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Zhu J, Wang Y, Chang WY, Malewska A, Napolitano F, Gahan JC, Unni N, Zhao M, Yuan R, Wu F, Yue L, Guo L, Zhao Z, Chen DZ, Hannan R, Zhang S, Xiao G, Mu P, Hanker AB, Strand D, Arteaga CL, Desai N, Wang X, Xie Y, Wang T. Mapping Cellular Interactions from Spatially Resolved Transcriptomics Data. bioRxiv 2024:2023.09.18.558298. [PMID: 37781617 PMCID: PMC10541142 DOI: 10.1101/2023.09.18.558298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Cell-cell communication (CCC) is essential to how life forms and functions. However, accurate, high-throughput mapping of how expression of all genes in one cell affects expression of all genes in another cell is made possible only recently, through the introduction of spatially resolved transcriptomics technologies (SRTs), especially those that achieve single cell resolution. However, significant challenges remain to analyze such highly complex data properly. Here, we introduce a Bayesian multi-instance learning framework, spacia, to detect CCCs from data generated by SRTs, by uniquely exploiting their spatial modality. We highlight spacia's power to overcome fundamental limitations of popular analytical tools for inference of CCCs, including losing single-cell resolution, limited to ligand-receptor relationships and prior interaction databases, high false positive rates, and most importantly the lack of consideration of the multiple-sender-to-one-receiver paradigm. We evaluated the fitness of spacia for all three commercialized single cell resolution ST technologies: MERSCOPE/Vizgen, CosMx/Nanostring, and Xenium/10X. Spacia unveiled how endothelial cells, fibroblasts and B cells in the tumor microenvironment contribute to Epithelial-Mesenchymal Transition and lineage plasticity in prostate cancer cells. We deployed spacia in a set of pan-cancer datasets and showed that B cells also participate in PDL1/PD1 signaling in tumors. We demonstrated that a CD8+ T cell/PDL1 effectiveness signature derived from spacia analyses is associated with patient survival and response to immune checkpoint inhibitor treatments in 3,354 patients. We revealed differential spatial interaction patterns between γδ T cells and liver hepatocytes in healthy and cancerous contexts. Overall, spacia represents a notable step in advancing quantitative theories of cellular communications.
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Affiliation(s)
- James Zhu
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Yunguan Wang
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, 45229, USA
- Department of Pediatrics, University of Cincinnati, OH, 45221, USA
| | - Woo Yong Chang
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Alicia Malewska
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Fabiana Napolitano
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Jeffrey C. Gahan
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Nisha Unni
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Min Zhao
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Rongqing Yuan
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Fangjiang Wu
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Lauren Yue
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Lei Guo
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Zhuo Zhao
- Department of Computer Science and Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Danny Z. Chen
- Department of Computer Science and Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Raquibul Hannan
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Siyuan Zhang
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Guanghua Xiao
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Ping Mu
- Department of Molecular Biology, UT Southwestern Medical Center, Dallas, TX, 75390, USA
- Hamon Center for Regenerative Science and Medicine, UT Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Ariella B. Hanker
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Douglas Strand
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Carlos L. Arteaga
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Neil Desai
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Xinlei Wang
- Department of Mathematics, University of Texas at Arlington, Arlington, TX, 76019, USA
- Center for Data Science Research and Education, College of Science, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Yang Xie
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Tao Wang
- Quantitative Biomedical Research Center, Peter O’Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
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Joseph DB, Henry GH, Malewska A, Reese JC, Mauck RJ, Gahan JC, Hutchinson RC, Mohler JL, Roehrborn CG, Strand DW. 5-alpha reductase inhibitors induce a prostate luminal to club cell transition in human benign prostatic hyperplasia. J Pathol 2021; 256:427-441. [PMID: 34928497 DOI: 10.1002/path.5857] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/22/2021] [Accepted: 12/17/2021] [Indexed: 11/09/2022]
Abstract
