA is evident in men with symptoms of BPH. The existence of symptomatic BPH should also be considered together with age when interpreting PSA levels.

Aged↗
PubMed2003

[Antimitogenic effect of Pygeum africanum extracts on human prostatic cancer cell lines and explants from benign prostatic hyperplasia].

OBJECTIVES: To analyze the effect of Pygeum africanum extracts on the in vitro proliferation of human prostate cells. METHODS: Prostate cancer cell lines and benign prostatic hyperplasia derived epithelial cells were cultured and treated with P. africanum extracts. The effect on cell proliferation was monitored by H3-thymidine and bromodeoxyuridine uptake and flow cytometry assays. RESULTS: The incubation with P. africanum extracts, with or without addition of amino acids, significantly and in a dose-dependent manner inhibits the proliferation of prostate cancer derived cells LnCaP, PZ-HPV-7, and CA-HPV-10. In the PZ-HPV-7 cells P. africanum extracts counteract the mitogenic action of EGF and block the transition from G1 to S in the cell cycle. P. africanum extracts also exert a potent antimitogenic action on the epithelial cells derived from benign prostatic hyperplasia explants. CONCLUSION: The ethanolic P. africanum extracts have an antimitogenic effect on prostate cancer cells and benign prostatic hyperplasia epithelial cells. Such effect is associated with the inhibition of the mitogenic action of EGF, and it is accompanied by a decrease of cells entering the S Phase of the cell cycle.

Cell Division↗
PubMed2003

Relief by botulinum toxin of voiding dysfunction due to benign prostatic hyperplasia: results of a randomized, placebo-controlled study.

OBJECTIVES: To evaluate the therapeutic role of botulinum toxin injection in men with benign prostatic hyperplasia. METHODS: Men with benign prostatic hyperplasia were enrolled in a randomized, placebo-controlled study. After a baseline evaluation, each participant received 4 mL of solution injected into the prostate gland. Patients in the control group received saline solution and patients in the treated group received 200 U of botulinum toxin A. The outcome of each group was evaluated by comparing the symptom scores, serum prostate-specific antigen concentration, prostate volume, postvoid residual urine volume, and peak urinary flow rates. RESULTS: Thirty consecutive patients were enrolled. No local complications or systemic side effects were observed in any patient. After 2 months, 13 patients in the treated group and 3 in the control group had subjective symptomatic relief (P = 0.0007). In patients who received botulinum toxin, the symptom score was reduced by 65% compared with baseline values and the serum prostate-specific antigen concentration by 51% from baseline. In patients who received saline, the symptom score and serum prostate-specific antigen concentration were not significantly changed compared with the baseline values and 1-month values. Follow-up averaged 19.6 +/- 3.8 months. CONCLUSIONS: Botulinum toxin injected into the prostate seems to be a promising approach for the treatment of benign prostatic hyperplasia. It is safe, effective, and well-tolerated. Furthermore, it is not related to the patient's willingness to complete treatment.

Aged↗
PubMed2000

Comparative study of transurethral laser prostatectomy versus transurethral electroresection for benign prostatic hyperplasia.

BACKGROUND: Transurethral resection of the prostate (TURP) is the gold standard treatment for benign prostatic hyperplasia (BPH). Recently, less invasive transurethral laser prostatectomy, such as visual laser ablation (VLAP) or interstitial laser coagulation (ILCP), have been developed. Herein, we investigated the efficacy of VLAP and ILCP compared to TURP. METHODS: A total of 80 patients with BPH were treated: 20 patients by VLAP, 30 patients by ILCP and 30 patients by TURP. All patients were followed up for 12 months after their operations. Treatment outcomes were evaluated by four different criteria: (i) the International Prostatic Symptom Score (I-PSS), (ii) the maximum flow rate (Qmax), (iii) postvoided residual urine volume before treatment and one, three, six and 12 months after treatment, and (iv) prostatic volume before operation and three and six months postoperatively. RESULTS: The I-PSS, Qmax and residual urine volume were significantly improved compared to baseline levels and the improvement continued for 12 months in the three groups: for I-PSS (P<0.001 in the VLAP group and P<0.0001 in the ILCP and TURP groups), Qmax (P<0.001 in the VLAP and ILCP groups, and P<0.0001 in the TURP group), residual urine volume (P<0.01 in the VLAP group and P<0.0001 in the ILCP and TURP groups). Significant reduction of the prostatic volume was recorded only in the ILCP and TURP groups (P<0.001). CONCLUSION: Visual laser ablation and ILCP can be good alternative treatments for BPH. Visual laser ablation provides good outcomes in patients with small-sized BPH and with risk factors such as heart disease or anticoagulation therapy.

