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Deterministic scRNA-seq captures variation in intestinal crypt and organoid composition. Nat Methods 2022; 19:323-330. [DOI: 10.1038/s41592-021-01391-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 12/22/2021] [Indexed: 12/20/2022]
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2
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Rauth S, Karmakar S, Batra SK, Ponnusamy MP. Recent advances in organoid development and applications in disease modeling. Biochim Biophys Acta Rev Cancer 2021; 1875:188527. [PMID: 33640383 DOI: 10.1016/j.bbcan.2021.188527] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 12/15/2022]
Abstract
An improved understanding of stem cell niches, organogenesis, and disease models has paved the way for developing a three-dimensional (3D) organoid culture system. Organoid cultures can be derived from primary tissues (single cells or tissue subunits), adult stem cells (ASCs), induced pluripotent stem cells (iPSCs), or embryonic stem cells (ESCs). As a significant technological breakthrough, 3D organoid models offer a promising approach for understanding the complexities of human diseases ranging from the mechanistic investigation of disease pathogenesis to therapy. Here, we discuss the recent applications, advantages, and limitations of organoids as in vitro models for studying metabolomics, drug development, infectious diseases, and the gut microbiome. We further discuss the use of organoids in cancer modeling using high throughput sequencing approaches.
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Affiliation(s)
- Sanchita Rauth
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA
| | - Saswati Karmakar
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA
| | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA; Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA.
| | - Moorthy P Ponnusamy
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA; Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA.
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3
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Li W, Zimmerman SE, Peregrina K, Houston M, Mayoral J, Zhang J, Maqbool S, Zhang Z, Cai Y, Ye K, Augenlicht LH. The nutritional environment determines which and how intestinal stem cells contribute to homeostasis and tumorigenesis. Carcinogenesis 2020; 40:937-946. [PMID: 31169292 DOI: 10.1093/carcin/bgz106] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 05/28/2019] [Accepted: 06/04/2019] [Indexed: 02/07/2023] Open
Abstract
Sporadic colon cancer accounts for approximately 80% of colorectal cancer (CRC) with high incidence in Western societies strongly linked to long-term dietary patterns. A unique mouse model for sporadic CRC results from feeding a purified rodent Western-style diet (NWD1) recapitulating intake for the mouse of common nutrient risk factors each at its level consumed in higher risk Western populations. This causes sporadic large and small intestinal tumors in wild-type mice at an incidence and frequency similar to that in humans. NWD1 perturbs intestinal cell maturation and Wnt signaling throughout villi and colonic crypts and decreases mouse Lgr5hi intestinal stem cell contribution to homeostasis and tumor development. Here we establish that NWD1 transcriptionally reprograms Lgr5hi cells, and that nutrients are interactive in reprogramming. Furthermore, the DNA mismatch repair pathway is elevated in Lgr5hi cells by lower vitamin D3 and/or calcium in NWD1, paralleled by reduced accumulation of relevant somatic mutations detected by single-cell exome sequencing. In compensation, NWD1 also reprograms Bmi1+ cells to function and persist as stem-like cells in mucosal homeostasis and tumor development. The data establish the key role of the nutrient environment in defining the contribution of two different stem cell populations to both mucosal homeostasis and tumorigenesis. This raises important questions regarding impact of variable human diets on which and how stem cell populations function in the human mucosa and give rise to tumors. Moreover, major differences reported in turnover of human and mouse crypt base stem cells may be linked to their very different nutrient exposures.
