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Trapé J, Fernández-Galán E, Auge JM, Carbonell-Prat M, Filella X, Miró-Cañís S, González-Fernández C. Factors influencing blood tumor marker concentrations in the absence of neoplasia. Tumour Biol 2024; 46:S35-S63. [PMID: 38517826 DOI: 10.3233/tub-220023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024] Open
Abstract
BACKGROUND Tumor markers (TMs) are a heterogeneous group of molecules used in the diagnosis, prognosis and follow-up of cancer patients. During neoplastic differentiation, cells can either directly synthesize or induce the synthesis of TMs, and the release of these molecules into the bloodstream allows their quantification in biological fluids. Although very small concentrations of TMs are usually present in the serum or plasma of healthy subjects, increased concentrations may also be found in the presence of benign diseases or due to technical interference, producing false positive results. MATERIAL AND METHODS AND RESULTS Our review analyses the causes of false positives described between January 1970 to February 2023 for the TMs most frequently used in clinical practice: α-fetoprotein (AFP), β2-microglobulin (β2-M), cancer antigen 15-3 (CA 15-3), cancer antigen CA 19-9 (CA 19-9), cancer antigen CA 72-4 (CA 72-4), cancer antigen 125 (CA 125), carcinoembryonic antigen (CEA), chromogranin A (CgA), choriogonadotropin (hCG), cytokeratin 19 fragment (CYFRA 21-1), neuron-specific enolase (NSE), human epididymis protein 4 (HE4), serum HER2 (sHER2), squamous cell carcinoma antigen (SCCA), protein induced by vitamin K absence-II (PIVKA-II), Pro-gastrin-releasing peptide (Pro-GRP), prostate-specific antigen (PSA), Protein S-100 (S-100) and thyroglobulin (Tg). A total of 247 references were included. CONCLUSIONS A better understanding of pathophysiological processes and other conditions that affect the concentration of TMs might improve the interpretation of results and their clinical application.
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Affiliation(s)
- Jaume Trapé
- Department of Laboratory Medicine, Althaia Xarxa Assistencial Universitària de Manresa, Manresa, Catalonia, Spain
- Tissue Repair and Regeneration Laboratory, Institut de Recerca i Innovació en Ciències de la Vida i de la Salut a la Catalunya Central, Barcelona, Spain
- Faculty of Medicine, University of Vic - Central University of Catalonia, Vic, Spain
| | - Esther Fernández-Galán
- Department of Biochemistry and Molecular Genetics - Hospital Clinic de Barcelona, Barcelona, Spain
| | - Josep Maria Auge
- Department of Biochemistry and Molecular Genetics - Hospital Clinic de Barcelona, Barcelona, Spain
| | | | - Xavier Filella
- Department of Biochemistry and Molecular Genetics - Hospital Clinic de Barcelona, Barcelona, Spain
| | - Sílvia Miró-Cañís
- Laboratori d'Anàlisis Clíniques, CLILAB Diagnòstics, Vilafranca del Penedès, Spain
| | - Carolina González-Fernández
- Department of Laboratory Medicine, Althaia Xarxa Assistencial Universitària de Manresa, Manresa, Catalonia, Spain
- Gastrointestinal Oncology, Endoscopy and Surgery Research Group, Institut de Recerca i Innovació en Ciències de la Vida i de la Salut a la Catalunya Central, Barcelona, Spain
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Chen C, Aluksanasuwan S, Somsuan K. Expression of anoctamin 7 (ANO7) is associated with poor prognosis and mucin 2 (MUC2) in colon adenocarcinoma: a study based on TCGA data. Genomics Inform 2023; 21:e46. [PMID: 38224713 PMCID: PMC10788358 DOI: 10.5808/gi.23071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 09/22/2023] [Accepted: 11/21/2023] [Indexed: 01/17/2024] Open
Abstract
Colon adenocarcinoma (COAD) is the predominant type of colorectal cancer. Early diagnosis and treatment can significantly improve the prognosis of COAD patients. Anoctamin 7 (ANO7), an anion channel protein, has been implicated in prostate cancer and other types of cancer. In this study, we analyzed the expression of ANO7 and its correlation with clinicopathological characteristics among COAD patients using the Gene Expression Profiling Interactive Analysis 2 (GEPIA2) and the University of Alabama at Birmingham CANcer (UALCAN) databases. The GEPIA2, Kaplan-Meier plotter, and the Survival Genie platform were employed for survival analysis. The co-expression network and potential function of ANO7 in COAD were analyzed using GeneFriends, the Database for Annotation, Visualization and Integrated Discovery (DAVID), GeneMANIA, and Pathway Studio. Our data analysis revealed a significant reduction in ANO7 expression levels within COAD tissues compared to normal tissues. Additionally, ANO7 expression was found to be associated with race and histological subtype. The COAD patients exhibiting low ANO7 expression had lower survival rates compared to those with high ANO7 expression. The genes correlated with ANO7 were significantly enriched in proteolysis and mucin type O-glycan biosynthesis pathway. Furthermore, ANO7 demonstrated a direct interaction and a positive co-expression correlation with mucin 2 (MUC2). In conclusion, our findings suggest that ANO7 might serve as a potential prognostic biomarker and potentially plays a role in proteolysis and mucin biosynthesis in the context of COAD.
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Affiliation(s)
- Chen Chen
- Medical Science Graduate Program, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand
- Cancer and Immunology Research Unit (CIRU), Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Siripat Aluksanasuwan
- Cancer and Immunology Research Unit (CIRU), Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Keerakarn Somsuan
- Cancer and Immunology Research Unit (CIRU), Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
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3
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Tomalty D, Giovannetti O, Hannan J, Komisaruk B, Goldstein S, Goldstein I, Adams M. Should We Call It a Prostate? A Review of the Female Periurethral Glandular Tissue Morphology, Histochemistry, Nomenclature, and Role in Iatrogenic Sexual Dysfunction. Sex Med Rev 2022; 10:183-194. [PMID: 35074318 DOI: 10.1016/j.sxmr.2021.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
Abstract
INTRODUCTION There is evidence of glandular tissue within the region of the anterior vaginal wall-female periurethral tissue (AVW-FPT) having similar morphology and immunohistochemistry to the prostate in men and having physiological roles in the female sexual response (FSR). Whether this tissue should be called a prostate in women has been debated. Iatrogenic injury to structures of the AVW-FPT, including these glands and the associated neurovasculature, could be a cause of female sexual dysfunction (FSD). OBJECTIVES To consolidate the current knowledge concerning the glandular tissue surrounding the urethra in women, evidence was reviewed to address whether: (i) these glands comprise the prostate in women, (ii) they have specific functions in the FSR, and (iii) injury to the AVW-FPT and prostate has sexual dysfunction as a likely outcome. METHODS A literature review was conducted using keywords including female prostate, Skene's/paraurethral glands, periurethral tissue, Gräfenberg (G)-spot, female ejaculation, mid-urethral sling (MUS), and sexual dysfunction. RESULTS Histological and immunohistochemical studies of the glandular tissue surrounding the urethra support the existence of prostate in women. Evidence suggests this tissue may have physiologically and clinically relevant autonomic and sensory innervation, and during sexual arousal may contribute to secretions involved in ejaculation and orgasm. Gaps in knowledge relating to the functional anatomy, physiological roles, and embryological origins of this tissue have impeded the acceptance of a prostate in women. Injury to the innervation, vasculature, and/or glandular tissue within the surgical field of MUS implantation suggests iatrogenic sexual dysfunction is plausible. CONCLUSIONS Continuing to advance our understanding of the morphology, histochemistry, and physiologic capacity of this glandular tissue will clarify the characterization of this tissue as the "prostate" involved in the FSR, and its role in FSD following surgical injury. Tomalty D, Giovannetti O, Hannan J, et al. Should We Call It a Prostate? A Review of the Female Periurethral Glandular Tissue Morphology, Histochemistry, Nomenclature, and Role in Iatrogenic Sexual Dysfunction. Sex Med Rev 2021;XX:XXX-XXX.
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Affiliation(s)
- Diane Tomalty
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada.
