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Reyna J, Fetter K, Ignacio R, Marandi CCA, Rao N, Jiang Z, Figueroa DS, Bhattacharyya S, Ay F. Loop Catalog: a comprehensive HiChIP database of human and mouse samples. bioRxiv 2024:2024.04.26.591349. [PMID: 38746164 PMCID: PMC11092438 DOI: 10.1101/2024.04.26.591349] [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: 05/16/2024]
Abstract
HiChIP enables cost-effective and high-resolution profiling of regulatory and structural loops. To leverage the increasing number of publicly available HiChIP datasets from diverse cell lines and primary cells, we developed the Loop Catalog (https://loopcatalog.lji.org), a web-based database featuring HiChIP loop calls for 1319 samples across 133 studies and 44 high-resolution Hi-C loop calls. We demonstrate its utility in interpreting fine-mapped GWAS variants (SNP-to-gene linking), in identifying enriched sequence motifs and motif pairs at loop anchors, and in network-level analysis of loops connecting regulatory elements (community detection). Our comprehensive catalog, spanning over 4M unique 5kb loops, along with the accompanying analysis modalities constitutes an important resource for studies in gene regulation and genome organization.
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Affiliation(s)
- Joaquin Reyna
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
- Bioinformatics and Systems Biology Graduate Program University of California, San Diego, La Jolla, CA 92093 USA
| | - Kyra Fetter
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
- Department of Bioengineering, University of California San Diego, La Jolla, CA 92093 USA
| | - Romeo Ignacio
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
| | - Cemil Can Ali Marandi
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
- Bioinformatics and Systems Biology Graduate Program University of California, San Diego, La Jolla, CA 92093 USA
| | - Nikhil Rao
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
- Department of Computer Science and Engineering, University of California San Diego, La Jolla, CA 92093 USA
| | - Zichen Jiang
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
- Department of Mathematics, University of California San Diego, La Jolla, CA 92093 USA
| | - Daniela Salgado Figueroa
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
- Bioinformatics and Systems Biology Graduate Program University of California, San Diego, La Jolla, CA 92093 USA
| | - Sourya Bhattacharyya
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
| | - Ferhat Ay
- Centers for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA 92037 USA
- Bioinformatics and Systems Biology Graduate Program University of California, San Diego, La Jolla, CA 92093 USA
- Department of Pediatrics, University of California San Diego, La Jolla, CA 92093 USA
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2
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Shinde P, Soldevila F, Reyna J, Aoki M, Rasmussen M, Willemsen L, Kojima M, Ha B, Greenbaum JA, Overton JA, Guzman-Orozco H, Nili S, Orfield S, Gygi JP, da Silva Antunes R, Sette A, Grant B, Olsen LR, Konstorum A, Guan L, Ay F, Kleinstein SH, Peters B. A multi-omics systems vaccinology resource to develop and test computational models of immunity. Cell Rep Methods 2024; 4:100731. [PMID: 38490204 PMCID: PMC10985234 DOI: 10.1016/j.crmeth.2024.100731] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/04/2024] [Accepted: 02/20/2024] [Indexed: 03/17/2024]
Abstract
Systems vaccinology studies have identified factors affecting individual vaccine responses, but comparing these findings is challenging due to varying study designs. To address this lack of reproducibility, we established a community resource for comparing Bordetella pertussis booster responses and to host annual contests for predicting patients' vaccination outcomes. We report here on our experiences with the "dry-run" prediction contest. We found that, among 20+ models adopted from the literature, the most successful model predicting vaccination outcome was based on age alone. This confirms our concerns about the reproducibility of conclusions between different vaccinology studies. Further, we found that, for newly trained models, handling of baseline information on the target variables was crucial. Overall, multiple co-inertia analysis gave the best results of the tested modeling approaches. Our goal is to engage community in these prediction challenges by making data and models available and opening a public contest in August 2024.
