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Zhan H, Zhang S, Li L, Chen Z, Cai Y, Huang J, Wu D, Huang B, Wu B, Liu X. Naftopidil enantiomers suppress androgen accumulation and induce cell apoptosis via the UDP-glucuronosyltransferase 2B15 in benign prostate hyperplasia. J Steroid Biochem Mol Biol 2022; 221:106117. [PMID: 35504423 DOI: 10.1016/j.jsbmb.2022.106117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/24/2022] [Accepted: 04/21/2022] [Indexed: 11/29/2022]
Abstract
Accumulation of androgens mediate alterations in prostate growth and has emerged as an essential factor in benign prostate hyperplasia (BPH). Dihydrotestosterone (DHT), the most potent natural androgen, binds to androgen receptors (AR) and regulates the prostate growth. Many inhibitors of DHT synthesis have been developed to reduce DHT levels and used in the treatment of prostate diseases. However, therapies targeting the elimination of the DHT remain limited. The DHT in prostate is metabolized by UDP-glucuronosyltransferase 2B (UGT2B) and transforms into inactive products. In this study, we analyzed and demonstrated that two enantiomers of naftopidil (NAF), an α1D/1A-adrenoceptor blocker, induced expression and activity of UGT2B in BPH rat prostate models as well as UGT2B15 in human prostate cells, BPH-1. The NAF enantiomers reduced intraprostatic and intracellular DHT levels, thus promoting cell apoptosis. Besides, assays with siRNA UGT2B15 transfection showed that UGT2B15 played an essential role in mediating the effects of the NAF enantiomers. The UGT2B15 mediated the inhibition of AR and PSA expression by NAF enantiomers. The data showed that the mechanism of upregulating UGT2B15 by the NAF enantiomers might differ from that of AR antagonists and 5α-reductase inhibitors. Together, our results demonstrated that NAF enantiomers could be potential and novel UGT2B15 regulators, which accelerated the DHT elimination and promoted apoptosis of BPH-1 cells. This study could help expand the clinical application of NAF and support the development of new therapeutic strategies targeting the elimination of androgens for the treatment of BPH and other androgen-sensitive diseases.
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Affiliation(s)
- Haoxin Zhan
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Silin Zhang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Lirong Li
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Zikai Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Yi Cai
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Junjun Huang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Dan Wu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Biyun Huang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Bo Wu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China.
| | - Xiawen Liu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China.
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Tsuboi H, Miyamori D, Ishikawa N, Ichioka H, Ikegaya H. Relationship between serum prostate-specific antigen and age in cadavers. SAGE Open Med 2020; 8:2050312120958212. [PMID: 32983523 PMCID: PMC7498970 DOI: 10.1177/2050312120958212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/20/2020] [Indexed: 11/17/2022] Open
Abstract
Objectives: An increase in number of unidentified cadavers is a growing problem. To
identify these cadavers, a simple objective method is required to estimate
cadaveric age. We examined the correlations between postmortem serum
prostate-specific antigen levels and cadaveric age to determine whether
serum prostate-specific antigen levels can be used in age estimation of
unidentified cadavers. Methods: Total serum prostate-specific antigen was measured in 140 male autopsy cases
aged from 0 to 94 years. Results: The serum prostate-specific antigen levels of cadavers correlated with age at
death to the same degree as with the age of living individuals (r = 0.393,
P < 0.01). Prostate-specific antigen levels also
correlated with prostate weight, but not with psoas muscle index and body
mass index. Cause of death did not influence postmortem serum
prostate-specific antigen levels. Conclusion: Age estimation based on prostate-specific antigen provides a simple,
objective, and rapid method to determine age at death estimation of
cadavers, and is expected to greatly contribute to the identification of
cadavers.
