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Ito T, Takahara T, Taniguchi N, Yamamoto Y, Satou A, Ohashi A, Takahashi E, Sassa N, Tsuzuki T. PTEN loss in intraductal carcinoma of the prostate has low incidence in Japanese patients. Pathol Int 2023; 73:542-548. [PMID: 37608749 DOI: 10.1111/pin.13369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/02/2023] [Indexed: 08/24/2023]
Abstract
Clinical and genomic features of prostate cancer (PCa) vary considerably between Asian and Western populations. PTEN loss is the most frequent abnormality in intraductal carcinoma of the prostate (IDC-P) in Western populations. However, its prevalence and significance in Asian populations have not yet been well studied. In the present study, we evaluated PTEN expression in IDC-P in a Japanese population and its association with ERG expression. This study included 45 and 59 patients with PCa with and without IDC-P, respectively, who underwent radical prostatectomy. PTEN loss was observed in 10 patients with PCa with IDC-P (22%) and nine patients with PCa without IDC-P (17%). ERG expression was relatively frequent in patients with PCa with PTEN loss, although a significant difference was not observed. The co-occurrence of PTEN loss and ERG expression was observed in four patients with PCa with IDC-P and one without IDC-P. PTEN loss and ERG expression did not affect progression-free survival, regardless of the presence of IDC-P. The frequency of PTEN loss in IDC-P is lower in Asian patients than in Western patients. Our results indicate that mechanisms underlying IDC-P in Asian populations are different from those of Western populations.
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Affiliation(s)
- Takanori Ito
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Taishi Takahara
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Natsuki Taniguchi
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Yuki Yamamoto
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Akira Satou
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Akiko Ohashi
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Emiko Takahashi
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
| | - Naoto Sassa
- Department of Urology, Aichi Medical University Hospital, Nagakute, Japan
| | - Toyonori Tsuzuki
- Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan
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2
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Weidemann S, Gorbokon N, Lennartz M, Hube-Magg C, Fraune C, Bernreuther C, Clauditz TS, Jacobsen F, Jansen K, Schmalfeldt B, Wölber L, Paluchowski P, Berkes E, Heilenkötter U, Sauter G, Uhlig R, Wilczak W, Steurer S, Simon R, Krech T, Marx A, Burandt E, Lebok P. High Homogeneity of Mesothelin Expression in Primary and Metastatic Ovarian Cancer. Appl Immunohistochem Mol Morphol 2023; 31:77-83. [PMID: 36728364 PMCID: PMC9928564 DOI: 10.1097/pai.0000000000001097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 11/22/2022] [Indexed: 02/03/2023]
Abstract
To study the extent of heterogeneity of mesothelin overexpression in primary ovarian cancers and their peritoneal and lymph node metastases, a tissue microarray (TMA) was constructed from multiple sites of 220 ovarian cancers and analyzed by immunohistochemistry. One tissue core each was taken from up to 18 different tumor blocks per cancer, resulting in a total of 2460 tissue spots from 423 tumor sites (188 primary cancers, 162 peritoneal carcinosis, and 73 lymph node metastases). Positive mesothelin expression was found in 2041 of the 2342 (87%) arrayed tissue spots and in 372 of the 392 (95%) tumor sites that were interpretable for mesothelin immunohistochemistry. Intratumoral heterogeneity was found in 23% of 168 primary cancer sites interpretable for mesothelin and decreased to 12% in 154 peritoneal carcinosis and to 6% in 71 lymph node metastases ( P <0.0001). Heterogeneity between the primary tumor and matched peritoneal carcinosis was found in 16% of 102 cancers with interpretable mesothelin results. In these cancers, the mesothelin status switched from positive in the primary tumor to negative in the peritoneal carcinosis (3 cancers) in or vice versa (2 cancers), or a mixture of positive and negative peritoneal carcinoses was found (11 cancers). No such switch was seen between the mesothelin-interpretable primary tumors and their nodal metastases of 59 cancers, and only 1 mesothelin-positive tumor had a mixture of positive and negative lymph node metastases. In conclusion, mesothelin expression is frequent and highly homogeneous in ovarian cancer.