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Affiliation(s)
- Pramod Shinde
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Ferran Soldevila
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Joaquin Reyna
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA; Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, San Diego, CA, USA
| | - Minori Aoki
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Mikkel Rasmussen
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA; Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Lisa Willemsen
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Mari Kojima
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Brendan Ha
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Jason A Greenbaum
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - James A Overton
- Knocean Inc., 107 Quebec Avenue, Toronto, Ontario M6P 2T3, Canada
| | - Hector Guzman-Orozco
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Somayeh Nili
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Shelby Orfield
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Jeremy P Gygi
- Program in Computational Biology & Bioinformatics, Yale University, New Haven, CT, USA
| | - Ricardo da Silva Antunes
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Alessandro Sette
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA; Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Barry Grant
- Department of Molecular Biology, School of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Lars Rønn Olsen
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Anna Konstorum
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Leying Guan
- Department of Biostatistics, Yale School of Public Health, New Haven, CT, USA
| | - Ferhat Ay
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA; Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Steven H Kleinstein
- Program in Computational Biology & Bioinformatics, Yale University, New Haven, CT, USA; Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Bjoern Peters
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA; Department of Medicine, University of California, San Diego, San Diego, CA, USA.
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3
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Shinde P, Soldevila F, Reyna J, Aoki M, Rasmussen M, Willemsen L, Kojima M, Ha B, Greenbaum JA, Overton JA, Guzman-Orozco H, Nili S, Orfield S, Gygi JP, da Silva Antunes R, Sette A, Grant B, Olsen LR, Konstorum A, Guan L, Ay F, Kleinstein SH, Peters B. A systems vaccinology resource to develop and test computational models of immunity. bioRxiv 2023:2023.08.28.555193. [PMID: 37693565 PMCID: PMC10491180 DOI: 10.1101/2023.08.28.555193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Computational models that predict an individual's response to a vaccine offer the potential for mechanistic insights and personalized vaccination strategies. These models are increasingly derived from systems vaccinology studies that generate immune profiles from human cohorts pre- and post-vaccination. Most of these studies involve relatively small cohorts and profile the response to a single vaccine. The ability to assess the performance of the resulting models would be improved by comparing their performance on independent datasets, as has been done with great success in other areas of biology such as protein structure predictions. To transfer this approach to system vaccinology studies, we established a prototype platform that focuses on the evaluation of Computational Models of Immunity to Pertussis Booster vaccinations (CMI-PB). A community resource, CMI-PB generates experimental data for the explicit purpose of model evaluation, which is performed through a series of annual data releases and associated contests. We here report on our experience with the first such 'dry run' for a contest where the goal was to predict individual immune responses based on pre-vaccination multi-omic profiles. Over 30 models adopted from the literature were tested, but only one was predictive, and was based on age alone. The performance of new models built using CMI-PB training data was much better, but varied significantly based on the choice of pre-vaccination features used and the model building strategy. This suggests that previously published models developed for other vaccines do not generalize well to Pertussis Booster vaccination. Overall, these results reinforced the need for comparative analysis across models and datasets that CMI-PB aims to achieve. We are seeking wider community engagement for our first public prediction contest, which will open in early 2024.
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Affiliation(s)
- Pramod Shinde
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Ferran Soldevila
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Joaquin Reyna
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, CA, USA
| | - Minori Aoki
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Mikkel Rasmussen
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Lisa Willemsen
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Mari Kojima
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Brendan Ha
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Jason A Greenbaum
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - James A Overton
- Knocean Inc., 107 Quebec Ave. Toronto, Ontario, M6P 2T3, Canada
| | - Hector Guzman-Orozco
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Somayeh Nili
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Shelby Orfield
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Jeremy P. Gygi
- Program in Computational Biology & Bioinformatics, Yale University, New Haven, CT, USA
| | - Ricardo da Silva Antunes
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Alessandro Sette
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
- Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Barry Grant
- Department of Molecular Biology, School of Biological Sciences, University of California San Diego, La Jolla, California, USA
| | - Lars Rønn Olsen
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Anna Konstorum
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Leying Guan
- Department of Biostatistics, Yale School of Public Health, New Haven, CT, USA
| | - Ferhat Ay
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
- Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Steven H. Kleinstein
- Program in Computational Biology & Bioinformatics, Yale University, New Haven, CT, USA
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Bjoern Peters
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA, USA
- Department of Medicine, University of California, San Diego, San Diego, CA, USA
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4
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Dozmorov MG, Marshall MA, Rashid NS, Grible JM, Valentine A, Olex AL, Murthy K, Chakraborty A, Reyna J, Figueroa DS, Hinojosa-Gonzalez L, Da-Inn Lee E, Baur BA, Roy S, Ay F, Harrell JC. Publisher Correction: Rewiring of the 3D genome during acquisition of carboplatin resistance in a triple-negative breast cancer patient-derived xenograft. Sci Rep 2023; 13:7522. [PMID: 37160896 PMCID: PMC10170154 DOI: 10.1038/s41598-023-33284-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023] Open
Affiliation(s)
- Mikhail G Dozmorov
- Department of Biostatistics, Virginia Commonwealth University, Richmond, VA, 23298, USA.