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Affiliation(s)
- Wenge Li
- Department of Medicine, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Samuel E Zimmerman
- Systems and Computational Biology, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Karina Peregrina
- Department of Medicine, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Michele Houston
- Department of Medicine, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Joshua Mayoral
- Pathology, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Jinghang Zhang
- Microbiology and Immunology, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Shahina Maqbool
- Genetics, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Zhengdong Zhang
- Genetics, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Ying Cai
- Genetics, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Kenny Ye
- Epidemiology and Population Health, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
| | - Leonard H Augenlicht
- Department of Medicine, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA.,Cell Biology, Albert Einstein College of Medicine, Ullmann, Bronx, NY, USA
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4
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Okkelman IA, Neto N, Papkovsky DB, Monaghan MG, Dmitriev RI. A deeper understanding of intestinal organoid metabolism revealed by combining fluorescence lifetime imaging microscopy (FLIM) and extracellular flux analyses. Redox Biol 2020; 30:101420. [PMID: 31935648 PMCID: PMC6957829 DOI: 10.1016/j.redox.2019.101420] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/13/2019] [Accepted: 12/29/2019] [Indexed: 12/21/2022] Open
Abstract
Stem cells and the niche in which they reside feature a complex microenvironment with tightly regulated homeostasis, cell-cell interactions and dynamic regulation of metabolism. A significant number of organoid models has been described over the last decade, yet few methodologies can enable single cell level resolution analysis of the stem cell niche metabolic demands, in real-time and without perturbing integrity. Here, we studied the redox metabolism of Lgr5-GFP intestinal organoids by two emerging microscopy approaches based on luminescence lifetime measurement - fluorescence-based FLIM for NAD(P)H, and phosphorescence-based PLIM for real-time oxygenation. We found that exposure of stem (Lgr5-GFP) and differentiated (no GFP) cells to high and low glucose concentrations resulted in measurable shifts in oxygenation and redox status. NAD(P)H-FLIM and O2-PLIM both indicated that at high 'basal' glucose conditions, Lgr5-GFP cells had lower activity of oxidative phosphorylation when compared with cells lacking Lgr5. However, when exposed to low (0.5 mM) glucose, stem cells utilized oxidative metabolism more dynamically than non-stem cells. The high heterogeneity of complex 3D architecture and energy production pathways of Lgr5-GFP organoids were also confirmed by the extracellular flux (XF) analysis. Our data reveals that combined analysis of NAD(P)H-FLIM and organoid oxygenation by PLIM represents promising approach for studying stem cell niche metabolism in a live readout.
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Affiliation(s)
- Irina A Okkelman
- Laboratory of Biophysics and Bioanalysis, ABCRF, University College Cork, Cavanagh Pharmacy Building, College Road, Cork, T12 K8AF, Ireland
| | - Nuno Neto
- Department of Mechanical and Manufacturing Engineering, Trinity College Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity College Dublin, Ireland
| | - Dmitri B Papkovsky
- Laboratory of Biophysics and Bioanalysis, ABCRF, University College Cork, Cavanagh Pharmacy Building, College Road, Cork, T12 K8AF, Ireland
| | - Michael G Monaghan
- Department of Mechanical and Manufacturing Engineering, Trinity College Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity College Dublin, Ireland; Advanced Materials and BioEngineering Research (AMBER) Centre at Trinity College Dublin and Royal College of Surgeons in Ireland, Dublin, Ireland.
| | - Ruslan I Dmitriev
- Laboratory of Biophysics and Bioanalysis, ABCRF, University College Cork, Cavanagh Pharmacy Building, College Road, Cork, T12 K8AF, Ireland; Institute for Regenerative Medicine, I.M. Sechenov First Moscow State University, Moscow, Russian Federation.
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5
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3D multicellular models to study the regulation and roles of acid-base transporters in breast cancer. Biochem Soc Trans 2019; 47:1689-1700. [PMID: 31803922 DOI: 10.1042/bst20190131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/01/2019] [Accepted: 11/12/2019] [Indexed: 12/24/2022]
Abstract
As a result of elevated metabolic rates and net acid extrusion in the rapidly proliferating cancer cells, solid tumours are characterized by a highly acidic microenvironment, while cancer cell intracellular pH is normal or even alkaline. Two-dimensional (2D) cell monocultures, which have been used extensively in breast cancer research for decades, cannot precisely recapitulate the rich environment and complex processes occurring in tumours in vivo. The use of such models can consequently be misleading or non-predictive for clinical applications. Models mimicking the tumour microenvironment are particularly pivotal for studying tumour pH homeostasis, which is profoundly affected by the diffusion-limited conditions in the tumour. To advance the understanding of the mechanisms and consequences of dysregulated acid-base homeostasis in breast cancer, clinically relevant models that incorporate the unique microenvironment of these tumours are required. The development of three-dimensional (3D) cell cultures has provided new tools for basic research and pre-clinical approaches, allowing the culture of breast cancer cells under conditions that closely resemble tumour growth in a living organism. Here we provide an overview of the main 3D techniques relevant for breast cancer cell culture. We discuss the advantages and limitations of the classical 3D models as well as recent advances in 3D culture techniques, focusing on how these culture methods have been used to study acid-base transport in breast cancer. Finally, we outline future directions of 3D culture technology and their relevance for studies of acid-base transport.