Benign prostatic hyperplasia (BPH) is a progressive expansion of peri-urethral prostate tissue common in aging men. Patients with enlarged prostates are treated with 5-alpha reductase inhibitors (5ARIs) to shrink prostate volume by blocking the conversion of testosterone to dihydrotestosterone (DHT). A reduction in DHT levels can elicit atrophy and apoptosis of prostate secretory luminal cells, which results in a favorable clinical response characterized by improved lower urinary tract symptoms. However, the histologic response to 5ARI treatment is often heterogeneous across prostate acini and lower urinary tract symptoms can persist to require surgical intervention. We used two spatial profiling approaches to characterize gene expression changes across histologically normal and atrophied regions in prostates from 5ARI-treated men. Objective transcriptomic profiling using the Visium spatial gene expression platform showed that 5ARI-induced atrophy of prostate luminal cells correlated with reduced androgen receptor signaling and increased expression of urethral club cell genes including LTF, PIGR, OLFM4, SCGB1A1 and SCGB3A1. Prostate luminal cells within atrophied acini adapted to decreased DHT conditions by increasing NF-κB signaling and anti-apoptotic BCL2 expression, which may explain their survival. Using GeoMx digital spatial profiling with a probe set to assess ~18,000 RNA targets, we confirmed that atrophied acini expressing SCGB3A1 displayed higher levels of club cell markers compared to histologically normal acini with NKX3-1 expression. In addition, club-like cells within regions of 5ARI-induced atrophy closely resembled true club cells from the prostatic urethra. A comparison of histologically normal regions from 5ARI-treated men and histologically normal regions from untreated men revealed few transcriptional differences. Taken together, our results describe a heterogeneous response to 5ARI treatment where cells in atrophied acini undergo an adaptation from a prostate secretory luminal to a club cell-like state in response to 5ARI treatment. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Diya B Joseph
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Gervaise H Henry
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Alicia Malewska
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | | | - Ryan J Mauck
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Jeffrey C Gahan
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Ryan C Hutchinson
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - James L Mohler
- Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Claus G Roehrborn
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Douglas W Strand
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
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Joseph DB, Henry GH, Malewska A, Reese JC, Mauck RJ, Gahan JC, Hutchinson RC, Malladi VS, Roehrborn CG, Vezina CM, Strand DW. Single-cell analysis of mouse and human prostate reveals novel fibroblasts with specialized distribution and microenvironment interactions. J Pathol 2021; 255:141-154. [PMID: 34173975 DOI: 10.1002/path.5751] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/09/2021] [Accepted: 06/22/2021] [Indexed: 11/06/2022]
Abstract
Stromal-epithelial interactions are critical to the morphogenesis, differentiation, and homeostasis of the prostate, but the molecular identity and anatomy of discrete stromal cell types is poorly understood. Using single-cell RNA sequencing, we identified and validated the in situ localization of three smooth muscle subtypes (prostate smooth muscle, pericytes, and vascular smooth muscle) and two novel fibroblast subtypes in human prostate. Peri-epithelial fibroblasts (APOD+) wrap around epithelial structures, whereas interstitial fibroblasts (C7+) are interspersed in extracellular matrix. In contrast, the mouse displayed three fibroblast subtypes with distinct proximal-distal and lobe-specific distribution patterns. Statistical analysis of mouse and human fibroblasts showed transcriptional correlation between mouse prostate (C3+) and urethral (Lgr5+) fibroblasts and the human interstitial fibroblast subtype. Both urethral fibroblasts (Lgr5+) and ductal fibroblasts (Wnt2+) in the mouse contribute to a proximal Wnt/Tgfb signaling niche that is absent in human prostate. Instead, human peri-epithelial fibroblasts express secreted WNT inhibitors SFRPs and DKK1, which could serve as a buffer against stromal WNT ligands by creating a localized signaling niche around individual prostate glands. We also identified proximal-distal fibroblast density differences in human prostate that could amplify stromal signaling around proximal prostate ducts. In human benign prostatic hyperplasia, fibroblast subtypes upregulate critical immunoregulatory pathways and show distinct distributions in stromal and glandular phenotypes. A detailed taxonomy of leukocytes in benign prostatic hyperplasia reveals an influx of myeloid dendritic cells, T cells and B cells, resembling a mucosal inflammatory disorder. A receptor-ligand interaction analysis of all cell types revealed a central role for fibroblasts in growth factor, morphogen, and chemokine signaling to endothelia, epithelia, and leukocytes. These data are foundational to the development of new therapeutic targets in benign prostatic hyperplasia. © 2021 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Diya B Joseph
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Gervaise H Henry
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Alicia Malewska
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | | | - Ryan J Mauck
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Jeffrey C Gahan
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Ryan C Hutchinson
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Venkat S Malladi
- Department of Bioinformatics, UT Southwestern Medical Center, Dallas, TX, USA
| | - Claus G Roehrborn
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Chad M Vezina
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Douglas W Strand
- Department of Urology, UT Southwestern Medical Center, Dallas, TX, USA