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA.
| | - Maggie A Marshall
- Department of Biostatistics, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Narmeen S Rashid
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA
- Department of Biology, University of Richmond, Richmond, VA, 23173, USA
| | - Jacqueline M Grible
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Aaron Valentine
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA
- Department of Biochemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Amy L Olex
- C. Kenneth and Dianne Wright Center for Clinical and Translational Research, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Kavita Murthy
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Abhijit Chakraborty
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Joaquin Reyna
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Daniela Salgado Figueroa
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Laura Hinojosa-Gonzalez
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Erika Da-Inn Lee
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Brittany A Baur
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Sushmita Roy
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Ferhat Ay
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
- Department of Pediatrics, UC San Diego-School of Medicine, La Jolla, CA, 92093, USA
| | - J Chuck Harrell
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA.
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5
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Dozmorov MG, Marshall MA, Rashid NS, Grible JM, Valentine A, Olex AL, Murthy K, Chakraborty A, Reyna J, Figueroa DS, Hinojosa-Gonzalez L, Da-Inn Lee E, Baur BA, Roy S, Ay F, Harrell JC. Rewiring of the 3D genome during acquisition of carboplatin resistance in a triple-negative breast cancer patient-derived xenograft. Sci Rep 2023; 13:5420. [PMID: 37012431 PMCID: PMC10070455 DOI: 10.1038/s41598-023-32568-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 03/29/2023] [Indexed: 04/05/2023] Open
Abstract
Changes in the three-dimensional (3D) structure of the genome are an emerging hallmark of cancer. Cancer-associated copy number variants and single nucleotide polymorphisms promote rewiring of chromatin loops, disruption of topologically associating domains (TADs), active/inactive chromatin state switching, leading to oncogene expression and silencing of tumor suppressors. However, little is known about 3D changes during cancer progression to a chemotherapy-resistant state. We integrated chromatin conformation capture (Hi-C), RNA-seq, and whole-genome sequencing obtained from triple-negative breast cancer patient-derived xenograft primary tumors (UCD52) and carboplatin-resistant samples and found increased short-range (< 2 Mb) interactions, chromatin looping, formation of TAD, chromatin state switching into a more active state, and amplification of ATP-binding cassette transporters. Transcriptome changes suggested the role of long-noncoding RNAs in carboplatin resistance. Rewiring of the 3D genome was associated with TP53, TP63, BATF, FOS-JUN family of transcription factors and led to activation of aggressiveness-, metastasis- and other cancer-related pathways. Integrative analysis highlighted increased ribosome biogenesis and oxidative phosphorylation, suggesting the role of mitochondrial energy metabolism. Our results suggest that 3D genome remodeling may be a key mechanism underlying carboplatin resistance.
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Affiliation(s)
- Mikhail G Dozmorov
- Department of Biostatistics, Virginia Commonwealth University, Richmond, VA, 23298, USA.
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA.
| | - Maggie A Marshall
- Department of Biostatistics, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Narmeen S Rashid
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA
- Department of Biology, University of Richmond, Richmond, VA, 23173, USA
| | - Jacqueline M Grible
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Aaron Valentine
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA
- Department of Biochemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA
| | - Amy L Olex
- C. Kenneth and Dianne Wright Center for Clinical and Translational Research, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Kavita Murthy
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Abhijit Chakraborty
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Joaquin Reyna
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Daniela Salgado Figueroa
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Laura Hinojosa-Gonzalez
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Erika Da-Inn Lee
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Brittany A Baur
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Sushmita Roy
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI, 53715, USA
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Ferhat Ay
- Center for Cancer Immunotherapy and Autoimmunity, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
- Department of Pediatrics, UC San Diego-School of Medicine, La Jolla, CA, 92093, USA
| | - J Chuck Harrell
- Department of Pathology, Virginia Commonwealth University, Richmond, VA, 23284, USA.