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Affiliation(s)
- Hajime Tsuboi
- Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Daisuke Miyamori
- Department of General Medicine, Graduate School of Medical Science, Hiroshima University, Hiroshima, Japan
| | - Noboru Ishikawa
- Department of Histology and Developmental Biology, Tokyo Dental College, Chiyoda-ku, Japan
| | - Hiroaki Ichioka
- Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroshi Ikegaya
- Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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3
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Quantitative assessment of the association between CYP17 rs743572 polymorphism and prostate cancer risk. Cell Biochem Biophys 2014; 71:983-91. [PMID: 25323563 DOI: 10.1007/s12013-014-0297-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Published data on the association between CYP17 rs743572 polymorphism and risk of PC showed inconclusive results. The aim of this study was to further estimate the pooled effect size of rs743572 polymorphism and PC progression via large-scale meta-analysis. We searched the case-control studies of rs743572 polymorphism and PC risk in PubMed, Embase, and Web of Science databases up to February 2014. Odds ratios (ORs) along with 95 % confidence intervals (CIs) were pooled by means of both fixed effects model and random effects model. A total of 38 publications consisting of 42 studies with 15,735 cases and 17,825 controls were included in this meta-analysis. Overall, no significant association was found between rs743572 polymorphism and PC risk. Stratified analyses by control source and sample size did not provide significant results. However, there was a borderline association in African population under A2A2 versus A1A2 + A1A1 genetic model (OR = 1.39, 95 % CI: 1.01-1.92, P = 0.975, I (2) = 0.0 %). Results from the current meta-analysis suggested that CYP17 rs743572 polymorphism might modify the risk of PC in the subjects of African decent.
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Dušenka R, Tomaškin R, Kliment J, Dobrota D, Dušenková S, Vilčková M, Sivoňová MK. Polymorphism of the SRD5A2 gene and the risk of prostate cancer. Mol Med Rep 2014; 10:3151-6. [PMID: 25310105 DOI: 10.3892/mmr.2014.2621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 05/02/2014] [Indexed: 11/06/2022] Open
Abstract
Androgens are actively involved in the development of the prostate gland and appear to be essential for prostate carcinogenesis. The product of the SRD5A2 gene, membrane‑bound steroid 5‑α‑reductase, type II enzyme, is key in testosterone metabolism. The present study explored the association between the SRD5A2 V89L gene polymorphism and the risk of developing prostate cancer. The study cohort consisted of 456 male Slovak patients, including 260 cases with histologically confirmed prostate cancer and 196 age‑matched controls without any clinically suspected infections of the prostate. Polymerase chain reaction-restriction fragment length polymorphism analysis was used to detect the SRD5A2 polymorphism on codon 89. Odds ratios (ORs) with corresponding 95% confidence intervals (95% CIs) for different allele variants were calculated in order to determine the association between the SRD5A2 V89L gene polymorphism and prostate cancer. The distribution of V89L variants in the control group was consistent with the Hardy‑Weinberg equilibrium (χ2 test, P=0.266) with a significant deviation in the case group (χ2 test, P=0.04). However, no association between the SRD5A2 polymorphism and an increased risk of developing prostate cancer was identified. When the wild type VV variant was used as a reference, the ORs for different allele variants ranged from 1.11 (95% CI 0.66‑1.87, P=0.70) for the LL genotype to 0.99 (95% CI 0.68‑1.46, P=0.99) for the LL + VL genotypes. No particular allele variant was identified to exhibit an increased capacity to promote the development of highly aggressive prostate cancer (Gleason ≥7) or induce carcinogenesis at an earlier onset (<65 years of age). It was confirmed that in the population studied, the SRD5A2 V89L polymorphism was not associated with the risk of prostate cancer and SRD5A2 was not shown to be a key gene involved in prostate cancer development. Published data indicate that a combination of multiple genetic changes are required for prostate cancer development, rather than a single gene change. Therefore, it was hypothesized that high-throughput genotyping may be more effective than single nucleotide polymorphism detection.