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England AR, Chaney CP, Das A, Patel M, Malewska A, Armendariz D, Hon GC, Strand DW, Drake KA, Carroll TJ. Identification and characterization of cellular heterogeneity within the developing renal interstitium. Development 2020; 147:dev190108. [PMID: 32586976 PMCID: PMC7438011 DOI: 10.1242/dev.190108] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 06/08/2020] [Indexed: 12/29/2022]
Abstract
Kidney formation requires the coordinated growth of multiple cell types including the collecting ducts, nephrons, vasculature and interstitium. There is a long-held belief that interactions between progenitors of the collecting ducts and nephrons are primarily responsible for kidney development. However, over the last several years, it has become increasingly clear that multiple aspects of kidney development require signaling from the interstitium. How the interstitium orchestrates these various roles is poorly understood. Here, we show that during development the interstitium is a highly heterogeneous patterned population of cells that occupies distinct positions correlated to the adjacent parenchyma. Our analysis indicates that the heterogeneity is not a mere reflection of different stages in a linear developmental trajectory but instead represents several novel differentiated cell states. Further, we find that β-catenin has a cell autonomous role in the development of a medullary subset of the interstitium and that this non-autonomously affects the development of the adjacent epithelia. These findings suggest the intriguing possibility that the different interstitial subtypes may create microenvironments that play unique roles in development of the adjacent epithelia and endothelia.
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Affiliation(s)
- Alicia R England
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Internal Medicine, Division of Nephrology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Christopher P Chaney
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Internal Medicine, Division of Nephrology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Amrita Das
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Mohita Patel
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Division of Pediatric Nephrology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Alicia Malewska
- Department of Urology, University of Texas, Southwestern Medical Center, Dallas, TX 75390, USA
| | - Daniel Armendariz
- Laboratory of Regulatory Genomics, Cecil H. and Ida Green Center for Reproductive Biology Sciences, Division of Basic Reproductive Biology Research, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Gary C Hon
- Laboratory of Regulatory Genomics, Cecil H. and Ida Green Center for Reproductive Biology Sciences, Division of Basic Reproductive Biology Research, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Douglas W Strand
- Department of Urology, University of Texas, Southwestern Medical Center, Dallas, TX 75390, USA
| | - Keri A Drake
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Division of Pediatric Nephrology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Thomas J Carroll
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Internal Medicine, Division of Nephrology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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5
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Joseph DB, Henry GH, Malewska A, Iqbal NS, Ruetten HM, Turco AE, Abler LL, Sandhu SK, Cadena MT, Malladi VS, Reese JC, Mauck RJ, Gahan JC, Hutchinson RC, Roehrborn CG, Baker LA, Vezina CM, Strand DW. Urethral luminal epithelia are castration-insensitive cells of the proximal prostate. Prostate 2020; 80:872-884. [PMID: 32497356 PMCID: PMC7339731 DOI: 10.1002/pros.24020] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 05/11/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND Castration-insensitive epithelial progenitors capable of regenerating the prostate have been proposed to be concentrated in the proximal region based on facultative assays. Functional characterization of prostate epithelial populations isolated with individual cell surface markers has failed to provide a consensus on the anatomical and transcriptional identity of proximal prostate progenitors. METHODS Here, we use single-cell RNA sequencing to obtain a complete transcriptomic profile of all epithelial cells in the mouse prostate and urethra to objectively identify cellular subtypes. Pan-transcriptomic comparison to human prostate cell types identified a mouse equivalent of human urethral luminal cells, which highly expressed putative prostate progenitor markers. Validation of the urethral luminal cell cluster was performed using immunostaining and flow cytometry. RESULTS Our data reveal that previously identified facultative progenitors marked by Trop2, Sca-1, KRT4, and PSCA are actually luminal epithelial cells of the urethra that extend into the proximal region of the prostate, and are resistant to castration-induced androgen deprivation. Mouse urethral luminal cells were identified to be the equivalent of previously identified human club and hillock cells that similarly extend into proximal prostate ducts. Benign prostatic hyperplasia (BPH) has long been considered an "embryonic reawakening," but the cellular origin of the hyperplastic growth concentrated in the periurethral region is unclear. We demonstrate an increase in urethral luminal cells within glandular nodules from BPH patients. Urethral luminal cells are further increased in patients treated with a 5-α reductase inhibitor. CONCLUSIONS Our data demonstrate that cells of the proximal prostate that express putative progenitor markers, and are enriched by castration in the proximal prostate, are urethral luminal cells and that these cells may play an important role in the etiology of human BPH.