Aged↗
PubMed1999

Expression of basic fibroblast growth factor and its receptors FGFR1 and FGFR2 in human benign prostatic hyperplasia treated with finasteride.

BACKGROUND: The development of benign prostatic hyperplasia (BPH) is an androgen-dependent process which may be mediated by a number of locally produced growth factors. One of these, the basic fibroblast growth factor (bFGF or FGF2), has a mitogenic effect on prostatic stroma. High expression levels of bFGF have been reported in BPH. FGFR1 and FGFR2 receptors, that exhibit affinity for bFGF, have been identified in normal and hyperplastic prostate. Finasteride, a 5alpha-reductase inhibitor, is an effective drug in the treatment of BPH, inducing regressive changes in the prostate of treated patients, even though its mechanisms of action are not yet completely elucidated. This study was designed to assess the effects of finasteride on the expression levels of bFGF, FGFR1, and FGFR2 in patients with BPH. METHODS: The expression levels of bFGF, FGFR1, and FGFR2 in 9 patients with prostatic hyperplasia treated with finasteride were assessed by immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR) analysis of mRNA expression and were compared with those of 9 control patients with untreated BPH. RESULTS: Immunohistochemistry showed strong bFGF immunoreactivity in the prostatic stroma of untreated patients, this being somewhat weaker in the epithelium. In treated patients, epithelial immunoreactivity was practically negative, and a considerable reduction in stromal immunoreactivity was seen. These findings were also confirmed by RT-PCR. FGFR1 showed a weak immunoreactivity in the stroma and in basal epithelial cells. FGFR1 showed a weak immunoreactivity in the stroma and in basal epithelial cells. FGFR2 exhibited strong stromal immunoreactivity, becoming weaker in the basal epithelium. No differences were seen in the expression of both receptors between the groups of treated and untreated patients. CONCLUSIONS: A marked reduction in bFGF levels is seen in BPH treated with finasteride in comparison to untreated BPH. In our opinion, finasteride may act as a negative regulator of bFGF expression, counteracting the role of bFGF in the development of BPH.

5-alpha Reductase Inhibitors↗
PubMed2003

Heterogeneity of 5 alpha-reductase gene expression in benign prostatic hyperplasia.

PURPOSE: The search for molecular markers of benign prostatic hyperplasia in general is based on an analysis of a limited number of biopsy samples. Little is known about the homogeneity of the expression of key genes in different zones of the prostate. We studied the intraprostatic (that is within the same gland) and inter-prostatic (that is between glands) variability of 5 alpha-reductase 2 (5aR2) gene expression. MATERIALS AND METHODS: Ten tissue samples removed by open prostatectomy were the source of tissue specimens. Two frozen sections were generated from each of several random biopsies taken from each adenoma immediately after enucleation, 1 of which was used for 5aR2 gene expression analysis and 1 for morphometric analysis. Results among biopsies were compared using the 5 alpha-reductase index (ratio of 5 alpha-reductase expression to an internal standard measured as electrophoretic band intensity). Morphometric composition was determined for smooth muscle, collagen, epithelium and glandular lumens. Statistical comparisons were performed with ANOVA by pairwise multiple comparison (Dunn) and Spearman's rank correlation procedure. RESULTS: For the 71 biopsies analyzed mean 5 alpha-reductase index was 0.23 +/- 0.16 and overall tissue distribution was smooth muscle 34%, collagen 35%, epithelium 14% and glandular lumens 17%. Inter-prostate and intraprostate variability in 5 alpha-reductase index was statistically significant (p = 0.004) as was the variability in stromal-to-epithelial ratio (p = 0.012). The 5 alpha-reductase index showed strong correlation with stroma (%) and negative correlation with epithelium (%). CONCLUSIONS: Benign prostatic hyperplasia is heterogeneous in terms of tissue morphometry and expression of single important genes. This finding limits the use of single biopsy based markers to predict biological behavior, and has significant impact on the ability of distinguishing longitudinal changes in tissue composition from sampling artifacts.