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Affiliation(s)
- Róbert Dušenka
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia
| | - Roman Tomaškin
- Department of Urology, Jessenius Faculty of Medicine and UHM, Comenius University in Bratislava, Martin 03601, Slovakia
| | - Ján Kliment
- Department of Urology, Jessenius Faculty of Medicine and UHM, Comenius University in Bratislava, Martin 03601, Slovakia
| | - Dušan Dobrota
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia
| | - Svetlana Dušenková
- Department of Urology, Jessenius Faculty of Medicine and UHM, Comenius University in Bratislava, Martin 03601, Slovakia
| | - Marta Vilčková
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia
| | - Monika Kmeť'ová Sivoňová
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin 03601, Slovakia
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Das A, Bortner JD, Aliaga CA, Baker A, Stanley A, Stanley BA, Kaag M, Richie JP, El-Bayoumy K. Changes in proteomic profiles in different prostate lobes of male rats throughout growth and development and aging stages of the life span. Prostate 2013; 73:363-75. [PMID: 22911278 PMCID: PMC3556222 DOI: 10.1002/pros.22576] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 07/24/2012] [Indexed: 11/12/2022]
Abstract
BACKGROUND Aging-related changes in important cellular pathways in the prostate may promote a permissive environment for an increased risk for prostatic disease development such as prostate cancer. Our objectives were to examine for such changes, by systematically determining the effects of growth and development and aging on proteomic profiles in different lobes of the rat prostate. METHODS Prostate lobes (dorsolateral lobe, DL and ventral lobe, VL) were obtained from male Fisher rats of various ages representing young (4 months), mature (12 months), old (18 months), and very old (24 months). Differentially expressed proteins between age groups in each lobe were identified using a proteomic approach, isobaric Tags for Relative and Absolute Quantitation (iTRAQ). Select changes in the DL and VL were verified by immunoblot analysis. RESULTS iTRAQ identified 317 proteins with high confidence. iTRAQ discovered 12 and 6 proteins significantly modulated in response to growth and development in the DL and VL, respectively, and 42 and 29 proteins significantly modulated in response to aging in the DL and VL, respectively. Proteins modulated during growth and development in the DL and VL are involved in a variety of biological processes including cell communication and development, whereas proteins modulated during aging were predominantly related to antioxidant activity and immunity. Immunoblot analysis verified age-related changes for α-1 antitrypsin, annexin A1, hypoxia up-regulated protein 1, and 78 kDa glucose-regulated protein. CONCLUSIONS Aging results in changes in numerous prostatic proteins and pathways which are mainly linked to inflammation and may lead to prostatic disease development.
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Affiliation(s)
- Arunangshu Das
- Department of Biochemistry and Molecular Biology, Penn State College of Medicine, Hershey, PA 17033
- CORRESPONDING AUTHOR ADDRESS: Department of Biochemistry and Molecular Biology, Penn State College of Medicine, Hershey, PA 17033, TELEPHONE NUMBER: 717-531-1005, FAX NUMBER: 717-531-0002, and/or
| | - James D. Bortner
- Department of Biochemistry and Molecular Biology, Penn State College of Medicine, Hershey, PA 17033
| | - Cesar A. Aliaga
- Department of Biochemistry and Molecular Biology, Penn State College of Medicine, Hershey, PA 17033
| | - Aaron Baker
- Department of Biochemistry and Molecular Biology, Penn State College of Medicine, Hershey, PA 17033
| | - Anne Stanley
- Mass Spectrometry Core, Penn State College of Medicine, Hershey, PA 17033
| | - Bruce A. Stanley
- Mass Spectrometry Core, Penn State College of Medicine, Hershey, PA 17033
| | - Mathew Kaag
- Division of Urology, Penn State College of Medicine, Hershey, PA 17033
| | - John P. Richie
- Department of Public Health Sciences, Penn State College of Medicine, Hershey, PA 17033
| | - Karam El-Bayoumy
- Department of Biochemistry and Molecular Biology, Penn State College of Medicine, Hershey, PA 17033
- CORRESPONDING AUTHOR ADDRESS: Department of Biochemistry and Molecular Biology, Penn State College of Medicine, Hershey, PA 17033, TELEPHONE NUMBER: 717-531-1005, FAX NUMBER: 717-531-0002, and/or
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Effect of CYP17 and PSA gene polymorphisms on prostate cancer risk and circulating PSA levels in the Slovak population. Mol Biol Rep 2012; 39:7871-80. [PMID: 22528335 DOI: 10.1007/s11033-012-1631-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 04/16/2012] [Indexed: 01/05/2023]
Abstract
Cytochrome P-450c17α (CYP17) and prostate-specific antigen (PSA) genes, which are involved in the androgen metabolism cascade, have been studied as possible candidates for genetic influences on prostate cancer development. Contradictory results prompted us to evaluate the frequencies of polymorphisms in the CYP17 and PSA genes as well as the association between these genetic variants and serum PSA levels in prostate cancer patients and men routinely screened for prostate cancer with PSA in the Slovak male population. The CYP17 and PSA polymorphisms were determined by the PCR-RFLP analysis in 197 Caucasian prostate cancer patients and 256 Caucasian controls. We did not find any association between the CYP17 and PSA genotypes and prostate cancer risk overall, or by grade. Also the total serum PSA levels in the cases with the AG or AA genotype were not significantly higher than in the men with the GG genotype (P > 0.05). Our study did not provide support for the hypothesized relationship between CYP17 and PSA gene polymorphisms and prostate cancer in the Slovak male population.
