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Ilomäki MA, Polari L, Stenvall CGA, Tayyab M, Kähärä K, Ridge KM, Toivola DM. Defining a timeline of colon pathologies after keratin 8 loss: rapid crypt elongation and diarrhea are followed by epithelial erosion and cell exfoliation. Am J Physiol Gastrointest Liver Physiol 2024; 326:G67-G77. [PMID: 37962942 DOI: 10.1152/ajpgi.00140.2023] [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: 07/07/2023] [Revised: 10/27/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023]
Abstract
Keratins are epithelial intermediate filament proteins that play a crucial role in cellular stress protection, with K8 being the most abundant in the colon. The intestinal epithelial-specific K8-deficient mouse model (K8flox/flox;Villin-Cre) exhibits characteristics of inflammatory bowel disease, including diarrhea, crypt erosion, hyperproliferation, and decreased barrier function. Nevertheless, the order in which these events occur and whether they are a direct cause of K8 loss or a consequence of one event inducing another remains unexplored. Increased knowledge about early events in the disruption of colon epithelial integrity would help to understand the early pathology of inflammatory and functional colon disorders and develop preclinical models and diagnostics of colonic diseases. Here, we aimed to characterize the order of physiological events after Krt8 loss by utilizing K8flox/flox;Villin-CreERt2 mice with tamoxifen-inducible Krt8 deletion in intestinal epithelial cells, and assess stool analysis as a noninvasive method to monitor real-time gene expression changes following Krt8 loss. K8 protein was significantly decreased within a day after induction, followed by its binding partners, K18 and K19 from day 4 onward. The sequential colonic K8 downregulation in adult mice leads to immediate diarrhea and crypt elongation with activation of proliferation signaling, followed by crypt loss and increased neutrophil activity within 6-8 days, highlighting impaired water balance and crypt elongation as the earliest colonic changes upon Krt8 loss. Furthermore, epithelial gene expression patterns were comparable between colon tissue and stool samples, demonstrating the feasibility of noninvasive monitoring of gut epithelia in preclinical research utilizing Cre-LoxP-based intestinal disease models.NEW & NOTEWORTHY Understanding the order in which physiological and molecular events occur helps to recognize the onset of diseases and improve their preclinical models. We utilized Cre-Lox-based inducible keratin 8 deletion in mouse intestinal epithelium to characterize the earliest events after keratin 8 loss leading to colitis. These include diarrhea and crypt elongation, followed by erosion and neutrophil activity. Our results also support noninvasive methodology for monitoring colon diseases in preclinical models.
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Affiliation(s)
- Maria A Ilomäki
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Lauri Polari
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Carl-Gustaf A Stenvall
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Mina Tayyab
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Kirah Kähärä
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Karen M Ridge
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, United States
| | - Diana M Toivola
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
- Turku Center for Disease Modeling, University of Turku, Turku, Finland
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McConnel CS, Slanzon GS, Parrish LM, Trombetta SC, Shaw LF, Moore DA, Sischo WM. Transcriptional changes detected in fecal RNA from neonatal dairy calves of different breeds following gastrointestinal disease of varying severity. PLoS One 2022; 17:e0278664. [PMID: 36454999 PMCID: PMC9714867 DOI: 10.1371/journal.pone.0278664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 11/22/2022] [Indexed: 12/03/2022] Open
Abstract
Gastrointestinal (GI) disease is a major health concern in preweaned dairy calves. The objective of this fixed cohort study was to use RNA isolated from preweaned Holstein and Jersey heifer calf feces to study the molecular adaptations to variable clinical GI disease. The study was conducted on a commercial calf ranch in the western U.S. Enrolled calves were assessed twice daily for variations in demeanor, milk intake, and hydration. Fecal consistency scores were recorded at enrollment (day 1), and on the day (day 10) that a fecal sample was collected for differential gene expression (DGE). Calves with diarrhea on either day were classified as having either uncomplicated, localized GI disease (scours), or systemic GI disease (systemic enteritis). Eighty-four calves' fecal RNA was evaluated for DGE, of which 33 calves (n = 20 Holstein; n = 13 Jersey) were consistently healthy. The remaining 51 calves (n = 23 Holstein; n = 28 Jersey) experienced varying severity of GI disease during the sampling window. Genes of interest were related to the inflammatory response (i.e., IFNG, NFKB1, NOD2, TLR2, and TLR4) and cell membrane or cytoplasmic transport (i.e., AQP3, FABP2, KRT8 and SLC5A1). Breed-specific findings indicated that AQP3, IFNG, and TLR4 were upregulated in Holsteins with systemic enteritis, whereas KRT8 was downregulated in systemically affected Jerseys. Holsteins did not appear affected by scours aside from a tendency for DGE of toll-like receptors (TLRs) on the day of diarrhea. However, Jersey calves consistently demonstrated a tendency to upregulate IFNG, NFKB1, and TLR4 when affected with either scours or systemic enteritis. These findings were more pronounced in systemically affected Jersey calves and were observed as a delayed response to both scours and systemic enteritis. These findings support previous observations suggesting that Holstein calves may be better equipped than Jersey calves to rapidly fight pathogen invasion.