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Affiliation(s)
- Diya B. Joseph
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
| | - Gervaise H. Henry
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
- Department of Bioinformatics, UT Southwestern Medical Center, Dallas, Texas
| | - Alicia Malewska
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
| | - Nida S. Iqbal
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
| | - Hannah M. Ruetten
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Anne E. Turco
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Lisa L. Abler
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Simran K. Sandhu
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Mark T. Cadena
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Venkat S. Malladi
- Department of Bioinformatics, UT Southwestern Medical Center, Dallas, Texas
| | | | - Ryan J. Mauck
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
| | - Jeffrey C. Gahan
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
| | | | | | - Linda A. Baker
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
| | - Chad M. Vezina
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Douglas W. Strand
- Department of Urology, UT Southwestern Medical Center, Dallas, Texas
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Henry GH, Malewska A, Joseph DB, Malladi VS, Lee J, Torrealba J, Mauck RJ, Gahan JC, Raj GV, Roehrborn CG, Hon GC, MacConmara MP, Reese JC, Hutchinson RC, Vezina CM, Strand DW. A Cellular Anatomy of the Normal Adult Human Prostate and Prostatic Urethra. Cell Rep 2019; 25:3530-3542.e5. [PMID: 30566875 PMCID: PMC6411034 DOI: 10.1016/j.celrep.2018.11.086] [Citation(s) in RCA: 155] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 10/17/2018] [Accepted: 11/20/2018] [Indexed: 11/30/2022] Open
Abstract
A comprehensive cellular anatomy of normal human prostate is essential for solving the cellular origins of benign prostatic hyperplasia and prostate cancer. The tools used to analyze the contribution of individual cell types are not robust. We provide a cellular atlas of the young adult human prostate and prostatic urethra using an iterative process of single-cell RNA sequencing (scRNA-seq) and flow cytometry on ~98,000 cells taken from different anatomical regions. Immunohistochemistry with newly derived cell type-specific markers revealed the distribution of each epithelial and stromal cell type on whole mounts, revising our understanding of zonal anatomy. Based on discovered cell surface markers, flow cytometry antibody panels were designed to improve the purification of each cell type, with each gate confirmed by scRNA-seq. The molecular classification, anatomical distribution, and purification tools for each cell type in the human prostate create a powerful resource for experimental design in human prostate disease. Using single-cell RNA sequencing, immunofluorescence, and flow cytometry, Henry et al. create a cellular anatomy of the normal human prostate and provide the tools to identify, isolate, and localize every cell type. They identify two additional epithelial cell types enriched in the prostatic urethra and proximal prostatic ducts.
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Affiliation(s)
- Gervaise H Henry
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Alicia Malewska
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Diya B Joseph
- Department of Comparative Biosciences, University of Wisconsin School of Veterinary Medicine, Madison, WI 53706, USA
| | - Venkat S Malladi
- Department of Bioinformatics, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jeon Lee
- Department of Bioinformatics, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jose Torrealba
- Department of Pathology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Ryan J Mauck
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jeffrey C Gahan
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Ganesh V Raj
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Claus G Roehrborn
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Gary C Hon
- Cecil H. and Ida Green Center for Reproductive Biology Sciences, Department of Obstetrics and Gynecology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | | | | | - Ryan C Hutchinson
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Chad M Vezina
- Department of Comparative Biosciences, University of Wisconsin School of Veterinary Medicine, Madison, WI 53706, USA
| | - Douglas W Strand
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390, USA.