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6
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Dozmorov M, Marshall M, Rashid N, Grible J, Valentine AD, Olex A, Murthy K, Chakraborty A, Reyna J, Figueroa DS, Lee DI, Baur B, Roy S, Ay F, Harrell C. Abstract P1-13-23: Carboplatin resistance-associated changes in the 3D chromatin landscape of a triple-negative breast cancer Patient-Derived Xenograft. Cancer Res 2023. [DOI: 10.1158/1538-7445.sabcs22-p1-13-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Abstract
Changes in the three-dimensional (3D) structure of the genome are an emerging hallmark of cancer. Cancer-associated copy number variants and single nucleotide polymorphisms promote rewiring of chromatin loops, disruption of topologically associating domains (TADs), active/inactive chromatin state switching, leading to oncogene expression and silencing of tumor suppressors. However, little is known about 3D changes during cancer progression to a chemotherapy-resistant state. We integrated chromatin conformation capture (Hi-C), RNA-seq, and whole-genome sequencing obtained from triple-negative breast cancer patient-derived xenograft primary tumors (UCD52) and carboplatin-resistant samples and found increased short-range (< 2Mb) interactions, chromatin looping, formation of topologically associating domains (TAD), chromatin state switching into a more active state, and amplification of ATP-binding cassette (ABC) transporters. Transcriptome changes suggested the role of long-noncoding RNAs in carboplatin resistance. Rewiring of the 3D genome was associated with TP53, TP63, BATF, FOS-JUN family of transcription factors and led to activation of aggressiveness-, metastasis- and other cancer-related pathways. Integrative analysis highlighted increased ribosome biogenesis and oxidative phosphorylation, suggesting the role of mitochondrial energy metabolism. Our results suggest that 3D genome remodeling may be a key mechanism underlying carboplatin resistance.
Citation Format: Mikhail Dozmorov, Maggie Marshall, Narmeen Rashid, Jacqueline Grible, Aaron D. Valentine, Amy Olex, Kavita Murthy, Abhijit Chakraborty, Joaquin Reyna, Daniela Salgado Figueroa, Da-Inn Lee, Brittany Baur, Sushmita Roy, Ferhat Ay, Chuck Harrell. Carboplatin resistance-associated changes in the 3D chromatin landscape of a triple-negative breast cancer Patient-Derived Xenograft [abstract]. In: Proceedings of the 2022 San Antonio Breast Cancer Symposium; 2022 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2023;83(5 Suppl):Abstract nr P1-13-23.
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Affiliation(s)
| | | | | | | | | | - Amy Olex
- 6Virginia Commonwealth University, C. Kenneth and Diane Wright Center for Clinical and Translational Research
| | | | | | - Joaquin Reyna
- 9La Jolla Institute for Immunology, La Jolla, California
| | | | - Da-Inn Lee
- 11University of Wisconsin-Madison, Madison, Wisconsin
| | | | - Sushmita Roy
- 13University of Wisconsin-Madison, Madison, Wisconsin
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7
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D'Antonio M, Reyna J, Jakubosky D, Donovan MKR, Bonder MJ, Matsui H, Stegle O, Nariai N, D'Antonio-Chronowska A, Frazer KA. Systematic genetic analysis of the MHC region reveals mechanistic underpinnings of HLA type associations with disease. eLife 2019; 8:e48476. [PMID: 31746734 PMCID: PMC6904215 DOI: 10.7554/elife.48476] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 11/19/2019] [Indexed: 02/06/2023] Open
Abstract
The MHC region is highly associated with autoimmune and infectious diseases. Here we conduct an in-depth interrogation of associations between genetic variation, gene expression and disease. We create a comprehensive map of regulatory variation in the MHC region using WGS from 419 individuals to call eight-digit HLA types and RNA-seq data from matched iPSCs. Building on this regulatory map, we explored GWAS signals for 4083 traits, detecting colocalization for 180 disease loci with eQTLs. We show that eQTL analyses taking HLA type haplotypes into account have substantially greater power compared with only using single variants. We examined the association between the 8.1 ancestral haplotype and delayed colonization in Cystic Fibrosis, postulating that downregulation of RNF5 expression is the likely causal mechanism. Our study provides insights into the genetic architecture of the MHC region and pinpoints disease associations that are due to differential expression of HLA genes and non-HLA genes.