| | - Olivia Giovannetti
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Johanna Hannan
- Department of Physiology, East Carolina University, Greenville, NC, USA
| | - Barry Komisaruk
- Department of Psychology, Rutgers University, Newark, NJ, USA
| | | | - Irwin Goldstein
- San Diego Sexual Medicine, San Diego, CA, USA; Alvarado Hospital, San Diego, CA, USA
| | - Michael Adams
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
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4
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Kunjiappan S, Pavadai P, Vellaichamy S, Ram Kumar Pandian S, Ravishankar V, Palanisamy P, Govindaraj S, Srinivasan G, Premanand A, Sankaranarayanan M, Theivendren P. Surface receptor‐mediated targeted drug delivery systems for enhanced cancer treatment: A state‐of‐the‐art review. Drug Dev Res 2020; 82:309-340. [DOI: 10.1002/ddr.21758] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 10/16/2020] [Accepted: 10/23/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Selvaraj Kunjiappan
- Department of Biotechnology Kalasalingam Academy of Research and Education Krishnankoil Tamilnadu India
| | - Parasuraman Pavadai
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy M.S. Ramaiah University of Applied Sciences Bengaluru Karnataka India
| | - Sivakumar Vellaichamy
- Department of Pharmaceutics Arulmigu Kalasalingam College of Pharmacy Krishnankoil Tamilnadu India
| | | | | | - Ponnusamy Palanisamy
- School of Mechanical Engineering Vellore Institute of Technology Vellore Tamilnadu India
| | - Saravanan Govindaraj
- Department of Pharmaceutical Chemistry MNR College of Pharmacy Sangareddy Telangana India
| | - Gowshiki Srinivasan
- Department of Biotechnology Kalasalingam Academy of Research and Education Krishnankoil Tamilnadu India
| | - Adhvitha Premanand
- Department of Biotechnology Kalasalingam Academy of Research and Education Krishnankoil Tamilnadu India
| | | | - Panneerselvam Theivendren
- Department of Pharmaceutical Chemistry Swamy Vivekananda College of Pharmacy Elayampalayam, Namakkal Tamilnadu India
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5
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Andrews JR, Ahmed ME, Motterle G, Albadri ST, Haloi R, Karnes RJ, Kwon ED, Price KA. A Rare Case of Prostate-Specific Antigen-Producing Metastatic Parotid Adenocarcinoma Developing Androgen Receptor Resistance. Mayo Clin Proc Innov Qual Outcomes 2020; 4:601-607. [PMID: 33083709 PMCID: PMC7557195 DOI: 10.1016/j.mayocpiqo.2020.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A 62-year-old man presented with a rising serum concentration of prostate-specific antigen (PSA) to 53.3 ng/mL (to convert to μg/L, multiply by 1) and a PSA doubling time of 2.6 months. Computed tomography, fluorodeoxyglucose–positron emission tomography, and C-11 choline positron emission tomography demonstrated a parotid mass with innumerable lytic bone lesions and diffuse metastatic disease to the neck and mediastinal lymph nodes. Mediastinal lymph node biopsy revealed salivary ductal adenocarcinoma that produced PSA and demonstrated androgen receptor sensitivity. The patient had a prolonged clinical benefit to first- and second-line hormone therapy, and his PSA levels correlated with treatment response, development of hormone resistance, and progression. In summary, urologists, pathologists, and primary care providers should be aware that a rising PSA level in the setting of a head and neck mass in a patient without a history of prostate cancer does not constitute a diagnosis of metastatic prostate adenocarcinoma and that other primary tumors should be considered and a broader imaging and pathologic evaluation is indicated.
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Affiliation(s)
| | | | | | - Sam T Albadri
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN
| | - Rimki Haloi
- Department of Urology, Mayo Clinic, Rochester, MN
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6
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Aloysius H, Hu L. Synthesis and evaluation of new peptide-linked doxorubicin conjugates as prodrugs activated by prostate-specific antigen. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02573-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Synthesis and evaluation of new 4-peptidamido-2-fluorobenzyl phosphoramide mustard conjugates as prodrugs activated by prostate-specific antigen. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02572-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Musavi H, Fattah A, Abbasi M. Differential Expression of the KLK2 and KLK3 Genes in Peripheral Blood and Tissues Samples of Iranian Patients with Prostate Cancer. MEDICAL LABORATORY JOURNAL 2019. [DOI: 10.29252/mlj.13.3.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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9
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van der Toom EE, Axelrod HD, de la Rosette JJ, de Reijke TM, Pienta KJ, Valkenburg KC. Prostate-specific markers to identify rare prostate cancer cells in liquid biopsies. Nat Rev Urol 2019; 16:7-22. [PMID: 30479377 DOI: 10.1038/s41585-018-0119-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Despite improvements in early detection and advances in treatment, patients with prostate cancer continue to die from their disease. Minimal residual disease after primary definitive treatment can lead to relapse and distant metastases, and increasing evidence suggests that circulating tumour cells (CTCs) and bone marrow-derived disseminated tumour cells (BM-DTCs) can offer clinically relevant biological insights into prostate cancer dissemination and metastasis. Using epithelial markers to accurately detect CTCs and BM-DTCs is associated with difficulties, and prostate-specific markers are needed for the detection of these cells using rare cell assays. Putative prostate-specific markers have been identified, and an optimized strategy for staining rare cancer cells from liquid biopsies using these markers is required. The ideal prostate-specific marker will be expressed on every CTC or BM-DTC throughout disease progression (giving high sensitivity) and will not be expressed on non-prostate-cancer cells in the sample (giving high specificity). Some markers might not be specific enough to the prostate to be used as individual markers of prostate cancer cells, whereas others could be truly prostate-specific and would make ideal markers for use in rare cell assays. The goal of future studies is to use sensitive and specific prostate markers to consistently and reliably identify rare cancer cells.
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Affiliation(s)
| | - Haley D Axelrod
- The James Buchanan Brady Urological Institute, Baltimore, MD, USA.,Graduate Program in Cellular and Molecular Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | | | - Kenneth J Pienta
- The James Buchanan Brady Urological Institute, Baltimore, MD, USA
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10
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Jedinak A, Loughlin KR, Moses MA. Approaches to the discovery of non-invasive urinary biomarkers of prostate cancer. Oncotarget 2018; 9:32534-32550. [PMID: 30197761 PMCID: PMC6126692 DOI: 10.18632/oncotarget.25946] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/23/2018] [Indexed: 02/07/2023] Open
Abstract
Prostate cancer (PCa) continues to be one of the most common cancers in men worldwide. Prostate specific antigen (PSA) measured in blood has been used for decades as an aid for physicians to detect the presence of prostate cancer. However, the PSA test has limited sensitivity and specificity, leading to unnecessary biopsies, overdiagnosis and overtreatment of patients. For these reasons, there is an urgent need for more accurate PCa biomarkers that can detect PCa with high sensitivity and specificity. Urine is a unique source of potential protein biomarkers that can be measured in a non-invasive way. This review comprehensively summarizes state of the art approaches used in the discovery and validation of urinary biomarkers for PCa. Numerous strategies are currently being used in the discovery of urinary biomarkers for prostate cancer including gel-based separation techniques, mass spectrometry, activity-based proteomic assays and software approaches. Antibody-based approaches remain preferred method for validation of candidate biomarkers with rapidly advancing multiplex immunoassays and MS-based targeted approaches. In the last decade, there has been a dramatic acceleration in the development of new techniques and approaches in the discovery of protein biomarkers for prostate cancer including computational, statistical and data mining methods. Many urinary-based protein biomarkers have been identified and have shown significant promise in initial studies. Examples of these potential biomarkers and the methods utilized in their discovery are also discussed in this review.
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Affiliation(s)
- Andrej Jedinak
- Vascular Biology Program and Department of Surgery, Boston Children's Hospital, Boston, MA, USA.,Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Kevin R Loughlin
- Department of Surgery, Harvard Medical School, Boston, MA, USA.,Department of Urology, Brigham and Women's Hospital, Boston, MA, USA
| | - Marsha A Moses
- Vascular Biology Program and Department of Surgery, Boston Children's Hospital, Boston, MA, USA.,Department of Surgery, Harvard Medical School, Boston, MA, USA
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11
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Free/Total Serum Prostate-Specific Antigen Ratio in Women with Colorectal Cancer Has Prognostic Significance. J Gastrointest Cancer 2017; 48:8-12. [PMID: 27447478 DOI: 10.1007/s12029-016-9859-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE The presence of prostate-specific antigen (PSA) in colon cancer tissues has been shown, but its clinical significance has not been known yet in colorectal cancer patients. We investigated the prognostic significance of percent free PSA value (free PSA/total PSA × 100) in female patients with colorectal cancer. METHODS The serum concentrations of total and free PSA were measured by solid-phase two-site immunoradiometric assay in 184 patients. RESULTS The cancer-specific survival (CSS) of patients with percent free PSA value ≥35 was significantly better compared to that of patients with percent free PSA value <35 (CSS rate was 82.9 and 55.5 %, respectively; log-rank x2 = 8135, p = 0.004). In multivariate Cox analysis, this percent free PSA threshold value had independent prognostic significance (relative risk 0.27, 95 % confidence interval 0.11-0.64, p = 0.003). CONCLUSION Percent free PSA value, calculated by serum total and free PSA levels, has prognostic significance in women with colorectal cancer. The studies with larger patient series, utilizing ultrasensitive PSA assays whose lowest detection limit is lower, are required for a clearer understanding of this issue.
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12
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Musrap N, Diamandis EP. Prostate-Specific Antigen as a Marker of Hyperandrogenism in Women and Its Implications for Antidoping. Clin Chem 2016; 62:1066-74. [DOI: 10.1373/clinchem.2016.256198] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Accepted: 04/29/2016] [Indexed: 11/06/2022]
Abstract
Abstract
BACKGROUND
Since its discovery in the 1970s, prostate-specific antigen (PSA) has become widely known as a biomarker of prostate cancer in males but has often been overlooked in female malignancies. Although the serum concentration of PSA differs between men and women by about 1000-fold, studies have suggested that PSA concentrations drastically differ among healthy females and those who exhibit increased androgen production.
CONTENT
There have been reports of increased PSA expression in women exhibiting hyperandrogenic states, including polycystic ovary syndrome and hirsutism, as well as marked increases in a subset of breast cancer patients. These findings have not only revealed the remarkable diagnostic potential of PSA in a diverse range of clinical conditions but also point to its potential of becoming a useful biomarker of steroid hormone doping among female athletes. Recently, highly sensitive assays that can measure PSA at low limits of detection have been developed, which will aid in the discrimination of PSA between these different conditions.
SUMMARY
The overall aim of this review is to revisit the expression of PSA in hormonally-regulated tissues and in female malignancies, and to demonstrate how the regulation of PSA permits its use in antidoping initiatives.