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7
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Gerhauser C, Favero F, Risch T, Simon R, Feuerbach L, Assenov Y, Heckmann D, Sidiropoulos N, Waszak SM, Hübschmann D, Urbanucci A, Girma EG, Kuryshev V, Klimczak LJ, Saini N, Stütz AM, Weichenhan D, Böttcher LM, Toth R, Hendriksen JD, Koop C, Lutsik P, Matzk S, Warnatz HJ, Amstislavskiy V, Feuerstein C, Raeder B, Bogatyrova O, Schmitz EM, Hube-Magg C, Kluth M, Huland H, Graefen M, Lawerenz C, Henry GH, Yamaguchi TN, Malewska A, Meiners J, Schilling D, Reisinger E, Eils R, Schlesner M, Strand DW, Bristow RG, Boutros PC, von Kalle C, Gordenin D, Sültmann H, Brors B, Sauter G, Plass C, Yaspo ML, Korbel JO, Schlomm T, Weischenfeldt J. Molecular Evolution of Early-Onset Prostate Cancer Identifies Molecular Risk Markers and Clinical Trajectories. Cancer Cell 2018; 34:996-1011.e8. [PMID: 30537516 PMCID: PMC7444093 DOI: 10.1016/j.ccell.2018.10.016] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 08/17/2018] [Accepted: 10/29/2018] [Indexed: 12/28/2022]
Abstract
Identifying the earliest somatic changes in prostate cancer can give important insights into tumor evolution and aids in stratifying high- from low-risk disease. We integrated whole genome, transcriptome and methylome analysis of early-onset prostate cancers (diagnosis ≤55 years). Characterization across 292 prostate cancer genomes revealed age-related genomic alterations and a clock-like enzymatic-driven mutational process contributing to the earliest mutations in prostate cancer patients. Our integrative analysis identified four molecular subgroups, including a particularly aggressive subgroup with recurrent duplications associated with increased expression of ESRP1, which we validate in 12,000 tissue microarray tumors. Finally, we combined the patterns of molecular co-occurrence and risk-based subgroup information to deconvolve the molecular and clinical trajectories of prostate cancer from single patient samples.
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Affiliation(s)
- Clarissa Gerhauser
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Francesco Favero
- Finsen Laboratory, Rigshospitalet, DK-2200, Copenhagen, Denmark; Biotech Research & Innovation Centre (BRIC), University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Thomas Risch
- Max Planck Institute for Molecular Genetics, Otto Warburg Laboratory Gene Regulation and Systems Biology of Cancer, Ihnestrasse 63-73, 14195 Berlin, Germany
| | - Ronald Simon
- Department of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Lars Feuerbach
- Division Applied Bioinformatics, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Yassen Assenov
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Doreen Heckmann
- Division of Cancer Genome Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; German Cancer Consortium (DKTK), 69120 Heidelberg, Germany
| | - Nikos Sidiropoulos
- Finsen Laboratory, Rigshospitalet, DK-2200, Copenhagen, Denmark; Biotech Research & Innovation Centre (BRIC), University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Sebastian M Waszak
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, 69120 Heidelberg, Germany
| | - Daniel Hübschmann
- Division of Theoretical Bioinformatics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; Department for Bioinformatics and Functional Genomics, Institute of Pharmacy and Molecular Biotechnology and Bioquant, University of Heidelberg, Heidelberg 69120, Germany; Department of Pediatric Immunology, Hematology and Oncology, University Hospital, Heidelberg 69120, Germany
| | - Alfonso Urbanucci
- Centre for Molecular Medicine Norway, Nordic European Molecular Biology Laboratory Partnership, Forskningsparken, University of Oslo, 0316 Oslo, Norway; Institute for Cancer Genetics and Informatics, Oslo University Hospital, 0316 Oslo, Norway; Department of Core Facilities, Institute for Cancer Research, Oslo University Hospital, 0316 Oslo, Norway
| | - Etsehiwot G Girma
- Finsen Laboratory, Rigshospitalet, DK-2200, Copenhagen, Denmark; Biotech Research & Innovation Centre (BRIC), University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Vladimir Kuryshev
- Division of Cancer Genome Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; German Cancer Consortium (DKTK), 69120 Heidelberg, Germany
| | - Leszek J Klimczak
- Integrative Bioinformatics Support Group, National Institute of Environmental Health Sciences, Durham, 27709 NC, USA
| | - Natalie Saini
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, Durham, 27709 NC, USA
| | - Adrian M Stütz
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, 69120 Heidelberg, Germany
| | - Dieter Weichenhan
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Lisa-Marie Böttcher
- Department of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Reka Toth
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Josephine D Hendriksen