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Affiliation(s)
- Matteo D'Antonio
- Institute for Genomic MedicineUniversity of California, San DiegoSan DiegoUnited States
- Department of PediatricsRady Children’s Hospital, University of California, San DiegoSan DiegoUnited States
| | - Joaquin Reyna
- Department of PediatricsRady Children’s Hospital, University of California, San DiegoSan DiegoUnited States
- Biomedical Sciences Graduate ProgramUniversity of California, San DiegoLa JollaUnited States
| | - David Jakubosky
- Biomedical Sciences Graduate ProgramUniversity of California, San DiegoLa JollaUnited States
- Bioinformatics and Systems Biology Graduate ProgramUniversity of California, San DiegoSan DiegoUnited States
| | - Margaret KR Donovan
- Bioinformatics and Systems Biology Graduate ProgramUniversity of California, San DiegoSan DiegoUnited States
- Department of Biomedical InformaticsUniversity of California, San DiegoSan DiegoUnited States
| | - Marc-Jan Bonder
- European Molecular Biology Laboratory, European Bioinformatics InstituteCambridgeUnited Kingdom
| | - Hiroko Matsui
- Institute for Genomic MedicineUniversity of California, San DiegoSan DiegoUnited States
| | - Oliver Stegle
- European Molecular Biology Laboratory, European Bioinformatics InstituteCambridgeUnited Kingdom
| | - Naoki Nariai
- Department of PediatricsRady Children’s Hospital, University of California, San DiegoSan DiegoUnited States
| | - Agnieszka D'Antonio-Chronowska
- Institute for Genomic MedicineUniversity of California, San DiegoSan DiegoUnited States
- Department of PediatricsRady Children’s Hospital, University of California, San DiegoSan DiegoUnited States
| | - Kelly A Frazer
- Institute for Genomic MedicineUniversity of California, San DiegoSan DiegoUnited States
- Department of PediatricsRady Children’s Hospital, University of California, San DiegoSan DiegoUnited States
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Sussman D, Meyer M, Katdare R, Presley C, Bell T, Reyna J, Lakers F, Hamilton C, Zulueta J, Miller Y, Ghosh M, Nelson A. P3.03-026 Cell-CT® Differential Detection of Dysplastic Bronchial Epithelial Cells from Patient Explants. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Panopoulos AD, D'Antonio M, Benaglio P, Williams R, Hashem SI, Schuldt BM, DeBoever C, Arias AD, Garcia M, Nelson BC, Harismendy O, Jakubosky DA, Donovan MKR, Greenwald WW, Farnam K, Cook M, Borja V, Miller CA, Grinstein JD, Drees F, Okubo J, Diffenderfer KE, Hishida Y, Modesto V, Dargitz CT, Feiring R, Zhao C, Aguirre A, McGarry TJ, Matsui H, Li H, Reyna J, Rao F, O'Connor DT, Yeo GW, Evans SM, Chi NC, Jepsen K, Nariai N, Müller FJ, Goldstein LSB, Izpisua Belmonte JC, Adler E, Loring JF, Berggren WT, D'Antonio-Chronowska A, Smith EN, Frazer KA. iPSCORE: A Resource of 222 iPSC Lines Enabling Functional Characterization of Genetic Variation across a Variety of Cell Types. Stem Cell Reports 2017; 8:1086-1100. [PMID: 28410642 PMCID: PMC5390244 DOI: 10.1016/j.stemcr.2017.03.012] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 03/08/2017] [Accepted: 03/13/2017] [Indexed: 11/18/2022] Open
Abstract
Large-scale collections of induced pluripotent stem cells (iPSCs) could serve as powerful model systems for examining how genetic variation affects biology and disease. Here we describe the iPSCORE resource: a collection of systematically derived and characterized iPSC lines from 222 ethnically diverse individuals that allows for both familial and association-based genetic studies. iPSCORE lines are pluripotent with high genomic integrity (no or low numbers of somatic copy-number variants) as determined using high-throughput RNA-sequencing and genotyping arrays, respectively. Using iPSCs from a family of individuals, we show that iPSC-derived cardiomyocytes demonstrate gene expression patterns that cluster by genetic background, and can be used to examine variants associated with physiological and disease phenotypes. The iPSCORE collection contains representative individuals for risk and non-risk alleles for 95% of SNPs associated with human phenotypes through genome-wide association studies. Our study demonstrates the utility of iPSCORE for examining how genetic variants influence molecular and physiological traits in iPSCs and derived cell lines.