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Affiliation(s)
- C. S. McConnel
- Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, Washington State University, Pullman, Washington, United States of America
- * E-mail:
| | - G. S. Slanzon
- Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, Washington State University, Pullman, Washington, United States of America
| | - L. M. Parrish
- Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, Washington State University, Pullman, Washington, United States of America
| | - S. C. Trombetta
- Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, Washington State University, Pullman, Washington, United States of America
| | - L. F. Shaw
- Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, Washington State University, Pullman, Washington, United States of America
| | - D. A. Moore
- Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, Washington State University, Pullman, Washington, United States of America
| | - W. M. Sischo
- Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, Washington State University, Pullman, Washington, United States of America
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3
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Shu T, Wu K, Guo Y, He Q, Song X, Shan J, Wu L, Liu J, Wang Z, Liu L, Sun X. Evaluation of fecal SYPL1 as a diagnostic biomarker in colorectal cancer. Clin Biochem 2022; 103:8-15. [PMID: 35218739 DOI: 10.1016/j.clinbiochem.2022.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 02/06/2022] [Accepted: 02/21/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND At present, there is still no ideal non-invasive biomarker for colorectal cancer (CRC) screening. Previously, we foundserum synaptophysin like 1 (SYPL1) served as a potential biomarker for CRC diagnosis. However, whether fecal SYPL1 (fSYPL1) are more sensitive and specific for CRC remains unclear. METHODS We analyzed fSYPL1 in controls (n = 70), adenoma patients (n = 80), CRC patients (n = 150) and postoperative CRC patients (n = 25) by ELISA. RESULTS SYPL1 was stable in feces. The fSYPL1 levels were significantly higher in CRC patients than in either controls or adenoma patients (P < 0.0001). ROC curves showed that fSYPL1 performed superbly in distinguishing CRC patients from controls (AUC = 0.947; 95% CI: 0.920 - 0.974, P < 0.0001, sensitivity: 80.67%, specificity: 100.00%), which showed much stronger performance than the traditional biomarkers (FOBT, CEA and CA19-9). Meanwhile, the fSYPL1 level positively correlated with tumor size, tumor invasion, lymph node invasion and clinical stage (P < 0.05). In addition, the detection rate of fSYPL1 was high in early CRC (75.00% in stage I and II). The fSYPL1 levels in CRC patients declined substantially after surgery (P = 0.0002). By means of a lower cut off level, 73.58% of high-risk adenomas were detected. The combination of fSYPL1 and FOBT performed better than the combination of plasma SYPL1, CEA and CA199 in distinguishing CRC patients from controls. CONCLUSION The fSYPL1 might be a potential biomarker for CRC screening, early diagnosis, prognosis prediction and therapeutic effect monitoring.