- Finsen Laboratory, Rigshospitalet, DK-2200, Copenhagen, Denmark; Biotech Research & Innovation Centre (BRIC), University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Christina Koop
- Department of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Pavlo Lutsik
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Sören Matzk
- Max Planck Institute for Molecular Genetics, Otto Warburg Laboratory Gene Regulation and Systems Biology of Cancer, Ihnestrasse 63-73, 14195 Berlin, Germany
| | - Hans-Jörg Warnatz
- Max Planck Institute for Molecular Genetics, Otto Warburg Laboratory Gene Regulation and Systems Biology of Cancer, Ihnestrasse 63-73, 14195 Berlin, Germany
| | - Vyacheslav Amstislavskiy
- Max Planck Institute for Molecular Genetics, Otto Warburg Laboratory Gene Regulation and Systems Biology of Cancer, Ihnestrasse 63-73, 14195 Berlin, Germany
| | - Clarissa Feuerstein
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany
| | - Benjamin Raeder
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, 69120 Heidelberg, Germany
| | - Olga Bogatyrova
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | | | - Claudia Hube-Magg
- Department of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Martina Kluth
- Department of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Hartwig Huland
- Martini-Clinic Prostate Cancer Center at the University Medical Center Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - Markus Graefen
- Martini-Clinic Prostate Cancer Center at the University Medical Center Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - Chris Lawerenz
- Division of Theoretical Bioinformatics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Gervaise H Henry
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390-9110, USA
| | - Takafumi N Yamaguchi
- Informatics & Biocomputing Program, Ontario Institute for Cancer Research, Toronto, Canada
| | - Alicia Malewska
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390-9110, USA
| | - Jan Meiners
- Department of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Daniela Schilling
- Division of Cancer Genome Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; NCT Trial Center, National Center for Tumor Diseases and German Cancer Research Center, 69120 Heidelberg, Germany
| | - Eva Reisinger
- Division of Theoretical Bioinformatics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Roland Eils
- Division of Theoretical Bioinformatics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; Department for Bioinformatics and Functional Genomics, Institute of Pharmacy and Molecular Biotechnology and Bioquant, University of Heidelberg, Heidelberg 69120, Germany
| | - Matthias Schlesner
- Division of Theoretical Bioinformatics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; Bioinformatics and Omics Data Analytics (B240), German Cancer Research Center (DKFZ), Heidelberg 69120, Germany
| | - Douglas W Strand
- Department of Urology, UT Southwestern Medical Center, Dallas, TX 75390-9110, USA
| | - Robert G Bristow
- Manchester Cancer Research Centre, University of Manchester, 555 Wilmslow Road, Manchester, UK
| | - Paul C Boutros
- Ontario Institute for Cancer Research, Toronto, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Christof von Kalle
- German Cancer Consortium (DKTK), 69120 Heidelberg, Germany; Division of Translational Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Dmitry Gordenin
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, Durham, 27709 NC, USA
| | - Holger Sültmann
- Division of Cancer Genome Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; German Cancer Consortium (DKTK), 69120 Heidelberg, Germany
| | - Benedikt Brors
- Division Applied Bioinformatics, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany; National Center for Tumor Diseases (NCT), 69120 Heidelberg, Germany; German Cancer Consortium (DKTK), 69120 Heidelberg, Germany
| | - Guido Sauter
- Department of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Christoph Plass
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; German Cancer Consortium (DKTK), 69120 Heidelberg, Germany
| | - Marie-Laure Yaspo
- Max Planck Institute for Molecular Genetics, Otto Warburg Laboratory Gene Regulation and Systems Biology of Cancer, Ihnestrasse 63-73, 14195 Berlin, Germany
| | - Jan O Korbel
- European Molecular Biology Laboratory (EMBL), Genome Biology Unit, 69120 Heidelberg, Germany.
| | - Thorsten Schlomm
- Martini-Clinic Prostate Cancer Center at the University Medical Center Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany; Charité Universitätsmedizin Berlin, Charitéplatz 1, D-10117 Berlin, Germany.
| | - Joachim Weischenfeldt
- Finsen Laboratory, Rigshospitalet, DK-2200, Copenhagen, Denmark; Biotech Research & Innovation Centre (BRIC), University of Copenhagen, DK-2200, Copenhagen, Denmark; European Molecular Biology Laboratory (EMBL), Genome Biology Unit, 69120 Heidelberg, Germany; Charité Universitätsmedizin Berlin, Charitéplatz 1, D-10117 Berlin, Germany.