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7
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Pradidarcheep W, Wallner C, Dabhoiwala NF, Lamers WH. Anatomy and histology of the lower urinary tract. Handb Exp Pharmacol 2011:117-148. [PMID: 21290225 DOI: 10.1007/978-3-642-16499-6_7] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The function of the lower urinary tract is basically storage of urine in the bladder and the at-will periodic evacuation of the stored urine. Urinary incontinence is one of the most common lower urinary tract disorders in adults, but especially in the elderly female. The urethra, its sphincters, and the pelvic floor are key structures in the achievement of continence, but their basic anatomy is little known and, to some extent, still incompletely understood. Because questions with respect to continence arise from human morbidity, but are often investigated in rodent animal models, we present findings in human and rodent anatomy and histology. Differences between males and females in the role that the pelvic floor plays in the maintenance of continence are described. Furthermore, we briefly describe the embryologic origin of ureters, bladder, and urethra, because the developmental origin of structures such as the vesicoureteral junction, the bladder trigone, and the penile urethra are often invoked to explain (clinical) observations. As the human pelvic floor has acquired features in evolution that are typical for a species with bipedal movement, we also compare the pelvic floor of humans with that of rodents to better understand the rodent (or any other quadruped, for that matter) as an experimental model species. The general conclusion is that the "Bauplan" is well conserved, even though its common features are sometimes difficult to discern.
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Affiliation(s)
- Wisuit Pradidarcheep
- AMC Liver Center, Academic Medical Center, University of Amsterdam, Meibergdreef 69-71, 1105 BK, Amsterdam, The Netherlands
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8
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Lam YW, Tam NNC, Evans JE, Green KM, Zhang X, Ho SM. Differential proteomics in the aging Noble rat ventral prostate. Proteomics 2008; 8:2750-63. [PMID: 18546156 DOI: 10.1002/pmic.200700986] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Incidence of prostatic diseases increases dramatically with age which may be related to a decline in androgen support. However, the key mechanisms underlying prostate aging remain unclear. In the present study, we investigated the aging process in the ventral prostate (VP) of Noble rats by identifying differentially expressed prostate proteins between 3- and 16-month-old animals using ICAT and MS. In total, 472 proteins were identified with less than a 1% false positive rate, among which 34 were determined to have a greater than two-fold increase or 1.7-fold decrease in expression in the aged VPs versus their younger counterparts. The majority of the differentially expressed proteins identified have not been previously reported to be associated with prostate aging, and they fall into specific functional categories, including oxidative stress/detoxification, chaperones, protein biosynthesis, vesicle transport, and intracellular trafficking. The expression of GST, ferritin, clusterin, kininogen, oxygen regulated protein 150, spermidine synthase, ADP ribosylation factor, and cyclophilin B was verified by Western blot analyses on samples used for the ICAT study, as well as on those obtained from an independent group of animals comprised of three age groups. To the best of our knowledge, this is the first study on the proteome of the aging rat prostate.
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Affiliation(s)
- Ying Wai Lam
- Department of Environmental Health, Division of Environmental Genetics and Molecular Toxicology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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9
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Fernández Arjona M, Pereira Sanz I. [Benign prostatic hyperplasia: a highly prevalent disease in the elderly]. Rev Esp Geriatr Gerontol 2008; 43:44-51. [PMID: 18684386 DOI: 10.1016/s0211-139x(08)71148-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The present review aims to provide an overview of benign prostatic hyperplasia (BPH), which has a remarkably high prevalence. The various theories of the aetiology of the disease are discussed, with special emphasis on those that concern the influence of growth factors. Questions related to the physiopathology of BPH are briefly summarized, since many symptoms apparently related to the disease may be caused by ageing or by interacting factors other than prostatism. The most common clinical manifestations, with symptoms divided into irritative and obstructive, as well as the currently available diagnostic procedures, are described. Finally, the therapeutic options are discussed, with special reference to KTP and Holmiun laser, which will drastically change treatment in the future.
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Bostwick DG, Meiers I. Diagnosis of prostatic carcinoma after therapy. Arch Pathol Lab Med 2007; 131:360-71. [PMID: 17516739 DOI: 10.5858/2007-131-360-dopcat] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2006] [Indexed: 11/06/2022]
Abstract
CONTEXT Prostate cancer is the most common cancer of men in the United States and is third only to lung and colon cancer as a cause of cancer death. In 2006, 27,350 Americans will die of prostate cancer, and 234,460 new cases will be diagnosed. Treatment changes in the benign and cancerous prostate create diagnostic challenges in pathologic interpretation, particularly in needle biopsy specimens and in evaluation of extraprostatic metastases. OBJECTIVE To summarize therapy-related pathologic findings in the prostate with emphasis on recognition of treated adenocarcinoma. DATA SOURCES Extensive review of published literature and the authors' experience. CONCLUSIONS Following therapy for prostate cancer, it is critical that the clinician provide the pertinent history of androgen deprivation or radiation therapy to assist the pathologist in rendering the correct diagnosis.