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Affiliation(s)
- Tao Shu
- Department of Gastroenterology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Kaiwen Wu
- School of Medicine, Southwest Jiaotong University, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Yuanbiao Guo
- Medical Research Center, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, The Second Chengdu Affiliated Hospital of Chongqing Medical University, Chengdu, Sichuan 610031, China
| | - Qiao He
- Department of Clinical Laboratory, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610031, China
| | - Xiaoyu Song
- Department of Clinical Laboratory, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610031, China
| | - Jing Shan
- Department of Gastroenterology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, The Second Chengdu Affiliated Hospital of Chongqing Medical University, Chengdu, Sichuan 610031, China
| | - Liping Wu
- Department of Gastroenterology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, The Second Chengdu Affiliated Hospital of Chongqing Medical University, Chengdu, Sichuan 610031, China
| | - Jia Liu
- School of Medicine, Southwest Jiaotong University, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Zhiming Wang
- School of Medicine, Southwest Jiaotong University, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Lei Liu
- Medical Research Center, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, The Second Chengdu Affiliated Hospital of Chongqing Medical University, Chengdu, Sichuan 610031, China.
| | - Xiaobin Sun
- Department of Gastroenterology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China; Department of Gastroenterology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, The Second Chengdu Affiliated Hospital of Chongqing Medical University, Chengdu, Sichuan 610031, China.
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Ryan L, Wong Y, Dwyer KM, Clarke D, Kyprian L, Craig JM. Coprocytobiology: A Technical Review of Cytological Colorectal Cancer Screening in Fecal Samples. SLAS Technol 2021; 26:591-604. [PMID: 34219541 DOI: 10.1177/24726303211024562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
GRAPHICAL ABSTRACT
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Affiliation(s)
- Liam Ryan
- Deakin University, Waurn Ponds, Victoria, Australia
| | - YenTing Wong
- Deakin University, Waurn Ponds, Victoria, Australia
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Chaudhry R, Bamola VD, Samanta P, Dubey D, Bahadur T, Chandan M, Tiwary S, Gahlowt A, Nair N, Kaur H, Passi C, Sharma A, Chandel DS, Panigrahi P. Immunoglobulin Receptors Expression in Indian Colon Cancer Patients and Healthy Subjects Using a Noninvasive Approach and Flowcytometry. Int J Appl Basic Med Res 2020; 10:194-199. [PMID: 33088743 PMCID: PMC7534722 DOI: 10.4103/ijabmr.ijabmr_191_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/14/2019] [Accepted: 02/13/2020] [Indexed: 11/19/2022] Open
Abstract
Background: Isolation of viable colonocytes from human stool is a noninvasive and convenient approach that can be used for diagnostic, screening, management, and research on various gastrointestinal (GI) diseases including colon cancer. Limited studies are available globally and for the first time in this article, we have reported the immunoglobulin (Ig) (IgA and IgG) receptors concentration on viable colonocytes for Indian colon cancer patients using this noninvasive approach. Materials and Methods: Viable colonocytes from stool were isolated by the Somatic Cell Sampling and Recovery method (Noninvasive Technology, USA) and processed for the assessment of Igs (IgA and IgG) receptors expression using standard immunophenotyping and flow cytometry. Results: IgA and IgG receptor expression was measured and reported on these viable colonocytes. There was a significant difference in the expression of IgA and IgG receptors on viable colonocytes between colon cancer patients and healthy individuals. Conclusion: This noninvasive technique is a promising approach for the detection of molecular and immunological markers that will help clinicians in the diagnosis, screening, monitoring, and management of different GI diseases including colon cancer.
