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Aney KJ, Jeong WJ, Vallejo AF, Burdziak C, Chen E, Wang A, Koak P, Wise K, Jensen K, Pe'er D, Dougan SK, Martelotto L, Nissim S. Novel Approach for Pancreas Transcriptomics Reveals the Cellular Landscape in Homeostasis and Acute Pancreatitis. Gastroenterology 2024; 166:1100-1113. [PMID: 38325760 PMCID: PMC11102849 DOI: 10.1053/j.gastro.2024.01.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 01/27/2024] [Accepted: 01/30/2024] [Indexed: 02/09/2024]
Abstract
BACKGROUND & AIMS Acinar cells produce digestive enzymes that impede transcriptomic characterization of the exocrine pancreas. Thus, single-cell RNA-sequencing studies of the pancreas underrepresent acinar cells relative to histological expectations, and a robust approach to capture pancreatic cell responses in disease states is needed. We sought to innovate a method that overcomes these challenges to accelerate study of the pancreas in health and disease. METHODS We leverage FixNCut, a single-cell RNA-sequencing approach in which tissue is reversibly fixed with dithiobis(succinimidyl propionate) before dissociation and single-cell preparation. We apply FixNCut to an established mouse model of acute pancreatitis, validate findings using GeoMx whole transcriptome atlas profiling, and integrate our data with prior studies to compare our method in both mouse and human pancreas datasets. RESULTS FixNCut achieves unprecedented definition of challenging pancreatic cells, including acinar and immune populations in homeostasis and acute pancreatitis, and identifies changes in all major cell types during injury and recovery. We define the acinar transcriptome during homeostasis and acinar-to-ductal metaplasia and establish a unique gene set to measure deviation from normal acinar identity. We characterize pancreatic immune cells, and analysis of T-cell subsets reveals a polarization of the homeostatic pancreas toward type-2 immunity. We report immune responses during acute pancreatitis and recovery, including early neutrophil infiltration, expansion of dendritic cell subsets, and a substantial shift in the transcriptome of macrophages due to both resident macrophage activation and monocyte infiltration. CONCLUSIONS FixNCut preserves pancreatic transcriptomes to uncover novel cell states during homeostasis and following pancreatitis, establishing a broadly applicable approach and reference atlas for study of pancreas biology and disease.
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Affiliation(s)
- Katherine J Aney
- Biological and Biomedical Sciences Program, Harvard Medical School, Boston, Massachusetts; Health Sciences & Technology Program, Harvard-MIT, Boston, Massachusetts; Genetics Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Woo-Jeong Jeong
- Genetics Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Dana-Farber Cancer Institute, Boston, Massachusetts
| | | | - Cassandra Burdziak
- Computational and Systems Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ethan Chen
- Genetics Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Austin Wang
- Harvard University, Cambridge, Massachusetts
| | - Pal Koak
- Genetics Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Kellie Wise
- Adelaide Centre for Epigenetics (ACE), University of Adelaide, South Australia, Australia; South Australian immunoGENomics Cancer Institute (SAiGENCI), University of Adelaide, South Australia, Australia
| | - Kirk Jensen
- Adelaide Centre for Epigenetics (ACE), University of Adelaide, South Australia, Australia; South Australian immunoGENomics Cancer Institute (SAiGENCI), University of Adelaide, South Australia, Australia; Australian Genome Research Facility, Melbourne, Victoria, Australia
| | - Dana Pe'er
- Computational and Systems Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York; Howard Hughes Medical Institute, Chevy Chase, Maryland
| | - Stephanie K Dougan
- Dana-Farber Cancer Institute, Boston, Massachusetts; Department of Immunology, Harvard Medical School, Boston, Massachusetts
| | - Luciano Martelotto
- Adelaide Centre for Epigenetics (ACE), University of Adelaide, South Australia, Australia; South Australian immunoGENomics Cancer Institute (SAiGENCI), University of Adelaide, South Australia, Australia.