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Affiliation(s)
- David G Bostwick
- Bostwick Laboratories, 4355 Innslake Dr, Glen Allen, VA 23060, USA.
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11
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Man YG, Zhao C, Chen X. A subset of prostate basal cells lacks the expression of corresponding phenotypic markers. Pathol Res Pract 2006; 202:651-62. [PMID: 16842934 DOI: 10.1016/j.prp.2006.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2005] [Accepted: 05/19/2006] [Indexed: 11/18/2022]
Abstract
Immunohistochemical staining for cytokeratin (CK) 34ssE12 has been routinely used to elucidate prostate basal cells for differentiation between non-invasive and invasive lesions. Our previous studies, however, revealed that some morphologically distinct basal cells observed on H&E-stained sections completely lacked CK34ssE12 expression. Our current study attempted to assess whether these basal cells would also lack the expression of other phenotypic markers, and whether basal cell alterations would affect the proliferation status of the associated tumor cells. Consecutive sections from prostate tumors with large basal cell clusters that were morphologically distinct in H&E sections but were completely negative for CK 34ssE12 were morphologically and immunohistochemically assessed with a panel of basal cell phenotypic and other markers. In addition to CK 34ssE12, these basal cells also completely lacked the expression of other phenotypic markers, including CK5, CK14, p63, and maspin, in contrast to adjacent basal cells, which were strongly positive for these markers. Tumors surrounded by basal cell layers that lack the expression of basal cell phenotypic markers showed a significantly higher rate of cell proliferation and mast cell infiltration than their counterparts. These findings suggest that basal cells might be targets of a variety of pathological alterations, which could significantly impact biological presentations of associated tumor cells.
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Affiliation(s)
- Yan-gao Man
- Department of Gynecologic and Breast Pathology, Armed Forces Institute of Pathology and American Registry of Pathology, Washington DC 20306-6000, USA.
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12
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Iczkowski KA, Qiu J, Qian J, Somerville MC, Rittmaster RS, Andriole GL, Bostwick DG. The dual 5-alpha-reductase inhibitor dutasteride induces atrophic changes and decreases relative cancer volume in human prostate. Urology 2005; 65:76-82. [PMID: 15667867 DOI: 10.1016/j.urology.2004.08.042] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2004] [Accepted: 08/25/2004] [Indexed: 10/25/2022]
Abstract
OBJECTIVES To perform the first evaluation of the effects of the 5-alpha-reductase inhibitor class of drugs on cancer histopathologic features at radical prostatectomy in a placebo-controlled multicenter trial. METHODS We analyzed prostatectomy slides in a blinded manner from 17 men treated with dutasteride, an inhibitor of types 1 and 2 isoenzymes of 5-alpha-reductase, and 18 men treated with placebo for 5 to 11 weeks before radical prostatectomy. The histopathologic features of benign epithelium, high-grade prostatic intraepithelial neoplasia, and cancer were recorded, and the treatment effect was scored. Digital imaging analysis was used to measure the stroma/epithelium ratio and epithelial height, as well as the nuclear area in cancer. RESULTS In benign epithelium, treatment caused distinctive cytoarchitectural changes of atrophy and a decrease in the epithelial height (P = 0.053). The peripheral zone showed the most marked response to treatment. In cancer tissue, the tumor volume was significantly lower in the dutasteride-treated men than in the placebo-treated men (mean 15% versus 24%, respectively, P = 0.025), the percentage of atrophic epithelium was increased (P = 0.041), and the stroma/gland ratio was doubled (P = 0.046). The treatment alteration effect score was doubled (P = 0.055) and did not correlate with any Gleason score changes. CONCLUSIONS After short-term dutasteride treatment, benign epithelium showed involution and epithelial shrinkage, and prostate cancer tissue demonstrated a decrease in epithelium relative to stroma. These findings indicate that dutasteride induces significant phenotypic alterations in both the benign and the neoplastic prostate, supportive of a chemopreventive or chemoactive role.
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Affiliation(s)
- Kenneth A Iczkowski
- Department of Pathology and Laboratory Medicine, Veterans Affairs Medical Center, Gainesville, Florida 32608-1197, USA.