3-Oxo-5-alpha-Steroid 4-Dehydrogenase↗
PubMed2001

Prostate-specific antigen, prostate volume and transition zone volume in Japanese patients with histologically proven benign prostatic hyperplasia.

The relationship among age, prostate-specific antigen (PSA) level and prostate volume in Japanese patients with lower urinary tract symptoms (LUTS) and histologically proven benign prostatic hyperplasia (BPH) was examined in order to assess the utility of PSA as a predictor of prostate volume. Two hundred eighteen patients with LUTS were confirmed to have BPH by histological examination for the reason of elevated PSA and/or abnormal digital rectal examination finding. Correlation among PSA, prostate volume and transition zone volume were analyzed in patients classified into age-stratified groups. Prostate volume increased with age. Mean serum PSA increased with age, and the correlation of PSA and prostate volume was determined to be statistically significant in each cohort of age. A correlation coefficient ranged from 0.315 to 0.439. In patients with LUTS and clinical BPH, serum PSA increased with age and was related to prostate volume. PSA might be useful for therapeutic decision making for patients with symptomatic BPH.

Aged↗
PubMed1999

[Is there a rational therapy for symptomatic treatment of benign prostatic hyperplasia with phytogenic drugs? Illustrated with the example of the prostate agent from Serenoa repens (Sabal fructus)].

In summary, even when the scientific findings are subjected to a stringently critical evaluation, it must be concluded that the denigration of herbal prostate drugs to mere placebos, as occasionally occurs, is not scientifically tenable. This is especially true of the lipophilic extract of Saw Palmetto (Serenoa repens fruits) in a daily dose of 320 mg extract. All in all, far more experimental and clinical studies have been conducted with herbal prostate drugs than with "fashionable" drugs, such as alpha 1-receptor antagonists and finasteride, since with the latter only studies of recent design are available. A dogmatic evaluation of one drug group or another is certainly not in the patients' best interest. As the overview shows, both groups of substances are useful for individualized treatment of benign prostatic hyperplasia (BPH), provided that conservative pharmacological treatment of BPH is basically accepted and that the patients' quality of life is also considered. Phytomedicines have less side effects and lower costs.

5-alpha Reductase Inhibitors↗
PubMed2006

Treatment of lower urinary tract symptoms in benign prostatic hyperplasia and its impact on sexual function.

BACKGROUND: Benign prostatic hyperplasia (BPH) is a common disorder in older men and may be associated with lower urinary tract symptoms (LUTS) and sexual dysfunction. Men who present with symptomatic BPH and LUTS are at increased risk for sexual dysfunction, including erectile dysfunction (ED) and ejaculatory dysfunction (EjD). OBJECTIVE: This review describes treatment options recommended by the 2003 American Urological Association (AUA) guideline panel for the relief of LUTS associated with BPH, with a focus on the effects of each treatment on ED and EjD. METHODS: Relevant articles were identified via MEDLINE searches of all English-language articles published from January 1984 to January 2005 using the following search terms: benign prostatic hyperplasia and sexual dysfunction, lower urinary tract symptoms and sexual dysfunction, alfuzosin, doxazosin, terazosin, tamsulosin, dutasteride, finasteride, transurethral resection of prostate, erectile dysfunction, and ejaculatory dysfunction. Data on the effects of BPH treatments on sexual function were extracted from the articles and summarized. Because properly designed, adequately powered, direct-comparator studies have not yet been conducted, the AUA's report provides the most comprehensive analyses regarding the efficacy and safety of the current BPH treatment options. RESULTS: LUTS are an independent risk factor for sexual dysfunction in aging men, even after controlling for age and comorbidities. Although surgery, minimally invasive therapies, and pharmacologic therapies can all improve LUTS and the peak urinary flow rate, some can cause or exacerbate ED (incidence rates: surgery, 10%; minimally invasive therapies, 1%-3%; pharmacologic monotherapy or combination therapy, 3%-10%) and EjD (incidence rates: surgery, 65%; minimally invasive therapies, 4%-16%; pharmacologic monotherapy or combination therapy, 0%-10%). Among pharmacologic therapies for BPH, the frequency of EjD appears to be greater with tamsulosin (10%) than with other alpha(1)-blockers (0%-1%) or the 5alpha-reductase inhibitor finasteride (4%), based on data from a single-arm meta-analysis conducted by the AUA. CONCLUSION: Sexual function should be assessed and discussed with the patient when contemplating the appropriate management strategy for LUTS associated with BPH, as well as when evaluating the patient's response to treatment.