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Li D, Rodia CN, Johnson ZK, Bae M, Muter A, Heussinger AE, Tambini N, Longo AM, Dong H, Lee JY, Kohan AB. Intestinal basolateral lipid substrate transport is linked to chylomicron secretion and is regulated by apoC-III. J Lipid Res 2019; 60:1503-1515. [PMID: 31152000 PMCID: PMC6718441 DOI: 10.1194/jlr.m092460] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 05/31/2019] [Indexed: 01/26/2023] Open
Abstract
Chylomicron metabolism is critical for determining plasma levels of triacylglycerols (TAGs) and cholesterol, both of which are risk factors for CVD. The rates of chylomicron secretion and remnant clearance are controlled by intracellular and extracellular factors, including apoC-III. We have previously shown that human apoC-III overexpression in mice (apoC-IIITg mice) decreases the rate of chylomicron secretion into lymph, as well as the TAG composition in chylomicrons. We now find that this decrease in chylomicron secretion is not due to the intracellular effects of apoC-III, but instead that primary murine enteroids are capable of taking up TAG from TAG-rich lipoproteins (TRLs) on their basolateral surface; and via Seahorse analyses, we find that mitochondrial respiration is induced by basolateral TRLs. Furthermore, TAG uptake into the enterocyte is inhibited when excess apoC-III is present on TRLs. In vivo, we find that dietary TAG is diverted from the cytosolic lipid droplets and driven toward mitochondrial FA oxidation when plasma apoC-III is high (or when basolateral substrates are absent). We propose that this pathway of basolateral lipid substrate transport (BLST) plays a physiologically relevant role in the maintenance of dietary lipid absorption and chylomicron secretion. Further, when apoC-III is in excess, it inhibits BLST and chylomicron secretion.
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Affiliation(s)
- Diana Li
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Cayla N Rodia
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Zania K Johnson
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Minkyung Bae
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Angelika Muter
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Amy E Heussinger
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Nicholas Tambini
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Austin M Longo
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Hongli Dong
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Ji-Young Lee
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT
| | - Alison B Kohan
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT.
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7
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Kim GA, Ginga NJ, Takayama S. Integration of Sensors in Gastrointestinal Organoid Culture for Biological Analysis. Cell Mol Gastroenterol Hepatol 2018; 6:123-131.e1. [PMID: 29928682 PMCID: PMC6007820 DOI: 10.1016/j.jcmgh.2018.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 03/19/2018] [Indexed: 12/11/2022]
Abstract
The gastrointestinal (GI) tract regulates physiologic responses in complex ways beyond facilitating nutrient entry into the circulatory system. Because of the anatomic location of the GI tract, studying in vivo physiology of the human gut, including host cell interaction with the microbiota, is limited. GI organoids derived from human stem cells are gaining interest as they recapitulate in vivo cellular phenotypes and functions. An underdeveloped capability that would further enhance the utility of these miniature models of the GI tract is to use sensors to quantitatively characterize the organoid systems with high spatiotemporal resolution. In this review, we first discuss tools to capture changes in the fluid milieu of organoid cultures both in the organoid exterior as well as the luminal side of the organoids. The subsequent section describes approaches to characterize barrier functions across the epithelial layer of the GI organoids directly or after transferring the epithelial cells to a 2-dimensional culture format in Transwells or compartmentalized microchannel devices. The final section introduces recently developed bioengineered bacterial sensors that sense intestinal inflammation-related small molecules in the lumen using lambda cI/Cro genetic elements or fluorescence as readouts. Considering the small size and cystic shape of GI organoids, sensors used in conventional macroscopic intestinal models are often not suitable, particularly for time-lapse monitoring. Unmet needs for GI organoid analysis provides many opportunities for the development of noninvasive and miniaturized biosensors.