| | - Sahar Nissim
- Biological and Biomedical Sciences Program, Harvard Medical School, Boston, Massachusetts; Health Sciences & Technology Program, Harvard-MIT, Boston, Massachusetts; Genetics Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Dana-Farber Cancer Institute, Boston, Massachusetts; Gastroenterology Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
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Sun H, Qu H, Duan K, Du W. scMGCN: A Multi-View Graph Convolutional Network for Cell Type Identification in scRNA-seq Data. Int J Mol Sci 2024; 25:2234. [PMID: 38396909 PMCID: PMC10889820 DOI: 10.3390/ijms25042234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024] Open
Abstract
Single-cell RNA sequencing (scRNA-seq) data reveal the complexity and diversity of cellular ecosystems and molecular interactions in various biomedical research. Hence, identifying cell types from large-scale scRNA-seq data using existing annotations is challenging and requires stable and interpretable methods. However, the current cell type identification methods have limited performance, mainly due to the intrinsic heterogeneity among cell populations and extrinsic differences between datasets. Here, we present a robust graph artificial intelligence model, a multi-view graph convolutional network model (scMGCN) that integrates multiple graph structures from raw scRNA-seq data and applies graph convolutional networks with attention mechanisms to learn cell embeddings and predict cell labels. We evaluate our model on single-dataset, cross-species, and cross-platform experiments and compare it with other state-of-the-art methods. Our results show that scMGCN outperforms the other methods regarding stability, accuracy, and robustness to batch effects. Our main contributions are as follows: Firstly, we introduce multi-view learning and multiple graph construction methods to capture comprehensive cellular information from scRNA-seq data. Secondly, we construct a scMGCN that combines graph convolutional networks with attention mechanisms to extract shared, high-order information from cells. Finally, we demonstrate the effectiveness and superiority of the scMGCN on various datasets.
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Affiliation(s)
| | | | | | - Wei Du
- Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, College of Computer Science and Technology, Jilin University, Changchun 130012, China; (H.S.); (H.Q.); (K.D.)
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Benitz S, Steep A, Nasser M, Preall J, Mahajan UM, McQuithey H, Loveless I, Davis ET, Wen HJ, Long DW, Metzler T, Zwernik S, Louw M, Rempinski D, Salas-Escabillas D, Brender S, Song L, Huang L, Zhang Z, Steele NG, Regel I, Bednar F, Crawford HC. ROR2 regulates cellular plasticity in pancreatic neoplasia and adenocarcinoma. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.13.571566. [PMID: 38168289 PMCID: PMC10760092 DOI: 10.1101/2023.12.13.571566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Cellular plasticity is a hallmark of pancreatic ductal adenocarcinoma (PDAC) starting from the conversion of normal cells into precancerous lesions to the progression of carcinoma subtypes associated with aggressiveness and therapeutic response. We discovered that normal acinar cell differentiation, maintained by the transcription factor Pdx1, suppresses a broad gastric cell identity that is maintained in metaplasia, neoplasia, and the classical subtype of PDAC in mouse and human. We have identified the receptor tyrosine kinase Ror2 as marker of a gastric metaplasia (SPEM)-like identity in the pancreas. Ablation of Ror2 in a mouse model of pancreatic tumorigenesis promoted a switch to a gastric pit cell identity that largely persisted through progression to the classical subtype of PDAC. In both human and mouse pancreatic cancer, ROR2 activity continued to antagonize the gastric pit cell identity, strongly promoting an epithelial to mesenchymal transition, conferring resistance to KRAS inhibition, and vulnerability to AKT inhibition.