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Affiliation(s)
- Sören Weidemann
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Natalia Gorbokon
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | | | | | - Christoph Fraune
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | | | - Till S. Clauditz
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Frank Jacobsen
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Kristina Jansen
- General, Visceral and Thoracic Surgery Department and Clinic
| | | | - Linn Wölber
- Department of Gynecology, University Medical Center Hamburg-Eppendorf
| | | | - Enikö Berkes
- Department of Gynecology, Regio Clinic Itzehoe, Itzehoe
| | | | - Guido Sauter
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Ria Uhlig
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Waldemar Wilczak
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Stefan Steurer
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Ronald Simon
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Till Krech
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
- Clinical Center Osnabrueck, Institute of Pathology, Osnabrueck
| | - Andreas Marx
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
- Department of Pathology, Academic Hospital Fuerth, Fuerth, Germany
| | - Eike Burandt
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
| | - Patrick Lebok
- Institute of Pathology, University Medical Center Hamburg-Eppendorf
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Liu J, Dong L, Zhu Y, Dong B, Sha J, Zhu HH, Pan J, Xue W. Prostate cancer treatment - China's perspective. Cancer Lett 2022; 550:215927. [PMID: 36162714 DOI: 10.1016/j.canlet.2022.215927] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 09/07/2022] [Accepted: 09/21/2022] [Indexed: 11/02/2022]
Abstract
Prostate cancer (PCa) incidence and mortality have rapidly increased in China. Notably, unique epidemiological characteristics of PCa are found in the Chinese PCa population, including a low but rising incidence and an inferior but improving disease prognosis. Consequently, the current treatment landscape of PCa in China demonstrates distinct features. Establishing a more thorough understanding of the characteristics of Chinese patients may help provide novel insights into potential treatment strategies for PCa patients. Herein, we review the epidemiological status and differences in treatment modalities of Chinese PCa patients. In addition, we discuss the underlying socioeconomic and biological factors that contribute to such diversity and further propose directions for future efforts in optimizing the PCa treatment in China.
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Affiliation(s)
- Jiazhou Liu
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Liang Dong
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Yinjie Zhu
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Baijun Dong
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Jianjun Sha
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Helen He Zhu
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China; State Key Laboratory of Oncogenes and Related Genes, Renji-Med-X Stem Cell Research Center, Department of Urology, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Jiahua Pan
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China.
| | - Wei Xue
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China.
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4
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Pantazopoulos H, Diop MK, Grosset AA, Rouleau-Gagné F, Al-Saleh A, Boblea T, Trudel D. Intraductal Carcinoma of the Prostate as a Cause of Prostate Cancer Metastasis: A Molecular Portrait. Cancers (Basel) 2022; 14:820. [PMID: 35159086 PMCID: PMC8834356 DOI: 10.3390/cancers14030820] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/01/2022] [Accepted: 02/02/2022] [Indexed: 02/01/2023] Open
Abstract
Intraductal carcinoma of the prostate (IDC-P) is one of the most aggressive types of prostate cancer (PCa). IDC-P is identified in approximately 20% of PCa patients and is associated with recurrence, metastasis, and PCa-specific death. The main feature of this histological variant is the colonization of benign glands by PCa cells. Although IDC-P is a well-recognized independent parameter for metastasis, mechanisms by which IDC-P cells can spread and colonize other tissues are not fully known. In this review, we discuss the molecular portraits of IDC-P determined by immunohistochemistry and genomic approaches and highlight the areas in which more research is needed.
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Affiliation(s)
- Helen Pantazopoulos
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), 900 Saint-Denis, Montreal, QC H2X 0A9, Canada; (H.P.); (M.-K.D.); (A.-A.G.); (F.R.-G.); (A.A.-S.); (T.B.)
- Institut du Cancer de Montréal, 900 Saint-Denis, Montreal, QC H2X 0A9, Canada
- Department of Pathology and Cellular Biology, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montreal, QC H3T 1J4, Canada
| | - Mame-Kany Diop
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), 900 Saint-Denis, Montreal, QC H2X 0A9, Canada; (H.P.); (M.-K.D.); (A.-A.G.); (F.R.-G.); (A.A.-S.); (T.B.)
- Institut du Cancer de Montréal, 900 Saint-Denis, Montreal, QC H2X 0A9, Canada
- Department of Pathology and Cellular Biology, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montreal, QC H3T 1J4, Canada
| | - Andrée-Anne Grosset
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), 900 Saint-Denis, Montreal, QC H2X 0A9, Canada; (H.P.); (M.-K.D.); (A.-A.G.); (F.R.-G.); (A.A.-S.); (T.B.)