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13
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Lau KM, Tam NNC, Thompson C, Cheng RYS, Leung YK, Ho SM. Age-associated changes in histology and gene-expression profile in the rat ventral prostate. J Transl Med 2003; 83:743-57. [PMID: 12746483 DOI: 10.1097/01.lab.0000069519.06988.24] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The incidence of prostate diseases rises dramatically with age in men, yet little is understood of the mechanisms underlying prostatic senescence and its contribution to disease development in the gland. In Noble rats, aging of the ventral prostate (VP) is characterized morphologically by widespread atrophy of acini, increased accumulation of concretions in glandular lumen, infiltration of inflammatory cells, and focal epithelial atypia. We used a cDNA microarray containing 2388 known transcripts, together with the Tyramide Amplification System and t statistics, to identify differentially expressed genes in the VPs of young (3 months old) and old (16 months old) rats. A total of 78 VP genes were found to be differentially expressed by the two groups; in old rats, 65 VP genes (83%) showed reduced expression and 13 genes (17%) showed increased expression compared with young animals. The age-dependent underexpressed genes fell into several functional clusters: those involved in amino-acid metabolism, protein synthesis, protein secretion and degradation, vesicle/membrane trafficking, energy metabolism, signal transduction, spermidine and spermine syntheses, and cellular defense against stress. The overexpressed genes included iduronate 2-sulfatase, HLA class I locus C heavy chain, membrane cofactor protein of the complement system, TRPM-2, cadherin-associated protein-related, and X-CGD. Post hoc analyses confirmed a progressive decline in the expression of ribophorin II and BiP and a gradual increase in the expression of TRPM-2 in rat VPs as animals aged from 3 to 19 months old. In conclusion, the observed widespread declines in expression of genes involved in protein synthesis, protein fidelity maintenance, anabolism, growth inhibition, and energy metabolism, together with increased expression of genes implicated in cell survival in the VPs of senescent rats, may help explain the susceptibility of the prostates of elderly men to development of disease.
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Affiliation(s)
- Kin-Mang Lau
- Department of Surgery, Division of Urology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
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14
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Matsumoto AM. Andropause: clinical implications of the decline in serum testosterone levels with aging in men. J Gerontol A Biol Sci Med Sci 2002; 57:M76-99. [PMID: 11818427 DOI: 10.1093/gerona/57.2.m76] [Citation(s) in RCA: 274] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Alvin M Matsumoto
- Department of Medicine, Division of Gerontology and Geriatric Medicine, Population Center for Research in Reproduction, University of Washington School of Medicine, Seattle, WA, USA.
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15
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Affiliation(s)
- S E Prinsloo
- Department of Urology, University of Pretoria, South Africa
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Dunsmuir WD, Hrouda D, Kirby RS. Malignant changes in the prostate with ageing. BRITISH JOURNAL OF UROLOGY 1998; 82 Suppl 1:47-58. [PMID: 9883262 DOI: 10.1046/j.1464-410x.1998.0820s1047.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- W D Dunsmuir
- Department of Urology, St George's Hospital NHS Trust, London, UK
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Abstract
OBJECTIVES The importance of the expression of granin A (GRN-A, chromogranin-A) has become appreciated in the neuroendocrine differentiation of prostate cancer. We studied the expression of GRN-A in prostate cancer using serum immunoassay and tissue immunohistology procedures for this protein in order to define the clinical value of its measurements. METHODS GRN-A production was measured by immunoassay in serum samples from patients with prostate cancer. Immunohistology procedures were used to assess GRN-A expression in paraffin-embedded prostate tissue samples. Serum and tumor findings were evaluated according to the patient's clinical status in studies by us and others. RESULTS These studies demonstrated that GRN-A can serve as a prostate cancer serum and tumor marker with clinical value for both diagnosis and prognosis. Serum GRN-A was increased in early- and late-stage disease. Elevated serum GRN-A levels identified some patients with prostate cancer who did not have elevated serum prostate-specific antigen levels. In addition to their diagnostic value, increased serum GRN-A concentrations had prognostic value. CONCLUSIONS Our own studies as well as those of others support the clinical potential of GRN-A as a marker for early, progressive, and recurrent prostate cancer. This demonstration of clinical utility notwithstanding, further studies are needed to clearly define the clinical value of GRN-A as a serum and tumor marker for this common cancer.
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Affiliation(s)
- L J Deftos
- The Department of Medicine, University of California, San Diego 92161, USA.
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