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Affiliation(s)
- Athanasia D Panopoulos
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Matteo D'Antonio
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Paola Benaglio
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Roy Williams
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA; Center for Regenerative Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Sherin I Hashem
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Bernhard M Schuldt
- Zentrum für Integrative Psychiatrie, Universitätsklinikum Schleswig-Holstein, 24105 Kiel, Germany
| | - Christopher DeBoever
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Angelo D Arias
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Melvin Garcia
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Bradley C Nelson
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Olivier Harismendy
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - David A Jakubosky
- Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Margaret K R Donovan
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - William W Greenwald
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - KathyJean Farnam
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Megan Cook
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Victor Borja
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Carl A Miller
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jonathan D Grinstein
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Frauke Drees
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jonathan Okubo
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | | | - Yuriko Hishida
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Veronica Modesto
- Stem Cell Core, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Carl T Dargitz
- Stem Cell Core, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Rachel Feiring
- Stem Cell Core, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Chang Zhao
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Aitor Aguirre
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Thomas J McGarry
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hiroko Matsui
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - He Li
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Joaquin Reyna
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Fangwen Rao
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Daniel T O'Connor
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Gene W Yeo
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Sylvia M Evans
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Neil C Chi
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Kristen Jepsen
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Naoki Nariai
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Franz-Josef Müller
- Zentrum für Integrative Psychiatrie, Universitätsklinikum Schleswig-Holstein, 24105 Kiel, Germany
| | - Lawrence S B Goldstein
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | | | - Eric Adler
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jeanne F Loring
- Center for Regenerative Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - W Travis Berggren
- Stem Cell Core, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | | | - Erin N Smith
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Kelly A Frazer
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA.
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DeBoever C, Li H, Jakubosky D, Benaglio P, Reyna J, Olson KM, Huang H, Biggs W, Sandoval E, D'Antonio M, Jepsen K, Matsui H, Arias A, Ren B, Nariai N, Smith EN, D'Antonio-Chronowska A, Farley EK, Frazer KA. Large-Scale Profiling Reveals the Influence of Genetic Variation on Gene Expression in Human Induced Pluripotent Stem Cells. Cell Stem Cell 2017; 20:533-546.e7. [PMID: 28388430 PMCID: PMC5444918 DOI: 10.1016/j.stem.2017.03.009] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [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: 05/07/2016] [Revised: 12/27/2016] [Accepted: 03/15/2017] [Indexed: 12/18/2022]
Abstract
In this study, we used whole-genome sequencing and gene expression profiling of 215 human induced pluripotent stem cell (iPSC) lines from different donors to identify genetic variants associated with RNA expression for 5,746 genes. We were able to predict causal variants for these expression quantitative trait loci (eQTLs) that disrupt transcription factor binding and validated a subset of them experimentally. We also identified copy-number variant (CNV) eQTLs, including some that appear to affect gene expression by altering the copy number of intergenic regulatory regions. In addition, we were able to identify effects on gene expression of rare genic CNVs and regulatory single-nucleotide variants and found that reactivation of gene expression on the X chromosome depends on gene chromosomal position. Our work highlights the value of iPSCs for genetic association analyses and provides a unique resource for investigating the genetic regulation of gene expression in pluripotent cells.
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Affiliation(s)
- Christopher DeBoever
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - He Li
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - David Jakubosky
- Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093-0419, USA; Department of Biomedical Informatics, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Paola Benaglio
- Department of Pediatrics and Rady Children's Hospital, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Joaquin Reyna
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Katrina M Olson
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA; Division of Biological Sciences, Section of Molecular Biology, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Hui Huang
- Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093-0419, USA; Ludwig Institute for Cancer Research, La Jolla, CA 92093, USA
| | | | | | - Matteo D'Antonio
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Kristen Jepsen
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Hiroko Matsui
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Angelo Arias
- Department of Pediatrics and Rady Children's Hospital, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Bing Ren
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA; Ludwig Institute for Cancer Research, La Jolla, CA 92093, USA; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Naoki Nariai
- Department of Pediatrics and Rady Children's Hospital, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | - Erin N Smith
- Department of Pediatrics and Rady Children's Hospital, University of California, San Diego, La Jolla, CA 92093-0419, USA
| | | | - Emma K Farley
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA; Division of Biological Sciences, Section of Molecular Biology, University of California, San Diego, La Jolla, CA 92093-0419, USA.
| | - Kelly A Frazer
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093-0419, USA; Department of Pediatrics and Rady Children's Hospital, University of California, San Diego, La Jolla, CA 92093-0419, USA.