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Affiliation(s)
- Simone Benitz
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Alec Steep
- Center of Translational Data Science, University of Chicago, Chicago, Illinois, USA
| | - Malak Nasser
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Jonathan Preall
- Cold Spring Harbor Laboratory Cancer Center, Cold Spring Harbor, New York, USA
| | - Ujjwal M Mahajan
- Department of Medicine II, University Hospital, LMU Munich, Munich, Germany
| | - Holly McQuithey
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Ian Loveless
- Department of Public Health Sciences, Henry Ford Health System, Detroit, Michigan, USA
| | - Erick T Davis
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Hui-Ju Wen
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Daniel W Long
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Thomas Metzler
- Comparative Experimental Pathology (CEP), Institute of Pathology, School of Medicine and Health, Technical University of Munich, Munich, Germany
| | - Samuel Zwernik
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Michaela Louw
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Donald Rempinski
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | | | - Sydney Brender
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Linghao Song
- Center of Translational Data Science, University of Chicago, Chicago, Illinois, USA
| | - Ling Huang
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
| | - Zhenyu Zhang
- Center of Translational Data Science, University of Chicago, Chicago, Illinois, USA
| | - Nina G Steele
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
- Department of Pathology, Wayne State University, Detroit, Michigan, USA
- Department of Pharmacology and Toxicology, Michigan State University, Lansing, Michigan, USA
- Department of Oncology, Wayne State University, Detroit, Michigan, USA
| | - Ivonne Regel
- Department of Medicine II, University Hospital, LMU Munich, Munich, Germany
| | - Filip Bednar
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Howard C Crawford
- Department of Surgery, Henry Ford Health System, Detroit, Michigan, USA
- Department of Pharmacology and Toxicology, Michigan State University, Lansing, Michigan, USA
- Department of Oncology, Wayne State University, Detroit, Michigan, USA
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Tinklepaugh J, Mamrak NE. Imaging in Type 1 Diabetes, Current Perspectives and Directions. Mol Imaging Biol 2023; 25:1142-1149. [PMID: 37934378 DOI: 10.1007/s11307-023-01873-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/12/2023] [Accepted: 10/30/2023] [Indexed: 11/08/2023]
Abstract
Type 1 diabetes (T1D) is characterized by the autoimmune-mediated attack of insulin-producing beta cells in the pancreas, leading to reliance on exogenous insulin to control a patient's blood glucose levels. As progress is being made in understanding the pathophysiology of the disease and how to better develop therapies to treat it, there is an increasing need for monitoring technologies to quantify beta cell mass and function throughout T1D progression and beta cell replacement therapy. Molecular imaging techniques offer a possible solution through both radiologic and non-radiologic means including positron emission tomography, magnetic resonance imaging, electron paramagnetic resonance imaging, and spatial omics. This commentary piece outlines the role of molecular imaging in T1D research and highlights the need for further applications of such methodologies in T1D.
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Affiliation(s)
- Jay Tinklepaugh
- Research Department, JDRF, 200 Vesey Street, New York, NY, USA
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Sharma D, Wessel CR, Mahdavinia M, Preuss F, Bishehsari F. Reorganization of pancreas circadian transcriptome with aging. Aging (Albany NY) 2023; 15:7909-7921. [PMID: 37647013 PMCID: PMC10497008 DOI: 10.18632/aging.204929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/11/2023] [Indexed: 09/01/2023]
Abstract
The evolutionarily conserved circadian system allows organisms to synchronize internal processes with 24-h cycling environmental timing cues, ensuring optimal adaptation. Like other organs, the pancreas function is under circadian control. Recent evidence suggests that aging by itself is associated with altered circadian homeostasis in different tissues which could affect the organ's resiliency to aging-related pathologies. Pancreas pathologies of either endocrine or exocrine components are age-related. Whether pancreas circadian transcriptome output is affected by age is still unknown. To address this, here we profiled the impact of age on the pancreatic transcriptome over a full circadian cycle and elucidated a circadian transcriptome reorganization of pancreas by aging. Our study highlights gain of rhythms in the extrinsic cellular pathways in the aged pancreas and extends a potential role to fibroblast-associated mechanisms.
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Affiliation(s)
- Deepak Sharma
- Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL 60612, USA
| | - Caitlin R. Wessel
- Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL 60612, USA
| | - Mahboobeh Mahdavinia
- Division of Allergy and Immunology, Department of Internal Medicine, Rush University Medical Center, Chicago, IL 60612, USA
| | - Fabian Preuss
- University of Wisconsin-Parkside, Department: Biological Sciences, Kenosha, WI 53144, USA
| | - Faraz Bishehsari
- Rush Center for Integrated Microbiome and Chronobiology Research, Rush University Medical Center, Chicago, IL 60612, USA
- Department of Internal Medicine, Division of Gastroenterology, Rush University Medical Center, Chicago, IL 60612, USA
- Department of Anatomy and Cell Biology, Rush University Medical Center, Chicago, IL 60612, USA
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