- Institut du Cancer de Montréal, 900 Saint-Denis, Montreal, QC H2X 0A9, Canada
- Department of Pathology and Cellular Biology, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montreal, QC H3T 1J4, Canada
| | - Frédérique Rouleau-Gagné
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), 900 Saint-Denis, Montreal, QC H2X 0A9, Canada; (H.P.); (M.-K.D.); (A.-A.G.); (F.R.-G.); (A.A.-S.); (T.B.)
- Institut du Cancer de Montréal, 900 Saint-Denis, Montreal, QC H2X 0A9, Canada
- Department of Pathology and Cellular Biology, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montreal, QC H3T 1J4, Canada
| | - Afnan Al-Saleh
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), 900 Saint-Denis, Montreal, QC H2X 0A9, Canada; (H.P.); (M.-K.D.); (A.-A.G.); (F.R.-G.); (A.A.-S.); (T.B.)
- Institut du Cancer de Montréal, 900 Saint-Denis, Montreal, QC H2X 0A9, Canada
- Department of Pathology and Cellular Biology, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montreal, QC H3T 1J4, Canada
| | - Teodora Boblea
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), 900 Saint-Denis, Montreal, QC H2X 0A9, Canada; (H.P.); (M.-K.D.); (A.-A.G.); (F.R.-G.); (A.A.-S.); (T.B.)
- Institut du Cancer de Montréal, 900 Saint-Denis, Montreal, QC H2X 0A9, Canada
| | - Dominique Trudel
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), 900 Saint-Denis, Montreal, QC H2X 0A9, Canada; (H.P.); (M.-K.D.); (A.-A.G.); (F.R.-G.); (A.A.-S.); (T.B.)
- Institut du Cancer de Montréal, 900 Saint-Denis, Montreal, QC H2X 0A9, Canada
- Department of Pathology and Cellular Biology, Université de Montréal, 2900 Boulevard Édouard-Montpetit, Montreal, QC H3T 1J4, Canada
- Department of Pathology, Centre Hospitalier de l’Université de Montréal (CHUM), 1051 Sanguinet, Montreal, QC H2X 0C1, Canada
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5
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Abstract
Prostate cancer is a global health problem, but incidence varies considerably across different continents. Asia is traditionally considered a low-incidence area, but the incidence and mortality of prostate cancer have rapidly increased across the continent. Substantial differences in epidemiological features have been observed among different Asian regions, and incidence, as well as mortality-to-incidence ratio, is associated with the human development index. Prostate cancer mortality decreased in Japan and Israel from 2007 to 2016, but mortality has increased in Thailand, Kyrgyzstan and Uzbekistan over the same period. Genomic analyses have shown a low prevalence of ERG oncoprotein in the East Asian population, alongside a low rate of PTEN loss, high CHD1 enrichments and high FOXA1 alterations. Contributions from single-nucleotide polymorphisms to prostate cancer risk vary with ethnicity, but germline mutation rates of DNA damage repair genes in metastatic prostate cancer are comparable in Chinese and white patients from the USA and UK. Pharmacogenomic features of testosterone metabolism might contribute to disparities seen in the response to androgen deprivation between East Asian men and white American and European men. Overall, considerable diversity in epidemiology and genomics of prostate cancer across Asia defines disease characteristics in these populations, but studies in this area are under-represented in the literature. Taking into account this intracontinental and intercontinental heterogeneity, translational studies are required in order to develop ethnicity-specific treatment strategies.