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Affiliation(s)
- Natasha Musrap
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Eleftherios P Diamandis
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Department of Clinical Biochemistry, University Health Network, Toronto, Ontario, Canada
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13
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Does Rigid Cystoscopy Affect the Total Serum Prostate-Specific Antigen Levels? Indian J Surg 2016; 77:365-9. [PMID: 26730027 DOI: 10.1007/s12262-013-0844-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Accepted: 01/16/2013] [Indexed: 10/27/2022] Open
Abstract
In the present study, we aim to prospectively evaluate the effect of performing rigid cystoscopy (CPE) in urological patients on the total serum prostate-specific antigen (PSA) levels. The study design was a prospective observational study. After giving informed consent, urological patients visiting the outpatient clinic of our institution from November 2010 to March 2012 who satisfied our protocol entry/exclusion criteria were recruited into the present study. Blood sample was withdrawn 1 h prior to CPE for serum PSA estimation, and CPE was performed with a 17-Fr rigid cystoscope. Blood was again withdrawn at 1 and 24 h after CPE for serum PSA estimation. The study used paired samples test (two tailed) for statistical analysis. A total of 50 patients with mean age of 60 years underwent CPE. The baseline, 1-h, and 24-h post CPE mean serum PSA levels were 1.98 ± 2.25 (0.02-12.33), 2.90 ± 2.81 (0.3-14.26), and 3.04 ± 2.95 (0.2-15.03) ng/dl, respectively. The paired samples test (two tailed) revealed that the rise in the baseline PSA versus 1-h PSA and baseline PSA versus 24-h PSA was highly significant at P < 0.001 and P < 0.002, respectively; however, the 1-h PSA versus 24-h PSA rise was not so significant (P < 0.043). The present study demonstrated that rigid cystoscopy may be associated with a variable rise in the serum PSA that may persist for a period of up to or beyond 24 h. Thus, we believe that the history of recent cystoscopy must be taken into consideration while interpreting the serum PSA value in the routine urological setting, as this will reduce unnecessary prostate biopsies in patients with an elevated serum PSA. Therefore, it may be advisable to wait for 24-48 h before withdrawing blood for serum PSA estimation in patients with history of CPE in the previous 24-48 h.
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14
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Aloysius H, Hu L. Improving the Specificity of the Prostate-Specific Antigen Substrate Glutaryl-Hyp-Ala-Ser-Chg-Gln as a Promoiety. Chem Biol Drug Des 2015; 86:837-48. [DOI: 10.1111/cbdd.12559] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 02/05/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Herve Aloysius
- Department of Medicinal Chemistry; Ernest Mario School of Pharmacy, Rutgers; The State University of New Jersey; Piscataway NJ 08854 USA
| | - Longqin Hu
- Department of Medicinal Chemistry; Ernest Mario School of Pharmacy, Rutgers; The State University of New Jersey; Piscataway NJ 08854 USA
- School of Pharmaceutical Sciences; Shanxi Medical University; Taiyuan 030001 China
- The Cancer Institute of New Jersey; New Brunswick NJ 08901 USA
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15
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Furubayashi N, Negishi T, Hirata Y, Taguchi K, Shimokawa M, Nakamura M. Positive resection margins may not reflect the true margin in patients undergoing radical prostatectomy. Oncol Lett 2014; 8:2237-2242. [PMID: 25295112 PMCID: PMC4186613 DOI: 10.3892/ol.2014.2491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Accepted: 07/25/2014] [Indexed: 11/11/2022] Open
Abstract
The aim of the present study was to evaluate the hypothesis that a positive resection margin (RM1) of an excised specimen may not reflect the true margin in patients that have undergone radical prostatectomy (RP). Between September 2003 and March 2011, 370 Japanese patients underwent an antegrade RP at the National Kyushu Cancer Center (Fukuoka, Japan), however, 95 of these patients were excluded from the study due to a history of receiving hormonal therapy or insufficient preoperative clinical data. The incidence of biochemical failure (BCF) was evaluated using multivariate analysis, which revealed that the preoperative prostate-specific antigen (PSA) level, pathological tumor stage, RP Gleason score and a PSA nadir <0.008 ng/ml were significant predictors (P=0.0065, 0.0006, 0.0002 and <0.0001, respectively). By contrast, an RM1 was not found to be a significant predictor of BCF, while the parameter with the highest hazard ratio (HR) was a PSA nadir <0.008 ng/ml (HR, 10.055; 95% confidence interval, 5.005–20.200). From the 56 cases that were RM1, 41 cases (73.2%) exhibited a PSA nadir <0.008 ng/ml. There were 42 cases (75.0%) in which only one site was identified to be RM1; among these cases, no significant difference was observed between a PSA level <0.008 ng/ml and a PSA level ≥0.008 ng/ml at the RM1 site (apex, P=0.1460; base, P=0.1384; anterior, P=0.3870; and posterolateral, P=0.5040). There were 14 cases (25.0%) in which multiple sites were RM1; these cases were classified by the number of sites that were RM1 (one vs. multiple) and no significant difference was observed between a PSA level <0.008 ng/ml and a PSA level ≥0.008 ng/ml (P=0.6090). Based on these results, an RM1 of an excised specimen may not reflect the true margin in patients that are treated with RP, specifically in cases where the PSA level is identified to decrease to below the postoperative measurement threshold value (PSA nadir <0.008 ng/ml).
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Affiliation(s)
- Nobuki Furubayashi
- Department of Urology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
| | - Takahito Negishi
- Department of Urology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
| | - Yu Hirata
- Department of Urology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
| | - Kenichi Taguchi
- Department of Pathology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
| | - Mototsugu Shimokawa
- Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
| | - Motonobu Nakamura
- Department of Urology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
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16
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Morgan TM, Meng MV, Cooperberg MR, Cowan JE, Weinberg V, Carroll PR, Lin DW. A risk-adjusted definition of biochemical recurrence after radical prostatectomy. Prostate Cancer Prostatic Dis 2014; 17:174-9. [DOI: 10.1038/pcan.2014.5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/07/2014] [Accepted: 01/12/2014] [Indexed: 11/09/2022]
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17
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Abstract
This article updates advances in prostate cancer screening based on prostate-specific antigen, its derivatives, and human kallikrein markers. Many men are diagnosed with indolent disease not requiring treatment. Although there is evidence of a survival benefit from screening, the numbers needed to screen and treat remain high. There is risk of exposing men to the side effects of treatment for nonthreatening disease. A screening test is needed with sufficiently good performance characteristics to detect disease at an early stage so treatment may be offered with curative intent, while reducing the number of negative or unnecessary biopsies.
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Affiliation(s)
- Richard J Bryant
- Nuffield Department of Surgical Sciences, John Radcliffe Hospital, University of Oxford, Headley Way, Headington, Oxford OX3 9DU, UK
| | - Hans Lilja
- Nuffield Department of Surgical Sciences, John Radcliffe Hospital, University of Oxford, Headley Way, Headington, Oxford OX3 9DU, UK; Department of Laboratory Medicine, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue (Mailbox 213), New York, NY 10065, USA; Department of Surgery (Urology), Memorial Sloan-Kettering Cancer Center, 1275 York Avenue (Mailbox 213), New York, NY 10065, USA; Department of Medicine (GU-Oncology), Memorial Sloan-Kettering Cancer Center, 1275 York Avenue (Mailbox 213), New York, NY 10065, USA.
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Chadha KC, Miller A, Nair BB, Schwartz SA, Trump DL, Underwood W. New serum biomarkers for prostate cancer diagnosis. CLINICAL CANCER INVESTIGATION JOURNAL 2014; 3:72-79. [PMID: 25593898 DOI: 10.4103/2278-0513.125802] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Prostate-specific antigen (PSA) is currently used as a biomarker for diagnosis and management of prostate cancer (CaP). However, PSA typically lacks the sensitivity and specificity desired of a diagnostic marker. OBJECTIVE The goal of this study was to identify an additional biomarker or a panel of biomarkers that is more sensitive and specific than PSA in differentiating benign versus malignant prostate disease and/or localized CaP versus metastatic CaP. METHODS Concurrent measurements of circulating interleukin-8 (IL-8), Tumor necrosis factor-α (TNF-α) and soluble tumor necrosis factor-α receptors 1 (sTNFR1) were obtained from four groups of men: (1) Controls (2) with elevated prostate-specific antigen with a negative prostate biopsy (elPSA_negBx) (3) with clinically localized CaP and (4) with castration resistant prostate cancer. RESULTS TNF-α Area under the receiver operating characteristic curve (AUC = 0.93) and sTNFR1 (AUC = 0.97) were strong predictors of elPSA_negBx (vs. CaP). The best predictor of elPSA_negBx vs CaP was sTNFR1 and IL-8 combined (AUC = 0.997). The strongest single predictors of localized versus metastatic CaP were TNF-α (AUC = 0.992) and PSA (AUC = 0.963) levels. CONCLUSIONS The specificity and sensitivity of a PSA-based CaP diagnosis can be significantly enhanced by concurrent serum measurements of IL-8, TNF-α and sTNFR1. In view of the concerns about the ability of PSA to distinguish clinically relevant CaP from indolent disease, assessment of these biomarkers in the larger cohort is warranted.
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Affiliation(s)
- Kailash C Chadha
- Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, University at Buffalo, Buffalo, NY, USA
| | - Austin Miller
- Department of Biostatistics and Bioinformatics, Roswell Park Cancer Institute, University at Buffalo, Buffalo, NY, USA
| | - Bindukumar B Nair
- Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, University at Buffalo, Buffalo, NY, USA ; Department of Medicine, Division of Allergy/Immunology and Rheumatology, University at Buffalo, Buffalo, NY, USA
| | - Stanley A Schwartz
- Department of Medicine, Division of Allergy/Immunology and Rheumatology, University at Buffalo, Buffalo, NY, USA
| | - Donald L Trump
- Department of Medicine, Roswell Park Cancer Institute, University at Buffalo, Buffalo, NY, USA
| | - Willie Underwood
- Department of Urologic Oncology, Roswell Park Cancer Institute, University at Buffalo, Buffalo, NY, USA
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Identification of colorectal cancer related genes with mRMR and shortest path in protein-protein interaction network. PLoS One 2012; 7:e33393. [PMID: 22496748 PMCID: PMC3319543 DOI: 10.1371/journal.pone.0033393] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 02/13/2012] [Indexed: 11/19/2022] Open
Abstract
One of the most important and challenging problems in biomedicine and genomics is how to identify the disease genes. In this study, we developed a computational method to identify colorectal cancer-related genes based on (i) the gene expression profiles, and (ii) the shortest path analysis of functional protein association networks. The former has been used to select differentially expressed genes as disease genes for quite a long time, while the latter has been widely used to study the mechanism of diseases. With the existing protein-protein interaction data from STRING (Search Tool for the Retrieval of Interacting Genes), a weighted functional protein association network was constructed. By means of the mRMR (Maximum Relevance Minimum Redundancy) approach, six genes were identified that can distinguish the colorectal tumors and normal adjacent colonic tissues from their gene expression profiles. Meanwhile, according to the shortest path approach, we further found an additional 35 genes, of which some have been reported to be relevant to colorectal cancer and some are very likely to be relevant to it. Interestingly, the genes we identified from both the gene expression profiles and the functional protein association network have more cancer genes than the genes identified from the gene expression profiles alone. Besides, these genes also had greater functional similarity with the reported colorectal cancer genes than the genes identified from the gene expression profiles alone. All these indicate that our method as presented in this paper is quite promising. The method may become a useful tool, or at least plays a complementary role to the existing method, for identifying colorectal cancer genes. It has not escaped our notice that the method can be applied to identify the genes of other diseases as well.