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Henry G, Malewska A, Mauck R, Gahan J, Hutchinson R, Torrealba J, Francis F, Roehrborn C, Strand D. Molecular pathogenesis of human prostate basal cell hyperplasia. Prostate 2017; 77:1344-1355. [PMID: 28795417 PMCID: PMC5580247 DOI: 10.1002/pros.23394] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 07/12/2017] [Indexed: 11/09/2022]
Abstract
BACKGROUND Understanding the molecular pathogenesis of distinct phenotypes in human benign prostatic hyperplasia (BPH) is essential to improving therapeutic intervention. Current therapies target smooth muscle and luminal epithelia for relief of lower urinary tract symptoms (LUTS) due to BPH, but basal cell hyperplasia (BCH) remains untargeted. The incidence of has been reported at 8-10%, but a molecular and cellular characterization has not been performed on this phenotype. METHODS Using freshly digested tissue from surgical specimens, we performed RNA-seq analysis of flow cytometry-purified basal epithelia from 3 patients with and 4 patients without a majority BCH phenotype. qPCR was performed on 28 genes identified as significant from 13 non-BCH and 7 BCH specimens to confirm transcriptomic analysis. IHC was performed on several non-BCH and BCH specimens for 3 proteins identified as significant by transcriptomic analysis. RESULTS A total of 141 human BPH specimens were analyzed for the presence of BCH. Clinical characteristics of non-BCH and BCH cohorts revealed no significant differences in age, PSA, prostate volume, medical treatment, or comorbidities. Quantitation of cellular subsets by flow cytometry in 11 BCH patients vs. 11 non-BCH patients demonstrated a significant increase in the ratio of basal to luminal epithelia in patients with BCH (P <0.05), but no significant differences in the total number of leukocytes. RNA-seq data from flow cytometry isolated basal epithelia from patients with and without BCH were subjected to gene set enrichment analysis of differentially expressed genes, which revealed increased expression of members of the epidermal differentiation complex. Transcriptomic data were complemented by immunohistochemistry for members of the epidermal differentiation complex, revealing a morphological similarity to other stratified squamous epithelial layers. CONCLUSIONS Increased expression of epidermal differentiation complex members and altered epithelial stratification resembles the progression of other metaplastic diseases. These data provide insight into the plasticity of the human prostate epithelium and suggest a classification of basal cell hyperplasia as a metaplasia.
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Affiliation(s)
- Gervaise Henry
- Department of Urology, UT Southwestern Medical Center, Dallas,
Texas
| | - Alicia Malewska
- Department of Urology, UT Southwestern Medical Center, Dallas,
Texas
| | - Ryan Mauck
- Department of Urology, UT Southwestern Medical Center, Dallas,
Texas
| | - Jeffrey Gahan
- Department of Urology, UT Southwestern Medical Center, Dallas,
Texas
| | - Ryan Hutchinson
- Department of Urology, UT Southwestern Medical Center, Dallas,
Texas
| | - Jose Torrealba
- Department of Pathology, UT Southwestern Medical Center, Dallas,
Texas
| | - Franto Francis
- Department of Pathology, UT Southwestern Medical Center, Dallas,
Texas
| | - Claus Roehrborn
- Department of Urology, UT Southwestern Medical Center, Dallas,
Texas
| | - Douglas Strand
- Department of Urology, UT Southwestern Medical Center, Dallas,
Texas
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9
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Zhang B, Kwon OJ, Henry G, Malewska A, Wei X, Zhang L, Brinkley W, Zhang Y, Castro PD, Titus M, Chen R, Sayeeduddin M, Raj GV, Mauck R, Roehrborn C, Creighton CJ, Strand DW, Ittmann MM, Xin L. Non-Cell-Autonomous Regulation of Prostate Epithelial Homeostasis by Androgen Receptor. Mol Cell 2016; 63:976-89. [PMID: 27594448 DOI: 10.1016/j.molcel.2016.07.025] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 06/08/2016] [Accepted: 07/28/2016] [Indexed: 12/22/2022]
Abstract
Prostate inflammation has been suggested as an etiology for benign prostatic hyperplasia (BPH). We show that decreased expression of the androgen receptor (AR) in luminal cells of human BPH specimens correlates with a higher degree of regional prostatic inflammation. However, the cause-and-effect relationship between the two events remains unclear. We investigated specifically whether attenuating AR activity in prostate luminal cells induces inflammation. Disrupting luminal cell AR signaling in mouse models promotes cytokine production cell-autonomously, impairs epithelial barrier function, and induces immune cell infiltration, which further augments local production of cytokines and chemokines including Il-1 and Ccl2. This inflammatory microenvironment promotes AR-independent prostatic epithelial proliferation, which can be abolished by ablating IL-1 signaling or depleting its major cellular source, the macrophages. This study demonstrates that disrupting luminal AR signaling promotes prostate inflammation, which may serve as a mechanism for resistance to androgen-targeted therapy for prostate-related diseases.