Adrenergic alpha-Antagonists↗
PubMed1998

Characterisation of inflammatory cells in benign prostatic hyperplasia.

Inflammation is a common finding in benign prostatic hyperplasia (BPH) and may be classified as acute, chronic active or chronic inactive prostatitis. The aim of the present study was to localise the different types of inflammatory cells in prostatic lesions to determine the sequence of events in the cellular reaction. We have carried out immunohistological characterisation of the inflammatory cells, using CD45RO and CD3 antibodies to detect T-lymphocytes, CD20 antibodies to detect B-lymphocytes, CD68 to detect macrophages, kappa and lambda immunoglobulin light chains, and antibodies against prostate specific antigen (PSA) and prostate specific acid phosphatase (PSAP). Macrophages accumulated in the lumen and glandular epithelial layers of damaged prostatic glands and were found in the periglandular cuff of inflammatory cells in acute and chronic active prostatitis. Lymphocytes also accumulated in large numbers in the glandular epithelial layers and around the glands, indicating an association with macrophages. B-lymphocytes were scanty, if at all present, in acute and chronic active prostatitis, but were prominent within well-organised follicle centres in chronic active prostatitis. Cells positive for light chains were few and scattered in prostatic tissue. PSA and PSAP activity was lost in recently damaged prostatic glandular epithelium and reappeared only in regenerating secretory epithelium, indicating leakage as a result of damage. We suggest that the initial response to prostatic injury is cellular, and probably related to leakage into the periglandular tissues of PSA, PSAP and other antigenic molecules normally present in prostatic secretion. Macrophages respond, followed by recruitment of T-lymphocytes which participate in the inflammatory response and accumulate around the damaged glands. B-cell activity appears to be a late event.

Acid Phosphatase↗
PubMed1993

A new patient weighted symptom score system (DAN-PSS-1). Clinical assessment of indications and outcomes of transurethral prostatectomy for uncomplicated benign prostatic hyperplasia.

A patient weighted symptom score system, the Danish Prostatic Symptom Score (DAN-PSS-1), including a disease specific self administered quality of life questionnaire, is presented. The model was evaluated pre- and postoperatively in 29 patients apparently suffering from uncomplicated benign prostatic hyperplasia. The score system is based on the severity of 12 symptoms related to bladder storage and voiding function, and three questions related to sexual function (symptom score). For each of these parameters the patient must also evaluate its influence on his daily life (bother score). In the 29 patients with uncomplicated benign prostatic hyperplasia (BPH) bother scores exceeded symptom scores for the irritative symptoms but not for the obstructive symptoms, and surprisingly the symptom score was less improved than the bother score 6 months after transurethral resection of the prostate (TUR-P). Furthermore the postvoiding dribble was worsened after the operation. We find that this model, DAN-PSS-1, assists in creating a solid base for the indication for and the evaluation of treatment of uncomplicated BPH.

Aged↗
PubMed1994

Maintenance of clinical efficacy with finasteride therapy for 24 months in patients with benign prostatic hyperplasia. The Finasteride Study Group.