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Key Words
- 2D, 2-dimensional
- 3D, 3-dimensional
- Bioengineered Sensor
- FITC, fluorescein isothiocyanate
- FITC-Dex, fluorescein isothiocyanate-dextran
- GI Organoids
- GI, gastrointestinal
- HIO, human intestinal organoid
- NO, nitric oxide
- Organoid Microenvironment
- RT-PCR, reverse-transcription polymerase chain reaction
- SNARF, seminaphtharhodafluor
- TCRS, 2-component regulatory system
- TEER, transepithelial/transendothelial electric resistance
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Affiliation(s)
- Ge-Ah Kim
- Department of Materials Science and Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, Georgia
| | - Nicholas J. Ginga
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, Georgia
| | - Shuichi Takayama
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, Georgia
- Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan
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8
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Liu F, Huang J, Ning B, Liu Z, Chen S, Zhao W. Drug Discovery via Human-Derived Stem Cell Organoids. Front Pharmacol 2016; 7:334. [PMID: 27713700 PMCID: PMC5032635 DOI: 10.3389/fphar.2016.00334] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 09/09/2016] [Indexed: 12/18/2022] Open
Abstract
Patient-derived cell lines and animal models have proven invaluable for the understanding of human intestinal diseases and for drug development although both inherently comprise disadvantages and caveats. Many genetically determined intestinal diseases occur in specific tissue microenvironments that are not adequately modeled by monolayer cell culture. Likewise, animal models incompletely recapitulate the complex pathologies of intestinal diseases of humans and fall short in predicting the effects of candidate drugs. Patient-derived stem cell organoids are new and effective models for the development of novel targeted therapies. With the use of intestinal organoids from patients with inherited diseases, the potency and toxicity of drug candidates can be evaluated better. Moreover, owing to the novel clustered regularly interspaced short palindromic repeats/CRISPR-associated protein-9 genome-editing technologies, researchers can use organoids to precisely modulate human genetic status and identify pathogenesis-related genes of intestinal diseases. Therefore, here we discuss how patient-derived organoids should be grown and how advanced genome-editing tools may be applied to research on modeling of cancer and infectious diseases. We also highlight practical applications of organoids ranging from basic studies to drug screening and precision medicine.
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Affiliation(s)
- Fangkun Liu
- Department of Neurosurgery, Xiangya Hospital, Central South UniversityChangsha, China; Center for Inflammation and Epigenetics, Houston Methodist Research Institute, HoustonTX, USA
| | - Jing Huang
- Center for Inflammation and Epigenetics, Houston Methodist Research Institute, HoustonTX, USA; Department of Psychiatry, The Second Xiangya Hospital, Central South University, ChangshaHunan, China; Mental Health Institute of the Second Xiangya Hospital, Central South University, ChangshaHunan, China; Chinese National Clinical Research Center on Mental Disorders, ChangshaHunan, China; Chinese National Technology Institute on Mental Disorders, ChangshaHunan, China; Hunan Key Laboratory of Psychiatry and Mental Health, ChangshaHunan, China
| | - Bo Ning
- Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston TX, USA
| | - Zhixiong Liu
- Department of Neurosurgery, Xiangya Hospital, Central South University Changsha, China
| | - Shen Chen
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen UniversityGuangzhou, China; Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen UniversityGuangzhou, China
| | - Wei Zhao
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen UniversityGuangzhou, China; Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen UniversityGuangzhou, China
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9
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Richmond CA, Shah MS, Carlone DL, Breault DT. An enduring role for quiescent stem cells. Dev Dyn 2016; 245:718-26. [PMID: 27153394 DOI: 10.1002/dvdy.24416] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/22/2016] [Accepted: 04/30/2016] [Indexed: 12/12/2022] Open
Abstract