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Chadha KC, Nair BB, Chakravarthi S, Zhou R, Godoy A, Mohler JL, Aalinkeel R, Schwartz SA, Smith GJ. Enzymatic activity of free-prostate-specific antigen (f-PSA) is not required for some of its physiological activities. Prostate 2011; 71:1680-90. [PMID: 21446007 PMCID: PMC4498389 DOI: 10.1002/pros.21385] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 02/24/2011] [Indexed: 11/08/2022]
Abstract
BACKGROUND Prostate specific antigen (PSA) is a well known biomarker for early diagnosis and management of prostate cancer. Furthermore, PSA has been documented to have anti-angiogenic and anti-tumorigenic activities in both in vitro and in vivo studies. However, little is known about the molecular mechanism(s) involved in regulation of these processes, in particular the role of the serine-protease enzymatic activity of PSA. METHODS Enzymatic activity of PSA isolated directly from seminal plasma was inhibited specifically (>95%) by incubation with zinc2+ . Human umbilical vein endothelial cells (HUVEC) were utilized to compare/contrast the physiological effects of enzymatically active versus inactive PSA. RESULTS Equimolar concentrations of enzymatically active PSA and PSA enzymatically inactivated by incubation with Zn2+ had similar physiological effects on HUVEC, including inhibiting the gene expression of pro-angiogenic growth factors, like VEGF and bFGF, and up-regulation of expression of the anti-angiogenic growth factor IFN-γ; suppression of mRNA expression for markers of blood vessel development, like FAK, FLT, KDR, TWIST-1; P-38; inhibition of endothelial tube formation in the in vitro Matrigel Tube Formation Assay; and inhibition of endothelial cell invasion and migration properties. DISCUSSION Our data provides compelling evidence that the transcriptional regulatory and the anti-angiogenic activities of human PSA are independent of the innate enzymatic activity.
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Affiliation(s)
- Kailash C Chadha
- Department of Molecular & Cellular Biology, Roswell Park Cancer Institute, Buffalo, New York 14263, USA.
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Trapé J, Filella X, Alsina-Donadeu M, Juan-Pereira L, Bosch-Ferrer Á, Rigo-Bonnin R. Increased plasma concentrations of tumour markers in the absence of neoplasia. Clin Chem Lab Med 2011; 49:1605-20. [PMID: 21892908 DOI: 10.1515/cclm.2011.694] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tumour markers are a very heterogeneous group of molecules that are generally found in very small concentrations in the plasma and serum of healthy individuals. In the process of neoplastic differentiation the cell can synthesize, release, or induce synthesis of other cells, thus increasing their concentration in plasma and serum. These substances may also increase their plasma concentration in patients without cancer due to processes that increase the release or reduce catabolism, and so give rise to false positives. An understanding of the main physiopathological processes that increase the concentrations of these substances could improve our interpretation of tumour markers and their clinical application. In this study we review the physiopathological processes that may increase the plasma concentrations of tumour markers. We performed a bibliography review in PubMed, searching for causes of false positives for the following tumour markers: α-Fetoprotein, CA 125, CA 15-3, CA 19-9, CA 72-4, carcinoembryonic antigen, CYFRA 21-1, squamous cell carcinoma, prostatic specific antigen, β(2)-microglobulin, choriogonadotropin (β chain), chromogranin A, neuron specific enolase, HER2-neu, progastrin releasing peptide, S-100, and thyroglobulin. The results favour the use of tests which can identify pathological processes that may increase tumour marker concentrations.
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Affiliation(s)
- Jaume Trapé
- Laboratory Medicine, Biological Diagnosis Department, Manresa Althaia Xarxa Assistencial de Manresa, Manresa, Catalonia, Spain.
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Radowicki S, Kunicki M. Prostate specific antigen in women with menstrual disturbances and fibrocystic mastopathy. J Endocrinol Invest 2009; 32:821-4. [PMID: 19602918 DOI: 10.1007/bf03345752] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The objective of this study was to evaluate serum prostate specific antigen (PSA) levels in women with menstrual disturbances and fibrocystic mastopathy. A total of 114 women with fibrocystic breast disease with cysts <10 mm (group I), 62 with macrocysts >10 mm (group II) and 46 healthy volunteers, who served as control subjects, were recruited for this prospective study. Each patient underwent complete gynecological examination and had performed sonography of the breasts. Moreover menstrual pattern, serum levels of free and total PSA, LH, FSH, SHBG, PRL, estradiol, progesterone, TSH, T4, as well as serum total testosterone, were evaluated in each subject. We compared serum free and total PSA levels between women with different menstrual pattern within groups of women with micro- and macrocysts. We also evaluated correlations between serum free and total PSA and hormonal/descriptive variables. We found that, in group II, women with regular menses and polymenorrhea revealed significantly higher serum free PSA than women with oligomenorrhea and secondary amenorrhea. Moreover, we found a positive correlation between serum total testosterone and total PSA in the control group and between progesterone and total PSA in group II. Our data show that serum free PSA is increased in women with regular menstrual cycles and polymenorrhea. This later relationship refers to women with macrocysts. Further studies are required to clarify the relationships between serum PSA and menstrual disturbances in women with mastopathy.
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Affiliation(s)
- S Radowicki
- Department of Gynecological Endocrinology, Medical University of Warsaw, Karowa Street 2, 00-350 Warsaw, Poland
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Chen Y, Lim BK, Hashim OH. Different altered stage correlative expression of high abundance acute-phase proteins in sera of patients with epithelial ovarian carcinoma. J Hematol Oncol 2009; 2:37. [PMID: 19709441 PMCID: PMC2739531 DOI: 10.1186/1756-8722-2-37] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Accepted: 08/27/2009] [Indexed: 11/10/2022] Open
Abstract
Background The general enhanced expression of α1-antichymotrypsin (ACT), clusterin (CLU), α1-antitrypsin (AAT), haptoglobin β-chain (HAP), and leucine rich glycoprotein (LRG) in the sera of patients with epithelial ovarian carcinoma (EOCa) was recently reported. In the present study, we compared the expression of the serum acute-phase proteins (APPs) in the patients according to their stages of cancer. Results Different altered stage correlative expression of the high abundance serum APPs was demonstrated in sera of the patients studied. While the expression of ACT, HAP and AAT appeared to demonstrate positive correlation with the three initial stages of the cancer, inverse correlation was apparently detected in the expression of LRG and CLU. For patients who were diagnosed with stage IV of the cancer, expression of the serum APPs did not conform to the altered progression changes. Conclusion Our results highlight the potential prognostic significance of selective high abundance serum APPs in patients with EOCa.
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Affiliation(s)
- Yeng Chen
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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Bindukumar B, Schwartz S, Aalinkeel R, Mahajan S, Lieberman A, Chadha K. Proteomic profiling of the effect of prostate-specific antigen on prostate cancer cells. Prostate 2008; 68:1531-45. [PMID: 18646040 DOI: 10.1002/pros.20811] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND Prostate-specific antigen (PSA) is a well-known biomarker for diagnosis and management of prostate cancer. PSA has been shown to have anti-angiogenic activity. We used the emerging proteomic research technology to identify proteins in prostate cancer cells whose expression is regulated by enzymatically active PSA. METHODS Differentially expressed proteins in PC-3M cells treated with PSA were analyzed by 2D-DIGE analysis and identified by HPLC-MS/MS and SEQUEST data mining. Biological network analysis was carried out using MetaCore integrated software designed for functional analysis of experimental data. Gene expression data for several regulated proteins were confirmed by real-time, quantitative PCR. RESULTS A total of 41 proteins were significantly (P < 0.05) changed in abundance in PC-3M cells in response to PSA treatment. Proteins from 26 gel-spots were identified. Many of the down-regulated proteins including N8 gene product long isoform, laminin receptor, vimentin, DJ-1 and Hsp60 are known to be involved in tumor progression. DISCUSSION The relevance of the level of PSA in prostate tissue microenvironment and its relation to tumor progression has not been elucidated. PSA has been shown to down-regulate several proteins that are known to have involvement in tumor progression. This suggests that normal physiological levels of PSA in prostate tissue microenvironment may be promoting non-angiogenic environment and its down-regulation may promote tumor growth.