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Wick M, Quinn M, Mangold A, Gamez L, Diaz A, Vaught T, Reyna J, Tolcher A, Rasco D, Patnaik A, Papadopoulos K. Establishment and characterization of a hormone dependent, PSA/PSMA positive prostate PDX model. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32935-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Ibarra FO, Reyna J, Treviño P, Fernandez L, Lara G, Valenzuela E, Morales Y, Limon A, Ceballos A. A standardized protocol for the multiplex PCR technique Septifast® Roche for neonatal samples with suspected sepsis. Crit Care 2012. [PMCID: PMC3504880 DOI: 10.1186/cc11766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Reyna J, Thomson PC, Evans G, Maxwell WMC. Synchrony of ovulation and follicular dynamics in merino ewes treated with GnRH in the breeding and non-breeding seasons. Reprod Domest Anim 2007; 42:410-7. [PMID: 17635779 DOI: 10.1111/j.1439-0531.2006.00800.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The effect of gonadotropin releasing hormone (GnRH) treatment on the time of ovulation and the occurrence of follicular dominance during the non-breeding and breeding seasons (experiment 1), and on fertility after artificial insemination (AI) in the non-breeding season (experiment 2), was examined in Merino ewes. Oestrus was synchronized in 40 nulliparous ewes (experiment 1; n = 20, in the non-breeding and breeding seasons) and in 79 multiparous ewes (experiment 2) using intravaginal sponges and pregnant mare serum gonadotropin. Thirty six hours after sponge removal (SR), half the ewes were injected (i.m.) with 40 microg of synthetic GnRH and the remainder used as controls. GnRH improved the synchrony of ovulation compared with the controls in the breeding (SD = 2.8 vs 5.7 days, p = 0.04) but not the non-breeding season (SD = 3.8 vs 4.4 days, p = 0.69), with ewes ovulating from 42 to 54 h (mean 50.4 +/- 4.08 h) and 42-60 h (mean 54.4 +/- 5.47 h) after SR for GnRH and control, respectively. For both treated and control ewes, ovulation occurred earlier in the non-breeding than the breeding season (50.1 vs 54.6 h; p = 0.002). GnRH had no effect on follicular dominance, as assessed by divergence (D: the time the ovulatory follicle exceeded the average size of the other non-ovulating follicles) or on the interval from D to ovulation (IDO). However, follicular dynamics differed between seasons. The mean follicle diameter increased at a faster rate up to 36 h after SR in the non-breeding compared with the breeding season and then rapidly declined, compared with a later peak (42 h after SR) in mean follicular size during the breeding season. IDO was shorter in the non-breeding than in the breeding season (26.7 +/- 4.30 h vs 39.6 +/- 4.53 h; p = 0.05). In experiment 2, ewes (n = 38 GnRH-treated, n = 40 controls) were inseminated in the uterus by laparoscopy 42 h or 48 h after SR with frozen-thawed sperm. The fertility of ewes treated with GnRH (nine of 39, 23%) was not different to the controls (eight of 38, 21%; p = 0.01). In conclusion the application of GnRH improved synchronization of ovulation but did not improve fertility rates after AI.