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Affiliation(s)
- Rama Chaudhry
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Vishwa Deepak Bamola
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Projoyita Samanta
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Divya Dubey
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Tej Bahadur
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Monica Chandan
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Shyam Tiwary
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Abhipray Gahlowt
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Neha Nair
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Harneet Kaur
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Chena Passi
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
| | - Atul Sharma
- Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Dinesh S Chandel
- Department of Environmental, Agricultural and Occupational Health, Center for Global Health and Development, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Pinaki Panigrahi
- Department of Epidemiology, Center for Global Health and Development, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska, USA.,Department of Pediatrics, Center for Global Health and Development, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
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6
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Albaugh GP, Dutta SK, Iyengar V, Shami S, Lohani A, Sainz E, Kessie G, Nair P, Lagerholm S, Kamra A, Chen JHJ, Kalavapudi S, Vinayek R, Shores R, Phillips LE, Nair R, Nair PP. Identification of a Native Novel Oncolytic Immunoglobulin on Exfoliated Colon Epithelial Cells: A Bispecific Heterodimeric Chimera of IgA/IgG*. ACTA ACUST UNITED AC 2020. [DOI: 10.4236/ojpm.2020.106010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Sharma AK, Pafčo B, Vlčková K, Červená B, Kreisinger J, Davison S, Beeri K, Fuh T, Leigh SR, Burns MB, Blekhman R, Petrželková KJ, Gomez A. Mapping gastrointestinal gene expression patterns in wild primates and humans via fecal RNA-seq. BMC Genomics 2019; 20:493. [PMID: 31200636 PMCID: PMC6567582 DOI: 10.1186/s12864-019-5813-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 05/20/2019] [Indexed: 12/30/2022] Open
Abstract
Background Limited accessibility to intestinal epithelial tissue in wild animals and humans makes it challenging to study patterns of intestinal gene regulation, and hence to monitor physiological status and health in field conditions. To explore solutions to this limitation, we have used a noninvasive approach via fecal RNA-seq, for the quantification of gene expression markers in gastrointestinal cells of free-range primates and a forager human population. Thus, a combination of poly(A) mRNA enrichment and rRNA depletion methods was used in tandem with RNA-seq to quantify and compare gastrointestinal gene expression patterns in fecal samples of wild Gorilla gorilla gorilla (n = 9) and BaAka hunter-gatherers (n = 10) from The Dzanga Sangha Protected Areas, Central African Republic. Results Although only a small fraction (< 4.9%) of intestinal mRNA signals was recovered, the data was sufficient to detect significant functional differences between gorillas and humans, at the gene and pathway levels. These intestinal gene expression differences were specifically associated with metabolic and immune functions. Additionally, non-host RNA-seq reads were used to gain preliminary insights on the subjects’ dietary habits, intestinal microbiomes, and infection prevalence, via identification of fungi, nematode, arthropod and plant RNA. Conclusions Overall, the results suggest that fecal RNA-seq, targeting gastrointestinal epithelial cells can be used to evaluate primate intestinal physiology and gut gene regulation, in samples obtained in challenging conditions in situ. The approach used herein may be useful to obtain information on primate intestinal health, while revealing preliminary insights into foraging ecology, microbiome, and diet. Electronic supplementary material The online version of this article (10.1186/s12864-019-5813-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Barbora Pafčo
- The Czech Academy of Sciences, Institute of Vertebrate Biology, Květná 8, 603 65, Brno, Czech Republic.,Department of Pathology and Parasitology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Palackého tř. 1946/1, 612 42, Brno, Czech Republic
| | - Klára Vlčková
- The Czech Academy of Sciences, Institute of Vertebrate Biology, Květná 8, 603 65, Brno, Czech Republic.,Department of Pathology and Parasitology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Palackého tř. 1946/1, 612 42, Brno, Czech Republic
| | - Barbora Červená
- The Czech Academy of Sciences, Institute of Vertebrate Biology, Květná 8, 603 65, Brno, Czech Republic.,Department of Pathology and Parasitology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Palackého tř. 1946/1, 612 42, Brno, Czech Republic
| | - Jakub Kreisinger
- The Czech Academy of Sciences, Institute of Vertebrate Biology, Květná 8, 603 65, Brno, Czech Republic.,Department of Zoology, Faculty of Science, Charles University, Viničná 7, 128 44, Praha, Czech Republic
| | - Samuel Davison
- Department of Animal Science, University of Minnesota, Twin Cities, USA
| | - Karen Beeri
- Vanderbilt University medical center Technologies for Advanced Genomics, Vanderbilt University medical center, Nashville, TN, USA
| | - Terence Fuh
- WWF Central African Republic, Bangui, Central African Republic
| | - Steven R Leigh
- Department of Anthropology, University of Colorado, Boulder, CO, USA
| | - Michael B Burns
- Loyola University Chicago, Quinlan Life Sciences Building, Chicago, IL, USA
| | - Ran Blekhman
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Twin Cities, MN, USA.,Department of Ecology, Evolution and Behavior, University of Minnesota, Twin Cities, MN, USA
| | - Klára J Petrželková
- The Czech Academy of Sciences, Institute of Vertebrate Biology, Květná 8, 603 65, Brno, Czech Republic. .,The Czech Academy of Sciences, Biology Centre, Institute of Parasitology, Branišovská 31, 370 05, České Budějovice, Czech Republic. .,Liberec Zoo, Lidové sady 425/1, 460 01, Liberec, Czech Republic.
| | - Andres Gomez
- Department of Animal Science, University of Minnesota, Twin Cities, USA.