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Affiliation(s)
- B Bindukumar
- Department of Molecular & Cellular Biology, Roswell Park Cancer Research Institute, Buffalo, New York 14263, USA
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Bahrami A, Truong LD, Ro JY. Undifferentiated tumor: true identity by immunohistochemistry. Arch Pathol Lab Med 2008; 132:326-48. [PMID: 18318577 DOI: 10.5858/2008-132-326-uttibi] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2007] [Indexed: 11/06/2022]
Abstract
CONTEXT "Undifferentiated tumor" refers to a heterogeneous group of neoplasms with little or no evidence of differentiation on routine light microscopic morphology. OBJECTIVE To identify the true identity of undifferentiated tumors by immunohistochemical analysis. DATA SOURCES Review of the pertinent literature and the authors' experience. CONCLUSIONS For treatment and prognostic evaluation, it is crucial to delineate whether an undifferentiated neoplasm is epithelial, mesenchymal, melanocytic, or hematopoietic in nature. Application of a screening panel to demonstrate the expression of markers of major lineages is fundamental for determination of the broad category of neoplasia. Because poorly differentiated carcinomas and in particular sarcomatoid carcinomas are known to be heterogeneous in their antigen expression, several epithelial markers in combination may be required to establish the carcinomatous nature of tumor. A diagnostic misinterpretation as a consequence of occasional aberrant or unexpected antigen expression is best avoided by using a broad panel that includes both antibodies that are anticipated to be positive and those that are expected to be negative. In this treatise, the immunohistochemical dissection of undifferentiated tumors on the basis of their morphologic features is outlined, supplemented with algorithmic immunohistochemical analysis for each morphologic category of small round cell tumors, carcinomatous tumors, sarcomatous (or sarcoma-like) tumors, and tumors with histologically overlapping features, including hematolymphoid malignancies, melanoma, and sarcomas with epithelioid appearance. The utility of several organ- or tissue-specific markers in the context of undifferentiated tumors is reviewed.
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Affiliation(s)
- Armita Bahrami
- Department of Pathology, Baylor College of Medicine, Houston, TX, USA
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Graeser R, Chung DE, Esser N, Moor S, Schächtele C, Unger C, Kratz F. Synthesis and biological evaluation of an albumin-binding prodrug of doxorubicin that is cleaved by prostate-specific antigen (PSA) in a PSA-positive orthotopic prostate carcinoma model (LNCaP). Int J Cancer 2007; 122:1145-54. [DOI: 10.1002/ijc.23050] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Radowicki S, Kunicki M, Bandurska-Stankiewicz E. Prostate-specific antigen in the serum of women with benign breast disease. Eur J Obstet Gynecol Reprod Biol 2007; 138:212-6. [PMID: 17850950 DOI: 10.1016/j.ejogrb.2007.05.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2006] [Revised: 04/22/2007] [Accepted: 05/18/2007] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Fibrocystic mastopathy is the most common benign breast disease. Available evidence suggests that the presence of breast cysts increases the risk of breast cancer. The purpose of the study was to evaluate and compare the detection rate of total and free prostate-specific antigen (PSA) in the serum samples of healthy women and in those of women with cystic mastopathy. Moreover, we compared PSA concentrations in the serum samples of the study groups. STUDY DESIGN The study population included 114 women with fibrocystic breast disease, with cysts measuring <10mm (Group I) and 62 with macrocysts measuring >10 mm (Group II). Forty-six healthy volunteers were enrolled in the study as a control group. We analyzed the frequency of the detection level and the mean serum concentrations of total and free PSA in women with mastopathy and in healthy participants. Total PSA (PSA-T) and free PSA (PSA-Free) were measured by an ultrasensitive fluoroimmunometric DELFIA assay (Prostatus PSA Free/Total Wallac, Turku, Finland). The detection limits was 0.01 ng/ml. RESULTS Our results showed the statistical significance of the fact that the detection rate of free and total PSA was higher in all women with mastopathy (Group I with II) than it was in the control group. There were no differences between Group I and Group II regarding the detection rate of the two forms of antigen and between the control group and Group II in the detection rate of total PSA. We also demonstrated that the mean concentration levels of both free and total PSA were significantly higher in the serum of women with mastopathy than in the control group. CONCLUSION These findings suggest that women with mastopathy, regardless of the size of the cysts, produce and release more PSA into the serum than women without breast pathology. The PSA may be a new marker for the assessment of benign breast disease.
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Affiliation(s)
- Stanisław Radowicki
- Department of Gynaecological Endocrinology, Warsaw Medical University, Karowa Street 2, 00-950 Warsaw, Poland
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Wu P, Koistinen H, Finne P, Zhang W, Zhu L, Leinonen J, Stenman U. Advances in Prostate‐Specific Antigen Testing. Adv Clin Chem 2006; 41:231-261. [DOI: 10.1016/s0065-2423(05)41007-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Estévez Muñoz J, Sagredo Pérez J, Carreño Freire P, Aguilar Hurtado E. PSA y patología extraprostática. Semergen 2005. [DOI: 10.1016/s1138-3593(05)72929-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tcherniuk SO, Chroboczek J, Balakirev MY. Construction of tumor-specific toxins using ubiquitin fusion technique. Mol Ther 2005; 11:196-204. [PMID: 15668131 DOI: 10.1016/j.ymthe.2004.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2004] [Accepted: 10/16/2004] [Indexed: 01/11/2023] Open
Abstract
The use of cytotoxic agents to eliminate cancer cells is limited because of their nonselective toxicity and unwanted side effects. One of the strategies to overcome these limitations is to use latent prodrugs that become toxic in situ after being enzymatically activated in target cells. In this work we describe a method for producing tumor-specific toxins by using a ubiquitin fusion technique. The method is illustrated by the production of recombinant toxins by in-frame fusion of ubiquitin to saporin, a toxin from the plant Saponaria officinalis. Ubiquitin-fused toxins were rapidly degraded via the ubiquitin-proteasome system, significantly reducing their nonspecific toxicity. The insertion of the protease-cleavage sequence between ubiquitin and saporin led to the removal of ubiquitin by the protease and resulted in protease-dependent stabilization of the toxin. We engineered toxins that can be stabilized by specific proteases such as deubiquitinating enzymes and prostate-specific antigen (PSA). Both constructs were activated in vitro and in cultured cells by the appropriate enzyme. Processing by the protease resulted in a greater than 10-fold increase in the toxicity of these constructs. Importantly, the PSA-cleavable toxin was able to kill specifically the PSA-producing prostate cancer cells. The ubiquitin fusion technique is thus a versatile and reliable method for obtaining selective cytotoxic agents and can easily be adapted for different kinds of toxins and activating proteases.
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Affiliation(s)
- Sergey O Tcherniuk
- Laboratoire de Biophysique Moléculaire, Institut de Biologie Structurale J. P. Ebel (CEA/CNRS/UJF), 41 rue Jules Horowitz, 38027 Grenoble, France
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Olsson AY, Bjartell A, Lilja H, Lundwall A. Expression of prostate-specific antigen (PSA) and human glandular kallikrein 2 (hK2) in ileum and other extraprostatic tissues. Int J Cancer 2005; 113:290-7. [PMID: 15389512 DOI: 10.1002/ijc.20605] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Prostate-specific antigen (PSA) is a widely used marker for prostate cancer. In the literature, there are reports of nonprostatic expression of PSA that potentially can affect early diagnosis. However, the results are scattered and inconclusive, which motivated us to conduct a more comprehensive study of the tissue distribution of PSA and the closely related protein human glandular kallikrein 2 (hK2). RT-PCR, in situ hybridization and immunohistochemistry were used to detect expression of both PSA and hK2 in secretory epithelial cells of trachea, thyroid gland, mammary gland, salivary gland, jejunum, ileum, epididymis, seminal vesicle and urethra, as well as in Leydig cells, pancreatic exocrine glands and epidermis. Immunometric measurements revealed that the concentration of PSA in nonprostatic tissues represents less than 1% of the amount in normal prostate. Pronounced expression of PSA was detected in the Paneth cells in ileum, which prompted us to compare functional parameters of PSA in ileum and prostate. We found that in homogenates from these 2 tissues, PSA manifested equivalent amidolytic activity and capacity to form complexes with protease inhibitors in blood in vitro. Thus, PSA released from sources other than the prostate may add to the plasma pool of this protein, but given the lower levels detected from those sites, it is unlikely that nonprostatic PSA normally can interfere with the diagnosis of prostate cancer. Nevertheless, this risk should not be neglected as it may be of clinical significance under certain circumstances. Supplementary material for this article can be found on the International Journal of Cancer website at http://www.interscience.wiley.com/jpages/0020-7136/suppmat/index.html.
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Affiliation(s)
- A Yvonne Olsson
- Department of Laboratory Medicine, Lund University, University Hospital UMAS, S-205 02 Malmö, Sweden.
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Abstract
The PSA revolution that has occurred over the previous 2 decades has positively impacted the detection and treatment of men with prostate cancer. Although methods to improve specificity have shown promise (eg, PSAD, age-specific PSA, and PSA velocity), meaningful interpretation has yet to be uniformly accepted within clinical practice. The identification of other molecular forms of PSA within serum has led to a new era in PSA markers. Initial application employing %fPSA has provided improved discrimination between benign and malignant prostatic disease; however, questions remain regarding the ultimate threshold value. The discovery of various free forms of PSA--such as proPSA, BPSA, and iPSA--also have introduced the potential for improved specificity in detection. Although early results are encouraging, further evaluation is anticipated. The development of improved methods to detect and measure cPSA has demonstrated provocative results, and exhibits the potential to replace PSA as a standard diagnostic test in cancer screening.
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Affiliation(s)
- Matthew B Gretzer
- The James Buchanan Brady Urological Institute, Johns Hopkins Hospital, 600 N. Wolfe St./Marburg 1A, Baltimore, MD 21287, USA.