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Affiliation(s)
- J Reyna
- Centre for Advanced Technologies in Animal Genetics and Reproduction (ReproGen), Faculty of Veterinary Science, University of Sydney, NSW, Australia
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Reyna J, Ortiz F, Arredondo J, Beltrán M. Asociación entre la colonización materna de Streptococcus del grupo B serotipo III y la rotura prematura de membranes. Clínica e Investigación en Ginecología y Obstetricia 2006. [DOI: 10.1016/s0210-573x(06)74102-8] [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: 10/21/2022]
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Reyna J, Thomson P, Evans G, Maxwell C. 338 SYNCHRONISATION OF OVULATION IN MERINO EWES WITH GnRH IN THE BREEDING AND NON-BREEDING SEASON. Reprod Fertil Dev 2005. [DOI: 10.1071/rdv17n2ab338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The objective was to determine the effect of GnRH as an aid to synchronise the time of ovulation in Merino ewes during the non-breeding and breeding seasons as determined by transrectal ultrasound. Oestrus was synchronized in 20 nulliparous Merino ewes (11–12 months old; 2 replicates of 10 animals) during spring 2003 and autumn 2004 at Camden, NSW, Australia, using FGA sponges for 12 days (30 mg Ovagest, Bioniche Pty. Ltd., Armidale, NSW) and an i.m. injection of 400 IU of PMSG (Pregnecol, Bioniche Pty. Ltd., Armidale, NSW). Ultrasound evaluations of ovaries were recorded on VHS tapes every 12 h for 36 h starting at sponge removal (SR), then half of the animals received an i.m. injection of 40 μg synthetic GnRH (Fertagyl, Intervet Australia Pty. Ltd, Bendigo, VIC) and ultrasound evaluations were conducted every 6 h until 60 h. The positions of the largest follicles were recorded on ovarian maps and their growth was monitored. Time of ovulation was defined as the time of disappearance of the largest follicle from the ovary. Ten days after ovulation, the position and diameter of the CL was confirmed by ultrasound. Comparisons were made between treated and control animals, and between breeding and non-breeding seasons, using t-tests. During the non-breeding season ovulation took place from 42 to 54 h (mean 48 ± 2.83 h) vs. 42 to 60 h (mean 52.2 ± 5.69 h) after SR in GnRH-treated vs. control animals (P < 0.05), respectively. Ovulation was delayed in the breeding compared with the non-breeding season (P < 0.05), starting from 48 to 60 h after SR for treated (52.8 ± 3.79 h) and control animals (57.0 ± 4.24 h; P < 0.05). These results suggest that GnRH synchronized the time of ovulation compared with the controls but the time of ovulation was later in the breeding than in the non-breeding season.
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Abstract
2,3,7,8-tetrachlorododibenzo-p-dioxin (TCDD) is a highly persistent trace environmental contaminant and is one of the most potent toxicants known. Exposure to TCDD has been shown to cause oxidative stress in a variety of animal models. In this study, pregnant Long Evans rats were dosed with 1 microg TCDD/kg on gestational day (GD) 15 so as to investigate oxidative stress in the liver of male pups following gestational exposure to TCDD. Lipid peroxidation (TBARS), production of reactive oxygen species (ROS), and total glutathione (GSH) were assayed to identify changes in oxidative stress parameters in the pup liver at GD 21 and postnatal days (PND) 4, 25, 32, 49, and 63. Mean ROS levels in pups were elevated at all time points tested with a significant elevation at PND 4 and PND 25. However, pup hepatic lipid peroxidation was unchanged throughout the time course. In addition, hepatic total GSH levels were not significantly changed although the means for the TCDD-treated groups were less than those of the controls at all time points except PND 49. The results indicate that although the levels of ROS are increased following gestational/lactational exposure, this increase does not translate to direct oxidative damage or significant changes to endogenous antioxidant defense mechanisms. Further investigation into the effect of gestational/lactational exposure in pups should include additional endpoints for further characterization of the time course of the response, the effect upon extrahepatic tissues, and investigation of differences between male and female offspring.
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Affiliation(s)
- B P Slezak
- Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Flores Carreras O, Cabrera R, Galeano A, Torres E, Contreras J, Cruz H, Reyna J. Long-term follow-up of urethrovesical suspension with the Pereyra technique in the treatment of genuine stress incontinence. Int Urogynecol J 1991. [DOI: 10.1007/bf00376559] [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: 11/29/2022]
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Reyna J, Richardson JM, Mattox DE, Banowsky LH, Nicastro-Lutton JJ. Head and neck infection after renal transplantation. JAMA 1982; 247:3337-9. [PMID: 7045419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Infections of the head and neck were identified in 12 (9%) of 128 consecutive patients undergoing renal transplantation. The infections included sinusitis, otitis media, dental abscess, Ludwig's angina, parotitis, and nasal abscess. A significant correlation was found between the development of infection and juvenile-onset diabetes but not with previous splenectomy. None of the infections occurred during treatment of rejection episodes with corticosteroids. The clinical presentations and microbiologic agents causing the infections were similar to those found in nonimmunosuppressed patients.
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