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6
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Gülhan Ö, Mahi B. The Role of AMACR, CD10, TMPRSS2-ERG, and p27 Protein Expression Among Different Gleason Grades of Prostatic Adenocarcinoma on Needle Biopsy. Clin Med Insights Oncol 2020; 14:1179554920947322. [PMID: 35185351 PMCID: PMC8855389 DOI: 10.1177/1179554920947322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 07/06/2020] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE We examined the immunohistochemical expression of α-methyl acyl coenzyme A racemase (AMACR), CD10, TMPRSS2-ERG, and p27 in prostate adenocarcinoma tumors with different Gleason growth patterns and nonneoplastic prostate tissues to elucidate their roles in prostate carcinogenesis and histological aggressiveness. MATERIAL AND METHODS In total, 80 archival core biopsy tissues diagnosed as prostate carcinoma, benign prostate hyperplasia, and atrophy cases were included. Immunoreactivity was evaluated by calculating the percentage of positively stained cells and the staining intensity. The mean values and test of significance were obtained using the Kruskal-Wallis test. RESULTS We obtained mostly intense immunoreactivity for AMACR, CD10, and ERG in adenocarcinomas. Although no significant differences were noted regarding AMACR and ERG expression, samples with Gleason growth patterns 3 and 5 tended to be strongly positive for ERG. Pattern 3 tumors exhibited the weakest positivity for CD10. The p27 expression was strong and diffuse in nonneoplastic prostate tissues. The loss of p27 expression was more frequent for pattern 5 tumors. CONCLUSION ERG and AMACR were powerful markers to detect cancer. Especially, ERG is evident in early tumors may reflect its interaction with functional androgen receptors in cancer initiation. Pattern 5 tumors associated with stroma may have been exposed to more stromal substrates and upregulate their CD10 content as a protein degrader. We suggest that CD10 expression is associated with an increasing tumor grade. Decreased concentrations of p27 protein might be implicated in prostate carcinogenesis and may be a useful immunohistochemical adjunct in predicting histological aggressiveness.
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Affiliation(s)
- Özdemir Gülhan
- Department of Pathology, Mengücek Gazi Training and Research Hospital, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Balcı Mahi
- Department of Pathology, Faculty of Medicine, Kirikkale University, Kırıkkale, Turkey
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7
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Ahmed ES, Elnour LS, Hassan R, Siddig EE, Chacko ME, Ali ET, Mohamed MA, Munir A, Muneer MS, Mohamed NS, Edris AMM. Immunohistochemical expression of Cyclin D1 among Sudanese patients diagnosed with benign and malignant prostatic lesions. BMC Res Notes 2020; 13:295. [PMID: 32552908 PMCID: PMC7302005 DOI: 10.1186/s13104-020-05138-7] [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] [Received: 07/03/2019] [Accepted: 06/14/2020] [Indexed: 12/24/2022] Open
Abstract
Objectives Prostate cancer (PC) is common cancer worldwide. Several markers have been developed to differentiate between benign prostatic hyperplasia (BPH) from PC. A descriptive retrospective hospital-based study aimed at determining the expression of Cyclin D1 in BPH and PC. The study took place at different histopathology laboratories in Khartoum state, Sudan, from December 2016 to January 2019. Formalin-fixed paraffin-embedded blocks were sectioned and fixed in 3-aminopropyltriethoxysilane coated slides incubated into primary antibody for Cyclin D1. The assessment of immunoreactivity of Cyclin D1 of each section was done using the Gleason scoring system. Results A total of 153 males’ prostate sections included in this study, of them, 120 (78.4%) were PC, and 33 (21.6%) were BPH. Their age ranged from 45 to 88 years, mean age was 66.19 ± 8.599. 142 (92.8%) did not have a family history of PC, while 11 (7.2%) patients reported having a family history. The Gleason scoring showed a total of 81 (52.9%) patients with high-grade and 39 (25.5%) with low-grade. 118 (97.5%) patients had PC showed positive results for Cyclin D1, while BPH was 3 (2.5%). P value < 0.001. Cyclin D1 staining was associated with high-grade Gleason score and perineural invasion, P value 0.001.
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Affiliation(s)
| | - Lubna S Elnour
- Department of Cytology and Histopathology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan
| | - Rowa Hassan
- Mycetoma Research Center, University of Khartoum, Khartoum, Sudan
| | - Emmanuel E Siddig
- Mycetoma Research Center, University of Khartoum, Khartoum, Sudan.,Department of Cytology and Histopathology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan.,Nile University- School of Medicine, Khartoum, Sudan.,Department of Histopathology and Cytology, Alfarrabi College for Science and Technology, Khartoum, Sudan
| | | | - Eman T Ali
- Department of Cytology and Histopathology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan.,Department of Histopathology and Cytology, Faculty of Medical Laboratory Sciences, National University, Khartoum, Sudan
| | - Mona A Mohamed
- Department of Parasitology and Medical Entomology, Faculty of Medical Laboratory Sciences, Nile University, Khartoum, Sudan
| | - Abdalla Munir
- Department of Bioinformatics and Biostatistics, National University Research Institute, National University, Khartoum, Sudan
| | - Mohamed S Muneer
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.,Department of Radiology, Mayo Clinic, Jacksonville, FL, USA.,Department of Internal Medicine, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
| | - Nouh S Mohamed
- Department of Parasitology and Medical Entomology, Faculty of Medical Laboratory Sciences, Nile University, Khartoum, Sudan. .,Department of Parasitology and Medical Entomology, Faculty of Medicine, Sinnar University, Sinnar, Sudan. .,Molecular Biology Department, Alfarrabi College for sciences and Technology, Khartoum, Sudan.