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Shariat SF, Kattan MW, Erdamar S, Nguyen C, Scardino PT, Spencer DM, Wheeler TM, Slawin KM. Detection of clinically significant, occult prostate cancer metastases in lymph nodes using a splice variant-specific rt-PCR assay for human glandular kallikrein. J Clin Oncol 2003; 21:1223-31. [PMID: 12663708 DOI: 10.1200/jco.2003.08.142] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE To compare the detection of human glandular kallikrein 2 (hK2) mRNA expression in archival lymph nodes with disease progression, the development of prostate cancer metastases, and mortality in patients undergoing radical prostatectomy for locally advanced nonmetastatic prostate cancer. PATIENTS AND METHODS We evaluated total RNA extracted from fixed, paraffin-embedded, histopathologically normal pelvic lymph nodes, removed at radical prostatectomy, from 199 pT3N0 prostate cancer patients (150 extraprostatic extension only; 49 seminal vesicle involvement) for hK2-expressing cells using a novel reverse transcriptase polymerase chain reaction (RT-PCR)/hK2 assay. Cumulative incidence functions and Cox proportional hazards analyses were performed. RESULTS Forty patients (20%) had positive results, 80 patients (40%) had negative results, and 79 patients (40%) had equivocal results. RT-PCR/hK2 status was not associated with any pathologic characteristics (P >.05). In postoperative multivariable models, the RT-PCR/hK2 result was associated with prostate cancer progression (P =.001), development of distant metastases (P =.001), and prostate cancer-specific survival (P =.005). In patients experiencing biochemical progression (n = 33), RT-PCR/hK2 status was a predictor of failure to respond to salvage radiotherapy (P =.002). CONCLUSION RT-PCR/hK2 can detect biologically and clinically significant occult prostate cancer metastases in histopathologically normal lymph nodes. In patients with locally advanced prostate cancer, RT-PCR/hK2 is strongly associated with prostate cancer progression, failure following salvage radiation therapy, development of clinically evident metastases, and prostate cancer-specific mortality after surgery.
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Affiliation(s)
- Shahrokh F Shariat
- Baylor Prostate Center, the Scott Department of Urology, Baylor College of Medicine, Houston, TX 77030, USA
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Schwartz MS, Matuszewski BK. Determination of a peptide-doxorubicin, prostate-specific antigen activated prodrug, and its active metabolites in human plasma using high-performance liquid chromatography with fluorescence detection. Stabilization of the peptide prodrug with EDTA. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 780:171-82. [PMID: 12383493 DOI: 10.1016/s1570-0232(02)00464-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A method for the determination of I, a peptide-doxorubicin conjugate that was evaluated for the treatment of prostate cancer, and two of its active metabolites, doxorubicin and leucine-doxorubicin is described. Blood samples were chilled immediately after being drawn in order to prevent ex vivo entry of the metabolites into red blood cells. EDTA (10 mg/ml final concentration) was used to prevent plasma-mediated degradation of the peptide portion of the prodrug. After the addition of internal standard, plasma was prepared for analysis using a C-8 solid-phase extraction column. In order to overcome secondary ionic interactions with the silica-based extraction column, the analytes were eluted with ammonium hydroxide in methanol. The extracts were evaporated to dryness, reconstituted, and assayed by step change, gradient, reverse phase HPLC with fluorescence detection. Two interfering metabolites found in post dose plasma were chromatographically separated by an adjustment of the mobile phase pH. The within-day reproducibility of the doxorubicin and leucine-doxorubicin chromatographic retention times was improved by a brief washing of the analytical column with 90% acetonitrile after each injection. The range of the standard curve was 12.5-1250 ng/ml for doxorubicin and 25-2500 ng/ml for I and leucine-doxorubicin.
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Affiliation(s)
- Michael S Schwartz
- Merck Research Laboratories, WP75-200, Merck & Co Inc, West Point, PA 19486, USA
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Varma M, Morgan M, Jasani B, Tamboli P, Amin MB. Polyclonal anti-PSA is more sensitive but less specific than monoclonal anti-PSA: Implications for diagnostic prostatic pathology. Am J Clin Pathol 2002; 118:202-7. [PMID: 12162678 DOI: 10.1309/bgwq-p26t-7tr6-vgt3] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Prostate-specific antigen (PSA) production by nonprostatic tissues has been reported, casting doubts on its specificity. The immunohistochemical relative specificity and sensitivity of PSA expression using monoclonal and polyclonal anti-PSA was analyzed on 60 prostate carcinomas, 40 normal seminal vesicles, and 310 nonprostatic tumors. All nonprostatic tumors proved negative with both antibodies. However, 13 (32%) seminal vesicles showed immunoreactivity with polyclonal anti-PSA, but none showed immunoreactivity with the monoclonal antibody. The sensitivity of the 2 antibodies for prostate cancer varied with tumor grade. In Gleason pattern 3, both antibodies showed diffuse immunostaining in all cases. In Gleason pattern 5, polyclonal anti-PSA showed diffuse (>95%) tumor cell positivity in 18 cases (90%), while with the monoclonal antibody, 7 cases (35%) showed only focal (<10%) tumor cell immunoreactivity. Thus, monoclonal anti-PSA seems to be useful in small gland proliferations in which the differential diagnosis includes seminal vesicle, while for poorly differentiated neoplasms, polyclonal anti-PSA is considered superior. Sections of high-grade prostate cancer should be included as positive controls for PSA immunostaining.
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Affiliation(s)
- Murali Varma
- Department of Pathology, University Hospital of Wales, Cardiff
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37
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DiPaola RS, Rinehart J, Nemunaitis J, Ebbinghaus S, Rubin E, Capanna T, Ciardella M, Doyle-Lindrud S, Goodwin S, Fontaine M, Adams N, Williams A, Schwartz M, Winchell G, Wickersham K, Deutsch P, Yao SL. Characterization of a novel prostate-specific antigen-activated peptide-doxorubicin conjugate in patients with prostate cancer. J Clin Oncol 2002; 20:1874-9. [PMID: 11919247 DOI: 10.1200/jco.2002.07.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE To evaluate safety and pharmacokinetics (PK), and determine the recommended dose for efficacy studies, of L-377202, a novel peptide conjugate of doxorubicin (Dox) that releases the active metabolites leucine-doxorubicin (Leu-Dox) and Dox on cleavage by membrane-bound prostate-specific antigen (PSA). PATIENTS AND METHODS Nineteen patients with advanced hormone-refractory prostate cancer were treated intravenously with 71 cycles of L-377202 at escalating dose levels of 20 (n = 1), 40 (n = 3), 80 (n = 4), 160 (n = 3), 225 (n = 6), and 315 mg/m(2) (n = 2) once every 3 weeks. Toxicity, response, and PK of L-377202 were assessed. RESULTS L-377202 was well tolerated. Dose-limiting grade 4 neutropenia was noted in two of two patients administered 315 mg/m(2) (both patients were able to resume therapy at 225 mg/m(2)). The recommended dose for efficacy studies was 225 mg/m(2), which induced grade 4 neutropenia in one of six patients. PK studies demonstrated that L-377202 was metabolized to Leu-Dox and Dox. PK were linear; after administration of single doses of 225 mg/m(2), the mean area under the concentration-time profiles of L-377202, Leu-Dox, and Dox were 6 micromol x L/h, 4 micromol x L/h, and 1 micromol x L/h, and peak concentrations were 14 micromol/L, 5 micromol/L, and 120 nmol/L, respectively. At 225 and 315 mg/m(2), five patients completed at least three cycles of therapy; two patients had a greater than 75% decrease in PSA, and one patient had a stabilized PSA. No response was noted at dose levels less than 225 mg/m(2). CONCLUSION This is the first study of selective drug delivery in humans using a novel PSA-activated agent. L-377202 was cleaved to produce detectable levels of the active metabolites Leu-Dox and Dox. L-377202 was well tolerated and established a safe dose level for further study.
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Affiliation(s)
- Robert S DiPaola
- Department of Medicine, University of Medicine and Dentistry of New Jersey/Robert Wood Johnson Medical School, New Brunswick 08901, USA.
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Duraker N, Can D, Parilti M. Measurement of serum total and free prostate-specific antigen in women with colorectal carcinoma. Br J Cancer 2002; 86:203-6. [PMID: 11870506 PMCID: PMC2375183 DOI: 10.1038/sj.bjc.6600049] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2001] [Revised: 10/20/2001] [Accepted: 11/01/2001] [Indexed: 01/07/2023] Open
Abstract
We investigated the diagnostic value and the relationship with clinicopathological features of total and free prostate-specific antigen by measuring the concentrations of these markers in the sera of 75 women with colorectal carcinoma and in 30 healthy women. Measurements were performed by immunoradiometric assay which utilizes monoclonal and polyclonal anti-prostate-specific antigen antibodies; the lowest detection level for both markers was 0.01 ng ml(-1). Free prostate-specific antigen levels were significantly higher in women with colorectal carcinoma than healthy women (P=0.006). The percentage of free prostate-specific antigen predominant (free prostate-specific antigen/total prostate-specific antigen >50%) subjects was 20% in colorectal carcinoma patients and 3.3% in healthy women (P=0.035). Cut-off values were 0.34 ng ml(-1) for total prostate-specific antigen and 0.01 ng ml(-1) for free prostate-specific antigen. In women with colorectal carcinoma, total prostate-specific antigen positivity was 20% and free prostate-specific antigen positivity was 34.6%. When compared to negatives, total prostate-specific antigen positive patients had a lower percentage of well-differentiated (P=0.056) and early stage (stages I and II) tumours (P=0.070). However, patients with predominant free prostate-specific antigen, had a higher percentage of well-differentiated (P=0.014) and early stage tumours (P=0.090) than patients with predominant bound prostate-specific antigen. In conclusion, although the sensitivity of free prostate-specific antigen predominancy is low (20%), in distinguishing women with colorectal carcinoma than healthy women, its specificity is high (96.7%). Free prostate-specific antigen predominancy tends to be present in less aggressive tumours. These findings may indicate clinical significance of preoperative measurement of serum total and free prostate-specific antigen in women with colorectal carcinoma.