BACKGROUND: Finasteride, a 5 alpha-reductase inhibitor, has been shown to have beneficial effects in the treatment of benign prostatic hyperplasia. The long-term safety and efficacy of finasteride in the treatment of benign prostatic hyperplasia was assessed. METHODS: In two multicenter, double-blind, placebo-controlled studies (North American and international), patients with symptomatic benign prostatic hyperplasia were randomly assigned to receive finasteride, 1 or 5 mg, or placebo for 1 year followed by an open-extension study in which all patients were treated with finasteride, 5 mg, regardless of original therapy. Men aged 40 to 80 years, in good physical and mental health, were eligible to enter the study. All patients were to have a maximum urinary flow rate of 15 mL/s or less with a voided volume of 150 mL or more, an enlarged prostate, and symptoms of urinary obstruction. Patients with a prostate-specific antigen level of 40 mg/mL or more or any finding suggestive of prostate cancer were excluded. RESULTS: Two hundred ninety-eight patients received finasteride, 5 mg, continuously for 24 months. At the end of 24 months of finasteride therapy, the median prostate volume was reduced by 25%, and 60% of patients had a 20% or greater reduction in prostate volume. Maximum urinary flow rate was improved by at least 2 mL/s, and symptoms were improved by approximately 3.5 points. Decreased libido and ejaculation disorders were the only drug-related adverse experiences reported in more than 1% of patients. CONCLUSION: These studies support the long-term safety and tolerability of finasteride, while demonstrating its continuing clinical efficacy in the treatment of patients with symptomatic benign prostatic hyperplasia.

Adult↗
PubMed2006

Management of benign prostate hyperplasia: an overview of alpha-adrenergic antagonist.

Benign prostate hyperplasia (BPH) is common among above 50 years age group, interfere with normal activities of lower urinary tract function and reduce the sense of well being. It can also be progressive, with a lost of urinary retention, bladder infection, bladder calculus and renal failure. Although many men with mild to moderate symptoms to well without therapy, others have gradually increasing symptoms and require medical therapy or surgery. BPH is the non-malignant, uncontrolled growth of cells in the prostate gland. This cell growth usually occurs in the tissue that surrounds the urethra as it passes through the prostate gland to the bladder. As BPH progresses, the gland constricts the urethra and obstructs the urine outflow. The bladder no longer empties completely, creating an environment in which infections, bladder stones, and chronic prostatities may develop. If left untreated, chronic obstruction can lead to the back up of urine into the ureters and compromise kidney function. In hyperplastic prostate tissue, the prostate capsule, and the bladder neck are blocked, by using alpha-adrenergic antagonist drugs; the smooth muscle tone of these structures is decreased. As a result, resistance to urinary flow through the bladder neck and the prostatic urethra decreases and urinary flow increases. A variety of alpha-adrenergic antagonists with distinct properties have been investigated as possible treatments for benign prostate hyperplasia.

Adrenergic alpha-Antagonists↗
PubMed1999

Transurethral needle ablation (TUNA). A critical review of radiofrequency thermal therapy in the management of benign prostatic hyperplasia.

Radiofrequency thermal therapy of the prostate is a new minimally invasive treatment for symptomatic benign prostatic hyperplasia (BPH). The procedure is called transurethral needle ablation (TUNA). With TUNA, the inner region of the prostate is selectively ablated with temperatures approaching 90-100 degrees C while the prostatic urothelium is preserved. The objective of this article is to discuss the basics of radiofrequency energy, instrumentation, surgical techniques, and to present an update of the clinical results as it applies to the treatment of BPH.

Animals↗
PubMed2004

Vessels in benign prostatic hyperplasia contain more binding sites for endostatin than vessels in normal prostate tissue.

OBJECTIVE: The angiogenic phenotype is an effect of a net balance of angiogenic and anti-angiogenic factors. Endostatin is one of a group of recently described matrix-derived inhibitors of tumour angiogenesis that have acquired increasing significance for tumour treatment. Endostatin's anti-angiogenic mechanism and the causes of its heterogenic influence on various tissue types have not yet been defined. METHODS: We investigated the variations in endostatin's binding behaviour to vessels in benign prostatic hyperplasia (BPH) compared to endostatin binding to vessels in normal prostate tissue. Biotinylated endostatin was used and was detected using Extravidin CY3. RESULTS: In BPH 89.12% +/- 10.72% of vessels showed endostatin binding. This was significantly more than observed for vessels in normal prostate tissue (1.66% +/- 1.66%). CONCLUSION: The strongly proliferative tissue of BPH may be a growth-limited cause of significantly more endostatin binding sites. The investigation indicates endostatin as a possible new target for BPH treatment.

Aged↗