| | - Ali M M Edris
- Department of Cytology and Histopathology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan.,Department of Histopathology and Cytology, Faculty of Applied Medical Sciences, University of Bisha, Bisha, Kingdom of Saudi Arabia
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8
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Blackburn J, Vecchiarelli S, Heyer EE, Patrick SM, Lyons RJ, Jaratlerdsiri W, van Zyl S, Bornman MSR, Mercer TR, Hayes VM. TMPRSS2-ERG fusions linked to prostate cancer racial health disparities: A focus on Africa. Prostate 2019; 79:1191-1196. [PMID: 31090091 PMCID: PMC6617820 DOI: 10.1002/pros.23823] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/11/2019] [Accepted: 04/17/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND The androgen-regulated gene TMPRSS2 to the ETS transcription factor gene ERG fusion is the most common genomic alteration acquired during prostate tumorigenesis and biased toward men of European ancestry. In contrast, African American men present with more advanced disease, yet their tumors are less likely to acquire TMPRSS2-ERG. Data for Africa is scarce. METHODS RNA was made available for genomic analyses from 181 prostate tissue biopsy cores from Black South African men, 94 with and 87 without pathological evidence for prostate cancer. Reverse transcription polymerase chain reaction was used to screen for the TMPRSS2-ERG fusion, while transcript junction coordinates and isoform frequencies, including novel gene fusions, were determined using targeted RNA sequencing. RESULTS Here we report a frequency of 13% for TMPRSS2-ERG in tumors from Black South Africans. Present in 12/94 positive versus 1/87 cancer negative prostate tissue cores, this suggests a 92.62% predictivity for a positive cancer diagnosis (P = 0.0031). At a frequency of almost half that reported for African Americans and roughly a quarter of that reported for men of European ancestry, acquisition of TMPRSS2-ERG appears to be inversely associated with aggressive prostate cancer. Further support was provided by linking the presence of TMPRSS2-ERG to low-grade disease in younger patients (P = 0.0466), with higher expressing distal ERG fusion junction coordinates. CONCLUSIONS Only the second study of its kind for the African continent, we support a link between TMPRSS2-ERG status and prostate cancer racial health disparity beyond the borders of the United States. We call for urgent evaluation of androgen deprivation therapy within Africa.
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Affiliation(s)
- James Blackburn
- Garvan Institute of Medical ResearchThe Kinghorn Cancer CentreDarlinghurstAustralia
- St. Vincent's Clinical SchoolFaculty of Medicine, UNSWSydneyAustralia
| | - Stefano Vecchiarelli
- Garvan Institute of Medical ResearchThe Kinghorn Cancer CentreDarlinghurstAustralia
| | - Erin E. Heyer
- Garvan Institute of Medical ResearchThe Kinghorn Cancer CentreDarlinghurstAustralia
| | - Sean M. Patrick
- School of Health Systems and Public HealthUniversity of PretoriaGezinaSouth Africa
| | - Ruth J. Lyons
- Garvan Institute of Medical ResearchThe Kinghorn Cancer CentreDarlinghurstAustralia
| | | | - Smit van Zyl
- University of Limpopo, Turfloop CampusSovengaSouth Africa
| | - M. S. Riana Bornman
- School of Health Systems and Public HealthUniversity of PretoriaGezinaSouth Africa
| | - Tim R. Mercer
- Garvan Institute of Medical ResearchThe Kinghorn Cancer CentreDarlinghurstAustralia
- St. Vincent's Clinical SchoolFaculty of Medicine, UNSWSydneyAustralia
- Altius Institute for Biomedical SciencesSeattleWashington
| | - Vanessa M. Hayes
- Garvan Institute of Medical ResearchThe Kinghorn Cancer CentreDarlinghurstAustralia
- St. Vincent's Clinical SchoolFaculty of Medicine, UNSWSydneyAustralia
- School of Health Systems and Public HealthUniversity of PretoriaGezinaSouth Africa
- University of Limpopo, Turfloop CampusSovengaSouth Africa
- Sydney Medical SchoolUniversity of SydneyCamperdownAustralia
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