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Affiliation(s)
- N Duraker
- Fifth Department of Surgery, SSK Okmeydani Training Hospital, PO Box 80434, Istanbul, Turkey.
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39
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Herrala AM, Porvari KS, Kyllönen AP, Vihko PT. Comparison of human prostate specific glandular kallikrein 2 and prostate specific antigen gene expression in prostate with gene amplification and overexpression of prostate specific glandular kallikrein 2 in tumor tissue. Cancer 2001; 92:2975-84. [PMID: 11753974 DOI: 10.1002/1097-0142(20011215)92:12<2975::aid-cncr10113>3.0.co;2-k] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND There is a need for specific markers that can indicate the different stages of prostate carcinoma. There is ongoing speculation concerning the value of prostate specific glandular kallikrein (hK2) in this regard. METHODS The expression levels of both hK2 and human prostate specific antigen (hPSA) were compared at the mRNA and protein levels by using in situ hybridization and immunohistochemistry techniques in tissue specimens from patients with benign prostatic hyperplasia and malignant prostate carcinoma. The respective gene copy numbers were analyzed by a competitively differential polymerase chain reaction-based method. RESULTS In situ hybridization revealed that hK2 was expressed at significantly higher levels in malignant prostate tissue compared with benign prostate tissue (P < 0.0005), whereas hPSA expression levels were the reverse (P = 0.06). In benign tissue, the mean level of hK2 mRNA was 82% of the respective value of hPSA (P < 0.003), whereas, in tumor tissue, the mean hK2 expression level was 21% higher than that of hPSA (P < 0.01). The results at the protein level supported the mRNA findings: hPSA expression was lower in malignant tissues compared with benign tissues (17 of 20 specimens), whereas an increase in hK2 expression was detected in 17 of 19 specimens. The authors report that the hK2 gene (hKLK2) was amplified in prostate carcinoma tissue, whereas the hPSA gene was not. There was a correlation between hPSA and hK2 mRNA levels in both benign tissue (correlation coefficient [r] = 0.735; P < 0.01) and malignant tissue (r = 0.767; P < 0.01). CONCLUSIONS Gene amplification of hKLK2 may be one of the factors leading to higher expression of hK2 in prostate carcinoma. The correlation between hK2 and hPSA expression levels indicates coordinated expression of the genes in both normal and abnormal prostate gland. The results suggest the potential value of hK2 in the diagnosis of prostate carcinoma through mRNA analyses and gene amplification.
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Affiliation(s)
- A M Herrala
- Biocenter Oulu, World Health Organization Collaborating Center for Research on Reproductive Health, University of Oulu, Oulu, Finland
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40
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Becker C, Noldus J, Diamandis E, Lilja H. The role of molecular forms of prostate-specific antigen (PSA or hK3) and of human glandular kallikrein 2 (hK2) in the diagnosis and monitoring of prostate cancer and in extra-prostatic disease. Crit Rev Clin Lab Sci 2001; 38:357-99. [PMID: 11720279 DOI: 10.1080/20014091084236] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Prostate-specific antigen (PSA or hK3) is a glandular kallikrein with abundant expression in the prostate that is widely used to detect and monitor prostate cancer (PCa), although the serum level is frequently elevated also in benign and inflammatory prostatic diseases. PSA testing is useful for early detection of localized PCa and for the detection of disease recurrence after treatment. However, PSA has failed to accurately estimate cancer volume and preoperative staging. There is no PSA level in serum that definitively distinguishes men with benign conditions from those with prostate cancer, although PCa is rare in men with PSA levels in serum < 2.0 ng/ml. This prompted searches for enhancing parameters to combine with PSA testing, such as PSA density, PSA velocity, and age-specific reference ranges. Due to the protease structure, PSA occurs in different molecular forms in serum and their concentrations vary according to the type of prostatic disease. Human glandular kallikrein 2 (hK2) is very similar to PSA, but expressed at higher levels in prostate adenocarcinoma than in normal prostate epithelium. Blood testing for hK2 combined with different PSA forms improves discrimination of men with benign prostatic disease from those with prostate cancer. Many data have also been reported on the extra-prostatic expression of both PSA and hK2, and it is now believed that they may both have functions in tissues outside the prostate.
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Affiliation(s)
- C Becker
- Dept. of Clinical Chemistry, Lund University, Malmö University Hospital, Malmö, Sweden.
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41
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Van Der Cruijsen-Koeter IW, Wildhagen MF, De Koning HJ, Schröder FH. The value of current diagnostic tests in prostate cancer screening. BJU Int 2001; 88:458-66. [PMID: 11589658 DOI: 10.1046/j.1464-4096.2001.02381.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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42
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Rekasi Z, Schally AV, Plonowski A, Czompoly T, Csernus B, Varga JL. Regulation of prostate-specific antigen (PSA) gene expression and release in LNCaP prostate cancer by antagonists of growth hormone-releasing hormone and vasoactive intestinal peptide. Prostate 2001; 48:188-99. [PMID: 11494334 DOI: 10.1002/pros.1097] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND Prostate-specific antigen (PSA) is the best tumor marker for diagnosis and prognosis of prostatic carcinoma. The secretion of PSA from LNCaP human prostate cancer cells is influenced by acute stimuli such as vasoactive intestinal peptide (VIP), growth hormone-releasing hormone (GHRH), and chronic stimuli like androgens. METHODS To study the regulation of basal and VIP/GHRH or androgen-stimulated secretion from LNCaP cells, we used a superfusion system, which allowed us to simultaneously measure PSA gene expression, PSA secretion, and cAMP release from the same cancer cells. LNCaP cancer cells were also implanted orthotopically into nude mice. RESULTS VIP (30 pM-3 nM), GHRH (3 nM-300 nM), and dihydrotestosterone (100 nM) induced a significant increase in PSA gene expression, PSA secretion, and cAMP release. The dose and time-dependent effects of peptides were manifested only in the presence of androgens. At the end of continuous stimulation of cells with 1 nM VIP for 2 hr, large amounts of stored immunoreactive PSA still remained in the cells. Adenylate cyclase activator, forskolin (FSK), significantly increased PSA secretion and gene expression, and potassium, which causes nonspecific depolarization of membranes, augmented gene expression, and secretion of PSA, but did not influence cAMP release. This suggests that PSA secretion is regulated by cAMP-dependent as well as cAMP-independent pathways. In superfusion system, stimulatory effects of VIP and GHRH on PSA secretion were inhibited by VIP antagonist JV-1-53, and less by GHRH antagonist JV-1-38. In cell cultures, JV-1-38 had a stronger inhibitory effect on proliferation, indicating an involvement of the recently discovered tumoral GHRH receptors in this process. In nude mice, with orthotopically implanted LNCaP cancer cells, GHRH antagonist JV-1-38 alone or androgen ablation by castration had no effect on tumor growth and PSA levels. However, castration combined with treatment with GHRH antagonist, significantly decreased tumor growth and PSA secretion. CONCLUSIONS Our findings suggest that the secretion of PSA is regulated rather than constitutive, contrary to previous reports. In addition, the effect of GHRH and VIP antagonists on PSA secretion from prostate cancer cells is not correlated with their antiproliferative action.
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Affiliation(s)
- Z Rekasi
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, New Orleans, Louisiana 70112-1262, USA
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43
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Miller MK, Unger PD, Bleiweiss IJ. Immunohistochemical analysis of prostate specific antigen in breast cancer. Breast Cancer Res Treat 2001; 68:111-6. [PMID: 11688514 DOI: 10.1023/a:1011959127928] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The presence of immunoreactive prostate-specific antigen (IR-PSA) has been reported in breast cancers and has been suggested to confer a positive prognosis. However, recent large, well-controlled studies have found no significant prognostic value when IR-PSA positivity is examined as an independent variable, even when ultrasensitive immunofluorometric techniques are utilized. The present study, using indirect immunohistochemistry on 75 formalin-fixed, paraffin-embedded breast cancers shows PSA immunoreactivity in only seven of 75 cases (9%), suggesting that PSA positivity in breast carcinoma is not useful as a prognostic or tumor marker with hospital-based methods.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Breast Neoplasms, Male/metabolism
- Breast Neoplasms, Male/pathology
- Carcinoma in Situ/metabolism
- Carcinoma in Situ/pathology
- Carcinoma, Ductal, Breast/metabolism
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Lobular/metabolism
- Carcinoma, Lobular/pathology
- Female
- Humans
- Immunoenzyme Techniques
- Male
- Middle Aged
- Neoplasm Invasiveness
- Prognosis
- Prostate-Specific Antigen/metabolism
- Receptors, Estrogen/metabolism
- Receptors, Progesterone/metabolism
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Affiliation(s)
- M K Miller
- The Lillian and Henry Stratton-Hans Popper Department of Pathology, The Mount Sinai Medical Center, New York, NY 10029, USA
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44
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Gelmini S, Tricarico C, Vona G, Livi L, Melina AD, Serni S, Cellai E, Magrini S, Villari D, Carini M, Serio M, Forti G, Pazzagli M, Orlando C. Real-Time quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) for the measurement of prostate-specific antigen mRNA in the peripheral blood of patients with prostate carcinoma using the taqman detection system. Clin Chem Lab Med 2001; 39:385-91. [PMID: 11434386 DOI: 10.1515/cclm.2001.061] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Circulating prostate cells can be detected in peripheral blood of patients with clinically localized or advanced prostate carcinoma. Traditionally, nested reverse transcriptase-polymerase chain reaction (RT-PCR) is used for this as a sensitive, but qualitative only, detection system. We developed a quantitative real-time RT-PCR method for measuring prostate-specific antigen (PSA) mRNA in peripheral blood of prostate cancer patients. A quantitative assay was developed using an external standard reference curve generated with RNA from the human prostate cell line LNCaP. Basal blood samples were collected from 44 patients without evidence of distant metastases and from 30 healthy controls. In 29 patients surgically treated with radical prostatectomy, the measurement of PSA mRNA was performed in blood samples collected before, at the end and 6 days after surgery. In 14 patients treated with radiotherapy, the measurements were repeated at 3-month intervals to evaluate time-related changes during therapy. The measurements were also performed for one year at 3-month intervals in one patient treated with anti-androgen therapy. We found detectable PSA mRNA in 14/44 (32%) basal blood samples. A wide range of values were observed in these patients, ranging from 0.5 to 1724 pg of total LNCaP RNA/ml blood. In patients undergoing radical prostatectomy, circulating PSA mRNA was detectable in eight patients in basal samples, and in seven of them also in blood specimens collected at the end of surgery, showing an increase in only two patients. In blood samples collected 6 days later, PSA mRNA was dramatically reduced in all patients, but still present in seven of them. In four patients, whose basal samples were negative, PSA mRNA was detectable in samples collected at the end of surgery and three of them were negative after 6 days. In patients who did not receive surgical treatment, a rapid decrease in PSA mRNA was demonstrated in five patients treated with radiotherapy and in one patient undergoing androgen deprivation. No detectable PSA mRNA was found in healthy controls. The levels of PSA mRNA in peripheral blood from patients with prostate carcinoma can be easily measured by this sensitive, quantitative and reliable procedure. This assay is a promising tool for the detection and follow-up of these patients.