The intestine's ability to recover from catastrophic injury requires quiescent intestinal stem cells (q-ISCs). While rapidly cycling (Lgr5+) crypt base columnar (CBC) ISCs normally maintain the intestine, they are highly sensitive to pathological injuries (irradiation, inflammation) and must be restored by q-ISCs to sustain intestinal homeostasis. Despite clear relevance to human health, virtually nothing is known regarding the factors that regulate q-ISCs. A comprehensive understanding of these mechanisms would likely lead to targeted new therapies with profound therapeutic implications for patients with gastrointestinal conditions. We briefly review the current state of the literature, highlighting homeostatic mechanisms important for q-ISC regulation, listing key questions in the field, and offer strategies to address them. Developmental Dynamics 245:718-726, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Camilla A Richmond
- Division of Gastroenterology, Boston Children's Hospital, Boston, Massachusetts
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | - Manasvi S Shah
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
- Division of Endocrinology, Boston Children's Hospital, Boston, Massachusetts
| | - Diana L Carlone
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
- Division of Endocrinology, Boston Children's Hospital, Boston, Massachusetts
- Harvard Stem Cell Institute, Cambridge, Massachusetts
| | - David T Breault
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
- Division of Endocrinology, Boston Children's Hospital, Boston, Massachusetts
- Harvard Stem Cell Institute, Cambridge, Massachusetts
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Fan YY, Davidson LA, Callaway ES, Wright GA, Safe S, Chapkin RS. A bioassay to measure energy metabolism in mouse colonic crypts, organoids, and sorted stem cells. Am J Physiol Gastrointest Liver Physiol 2015; 309:G1-9. [PMID: 25977509 PMCID: PMC4491508 DOI: 10.1152/ajpgi.00052.2015] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 04/26/2015] [Indexed: 01/31/2023]
Abstract
Evidence suggests that targeting cancer cell energy metabolism might be an effective therapeutic approach for selective ablation of malignancies. Using a Seahorse Extracellular Flux Analyzer, we have demonstrated that select environmental agents can alter colonic mitochondrial function by increasing respiration-induced proton leak, thereby inducing apoptosis, a marker of colon cancer risk. To further probe bioenergetics in primary intestinal cells, we developed methodology that can be modified and adapted to measure the bioenergetic profiles of colonic crypts, the basic functional unit of the colon, and colonic organoids, an ex vivo 3D culture of colonic crypts. Furthermore, in combination with the MoFlo Astrios High-Speed Cell Sorter, we were able to measure the bioenergetic profiles of colonic adult stem and daughter cells from Lgr5-EGFP-IRES-creER(T2) transgenic mice. We examined the effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), a full arylhydrocarbon receptor agonist, known to affect gastrointestinal function and cancer risk, on the bioenergetic profiles of intestinal epithelial cells. Mouse colonic crypts, organoids, or sorted single cells were seeded onto Matrigel-precoated Seahorse XF24 microplates for extracellular flux analysis. Temporal analyses revealed distinct energy metabolic profiles in crypts and organoids challenged with TCDD. Furthermore, sorted Lgr5(+) stem cells exhibited a Warburg-like metabolic profile. This is noteworthy because perturbations in stem cell dynamics are generally believed to represent the earliest step toward colon tumorigenesis. We propose that our innovative methodology may facilitate future in vivo/ex vivo metabolic studies using environmental agents affecting colonocyte energy metabolism.
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Affiliation(s)
- Yang-Yi Fan
- 1Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, Texas; ,3Department of Nutrition and Food Science, Texas A&M University, College Station, Texas;
| | - Laurie A. Davidson
- 1Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, Texas; ,2Center for Translational Environmental Health Research, Texas A&M University, College Station, Texas; ,3Department of Nutrition and Food Science, Texas A&M University, College Station, Texas;
| | - Evelyn S. Callaway
- 1Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, Texas; ,3Department of Nutrition and Food Science, Texas A&M University, College Station, Texas;
| | - Gus A. Wright
- 4Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas;
| | - Stephen Safe
- 2Center for Translational Environmental Health Research, Texas A&M University, College Station, Texas; ,5Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, Texas; and ,6Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas
| | - Robert S. Chapkin
- 1Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, Texas; ,2Center for Translational Environmental Health Research, Texas A&M University, College Station, Texas; ,3Department of Nutrition and Food Science, Texas A&M University, College Station, Texas; ,6Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas
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