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Affiliation(s)
- Boyu Zhang
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Oh-Joon Kwon
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Gervaise Henry
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Alicia Malewska
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Xing Wei
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Li Zhang
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - William Brinkley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yiqun Zhang
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Patricia D Castro
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Mark Titus
- Department of Genitourinary Medical Oncology, UT MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Mohammad Sayeeduddin
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ganesh V Raj
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Ryan Mauck
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Claus Roehrborn
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Chad J Creighton
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Douglas W Strand
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Michael M Ittmann
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA; Michael E. DeBakey Department of Veterans Affairs Medical Center, Houston, TX 77030, USA
| | - Li Xin
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA.
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10
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11
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Olszañska B, Malewska A. Maternal RNA of the avian oocyte - its localisation and metabolism. Br Poult Sci 2000. [DOI: 10.1080/00071660050148679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Abstract
Accumulation of total RNA and poly(A+)RNA was determined in the oocytes of Japanese quail (Coturnix coturnix japonica) during oogenesis, by a standard spectrophotometric method, after RNA extraction. Intensive RNA accumulation was observed in the oocytes 0.25-2.0 mm in diameter (correlated with the presence of lampbrush chromosomes), followed by a plateau in 2.0-3.0 mm oocytes (correlated with the condensation of lampbrush chromosomes). Resumption of the RNA accumulation in the 3.0-5.0 mm oocytes is interpreted as a result of external RNA delivery by the granulosa cells. Most of the RNA (approximately 3/4, 3-4 micrograms) contained in the ovulated oocyte was found under the vitelline membrane surrounding the yolk. This RNA has been designated as 'extraembryonic RNA', as it is located outside the germinal disc region where the embryo is formed. The extraembryonic RNA is rapidly degraded within 24 h, from ovulation until oviposition, during egg passage through the oviduct, while the RNA present in a germinal disc (approximately 1.1 micrograms) is stable. In bird oocytes the presence of two, territorially separated pools of RNA has been postulated: one contained in a germinal disc and needed for early embryo development, and the second present in the cytoplasmic layer around the yolk supporting oocyte growth and development during oogenesis.
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Affiliation(s)
- A Malewska
- Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Warsaw, Poland
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13
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Abstract
1. An in vitro system for ovulation and maturation of Japanese quail oocytes is described. 2. Ovarian follicles removed from the ovary at 2, 4 or 6 h before the estimated time of ovulation may ovulate under in vitro conditions. 3. The presence of progesterone in the medium had a stimulatory effect on the process of maturation, as has been shown for Xenopus oocytes.
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Affiliation(s)
- B Olszańska
- Institute of Genetics and Animal Breeding of the Polish Academy of Sciences, Jastrzebiec, n/Warsaw, Poland
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14
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Abstract
The presence of RNase A activity was studied in vitro in homogenates of quail oocytes and early embryos using [3H]poly(U) as a substrate. The activity was measured by adsorption of the undegraded substrate onto DE-81 filter paper discs and by chromatographic separation on a Sephadex G-50 column. RNase A activity examined by these methods was almost undetectable in quail previtellogenic, vitellogenic and ovulated oocytes as well as in the embryos from laid eggs. It is estimated to be about 1.1 x 10(-5) Kunitz units per ovulated oocyte. Higher activity starts to appear in gastrulating embryos. These findings are discussed in relation to other studies demonstrating the high stability of maternal RNA during early development, especially in growing oocytes.
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Affiliation(s)
- U Stepińska
- Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Mroków, Poland
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