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Affiliation(s)
- S Gelmini
- Clinical Biochemistry Unit, University of Florence, Italy
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45
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Abstract
Genetic changes in cell-cycle, apoptotic, and survival pathways cause tumorigenesis, leading to significant phenotypic changes in transformed cells. These changes in the tumor environment - elevated expression of surface proteases, increased angiogenesis and glucuronidase activity - can be taken advantage of to improve the therapeutic index of existing cancer therapies. Targeting cytotoxics to tumor cells by enzymatic activation is a promising strategy for improving chemotherapeutics.
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Affiliation(s)
- P S Huang
- Dupont Pharmaceuticals Co., Department of Cancer Research, Glenolden, Pennsylvania 19036, USA
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46
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DeFeo-Jones D, Garsky VM, Wong BK, Feng DM, Bolyar T, Haskell K, Kiefer DM, Leander K, McAvoy E, Lumma P, Wai J, Senderak ET, Motzel SL, Keenan K, Van Zwieten M, Lin JH, Freidinger R, Huff J, Oliff A, Jones RE. A peptide-doxorubicin 'prodrug' activated by prostate-specific antigen selectively kills prostate tumor cells positive for prostate-specific antigen in vivo. Nat Med 2000; 6:1248-52. [PMID: 11062536 DOI: 10.1038/81351] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We covalently linked doxorubicin with a peptide that is hydrolyzable by prostate-specific antigen. In the presence of prostate tumor cells secreting prostate-specific antigen, the peptide moiety of this conjugate, L-377,202, was hydrolyzed, resulting in the release of leucine-doxorubicin and doxorubicin, which are both very cytotoxic to cancer cells. However, L-377,202 was much less cytotoxic than conventional doxorubicin to cells in culture that do not secrete prostate-specific antigen. L-377,202 was approximately 15 times more effective than was conventional doxorubicin at inhibiting the growth of human prostate cancer tumors in nude mice when both drugs were used at their maximally tolerated doses. Nude mice inoculated with human prostate tumor cells secreting prostate-specific antigen showed considerable reductions in tumor burden with minimal total body weight loss when treated with L-377, 202. This improvement in therapeutic index correlated with the selective localization of leucine-doxorubicin and free doxorubicin in tissues secreting prostate-specific antigen after exposure to L-377,202.
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Affiliation(s)
- D DeFeo-Jones
- Cancer Research, Merck Research Laboratories, West Point, Pennsylvania 19486, USA
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47
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48
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Gatalica Z, Norris BA, Kovatich AJ. Immunohistochemical localization of prostate-specific antigen in ductal epithelium of male breast. Potential diagnostic pitfall in patients with gynecomastia. Appl Immunohistochem Mol Morphol 2000; 8:158-61. [PMID: 10937064 DOI: 10.1097/00129039-200006000-00011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Enlargement of the male breast is frequently encountered in the course of adjuvant antiandrogen therapy for advanced prostate carcinoma. The clinical differential diagnosis in this setting includes hormonal imbalance-induced gynecomastia, primary breast carcinoma, and metastasis of prostatic carcinoma. Biopsy of the lesion with the identification of prostate-specific antigen (PSA) plays an important role in establishing the correct diagnosis. Recent studies showed that female mammary epithelium may be a significant source of PSA, but its expression in male breasts has not been sufficiently studied. We found that normal and hyperplastic duct epithelium in gynecomastia exhibited focal, strong (+3) PSA immunoreactivity in 5 of 18 cases (28%). In contrast, no PSA reactivity was found in eight cases of male breast carcinoma. No reactivity was seen with antiprostatic acid phosphatase (PsAP) antibody, in either benign or malignant epithelium. Frequent expression of PSA in gynecomastia may, in an appropriate clinical setting, cause confusion with metastatic prostatic carcinoma. The lack of immunoreactivity for PsAP in male breast epithelium indicates its usefulness in the differential diagnosis.
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Affiliation(s)
- Z Gatalica
- Division of Surgical Pathology, John Sealy Hospital, University of Texas Medical Branch, Galveston 77555-0588, USA.
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49
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Bharaj B, Scorilas A, Diamandis EP, Giai M, Levesque MA, Sutherland DJ, Hoffman BR. Breast cancer prognostic significance of a single nucleotide polymorphism in the proximal androgen response element of the prostate specific antigen gene promoter. Breast Cancer Res Treat 2000; 61:111-9. [PMID: 10942096 DOI: 10.1023/a:1006459613498] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Prostate Specific Antigen (PSA) expression by breast epithelial cells is associated with favorable breast cancer prognosis. In preliminary studies, we found that a nucleotide variation (G-->A) at position -158 in the androgen response element (ARE-1) of the PSA promoter was present in four out of 9 breast tumors examined and in a breast carcinoma cell line. We have now determined the nucleotide composition at position -158 of DNA extracted from 148 well-characterized breast tumors and compared tumor genotype with that of controls without cancer, with tumor PSA concentration and with clinicopathological variables, overall survival and disease free survival. The G-->A base change at position -158 is a polymorphism. Allelotypes were similarly distributed in breast cancer patients and controls. The Mann-Whitney U Test showed a significantly higher tumor PSA concentration in tumors that presented a homozygous G as opposed to homozygous A genotype. Genotype at position -158 was not associated with clinicopathological variables in contingency table analysis. Univariate Cox regression models showed a 28% reduction in risk for death in patients with homozygous G genotype compared to those with homozygous A genotype (P = 0.03). However, ARE-1 genotype did not significantly add to the prognostic power in the multivariate model of overall survival. In summary, the base change at position -158 is a polymorphism that may affect breast cancer prognosis, but further studies are required to confirm this possibility and to investigate the relevance of this polymorphism in terms of breast cancer susceptibility.
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Affiliation(s)
- B Bharaj
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, University of Toronto, Ontario, Canada
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50
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Fan CY, Wang J, Barnes EL. Expression of androgen receptor and prostatic specific markers in salivary duct carcinoma: an immunohistochemical analysis of 13 cases and review of the literature. Am J Surg Pathol 2000; 24:579-86. [PMID: 10757407 DOI: 10.1097/00000478-200004000-00014] [Citation(s) in RCA: 133] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Salivary duct carcinoma (SDC) is an uncommon, pathologically distinct entity characterized by its morphologic resemblance to ductal carcinoma of the breast and highly aggressive behavior. Approximately two thirds of patients die within 4 years of initial diagnosis despite aggressive, combined surgical resection and radiotherapy. Review of the literature indicates that androgen receptor (AR), a marker frequently detected in prostatic carcinoma, is expressed in over 90% of SDCs, whereas two common breast carcinoma markers, estrogen and progesterone receptors (ER and PR), are expressed in only 1.3% and 6% of the tumors, respectively, by immunohistochemistry. This hormonal profile suggests that SDC, in contrast to its histiologic similarity to ductal carcinoma of the breast, is immunophenotypically more related to prostatic carcinoma. To substantiate this hypothesis, we performed immunohistochemical staining of 13 cases of SDC for the presence of AR and two prostatic markers, prostate specific antigen (PSA) and prostatic acid phosphatase (PAP). Our results showed multifocal, scattered, moderate immunostaining for PAP and diffuse, moderate immunostaining for PSA in seven (58.3%) and two (16.7%) cases, respectively. These results create a potential diagnostic challenge to surgical pathologists who are dealing with a metastatic adenocarcinoma of AR+/PSA+/-/PAP+/- phenotype, particularly in male patients of unknown primary. Metastatic salivary duct carcinoma should be given serious thought if clinical investigation fails to reveal a prostatic primary. The immunophenotypic homology that exists between SDC and prostatic carcinoma also suggests that antiandrogen therapy as used in the treatment of prostatic carcinoma might be beneficial in patients with metastatic SDC when all other conventional modalities fail.
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MESH Headings
- Acid Phosphatase/analysis
- Adult
- Aged
- Aged, 80 and over
- Carcinoma, Ductal, Breast/chemistry
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Intraductal, Noninfiltrating/chemistry
- Carcinoma, Intraductal, Noninfiltrating/pathology
- Female
- Humans
- Immunoenzyme Techniques
- Male
- Middle Aged
- Prostate-Specific Antigen/analysis
- Receptors, Androgen/analysis
- Salivary Ducts/chemistry
- Salivary Ducts/pathology
- Salivary Gland Neoplasms/chemistry
- Salivary Gland Neoplasms/pathology
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Affiliation(s)
- C Y Fan
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, USA
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