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AlQallaf H, Hamada Y, Blanchard S, Shin D, Gregory R, Srinivasan M. Differential profiles of soluble and cellular toll like receptor (TLR)-2 and 4 in chronic periodontitis. PLoS One 2018; 13:e0200231. [PMID: 30571680 PMCID: PMC6301611 DOI: 10.1371/journal.pone.0200231] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 11/05/2018] [Indexed: 01/19/2023] Open
Abstract
Chronic periodontitis is a common inflammatory disease initiated by a complex microbial biofilm and mediated by the host response causing destruction of the supporting tissues of the teeth. Host recognition of pathogens is mediated by toll-like receptors (TLRs) that bind conserved molecular patterns shared by large groups of microorganisms. The oral epithelial cells respond to most periodontopathic bacteria via TLR-2 and TLR-4. In addition to the membrane-associated receptors, soluble forms of TLR-2 (sTLR-2) and TLR-4 (sTLR-4) have been identified and are thought to play a regulatory role by binding microbial ligands. sTLR-2 has been shown to arise from ectodomain shedding of the extracellular domain of the membrane receptor and sTLR-4 is thought to be an alternate spliced form. Many studies have previously reported the presence of elevated numbers of viable exfoliated epithelial cells in the saliva of patients with chronic periodontitis. The objective of this study was to investigate the potential value of salivary sTLR-2 and sTLR-4 together with the paired epithelial cell-associated TLR-2/4 mRNA as diagnostic markers for chronic periodontitis. Unstimulated whole saliva was collected after obtaining informed consent from 40 individuals with either periodontitis or gingivitis. The sTLR-2 and sTLR4 in saliva was measured by enzyme-linked immunosorbent assay. The TLR-2 and TLR-4 transcript in the epithelial cells in saliva was measured by real time polymerase chain reaction. While levels of sTLR-2 exhibited an inverse correlation, sTLR-4 positively correlated with clinical parameters in the gingivitis cohort. Interestingly, both correlations were lost in the periodontitis cohort indicating a dysregulated host response. On the other hand, while the sTLR-2 and the paired epithelial cell associated TLR-2 mRNA exhibited a direct correlation (r2 = 0.62), that of sTLR4 and TLR-4 mRNA exhibited an inverse correlation (r2 = 0.53) in the periodontitis cohort. Collectively, assessments of salivary sTLR2 and sTLR4 together with the respective transcripts in the epithelial cells could provide clinically relevant markers of disease progression from gingivitis to periodontitis.
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Affiliation(s)
- Hawra AlQallaf
- Department of Periodontics and Allied Dental Programs, School of Dentistry, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States of America
| | - Yusuke Hamada
- Department of Periodontics and Allied Dental Programs, School of Dentistry, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States of America
| | - Steven Blanchard
- Department of Periodontics and Allied Dental Programs, School of Dentistry, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States of America
| | - Daniel Shin
- Department of Periodontics and Allied Dental Programs, School of Dentistry, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States of America
| | - Richard Gregory
- Department of Biomedical and Applied Sciences, School of Dentistry, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States of America
| | - Mythily Srinivasan
- Department of Oral Pathology, Medicine and Radiology, School of Dentistry, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States of America
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Rosa F, Busato S, Avaroma FC, Linville K, Trevisi E, Osorio JS, Bionaz M. Transcriptional changes detected in fecal RNA of neonatal dairy calves undergoing a mild diarrhea are associated with inflammatory biomarkers. PLoS One 2018; 13:e0191599. [PMID: 29373601 PMCID: PMC5786293 DOI: 10.1371/journal.pone.0191599] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 01/08/2018] [Indexed: 12/21/2022] Open
Abstract
After birth, a newborn calf has to adapt to an extrauterine life characterized by several physiological changes. In particular, maturation of the gastrointestinal tract in a new environment loaded with potential pathogens, which can predispose neonatal calves to develop diarrhea, and is a major cause of morbidity and mortality during the first 4 wks of life. We aimed to investigate the inflammatory adaptations at a transcriptomic level in the gastrointestinal (GI) tract to a mild diarrhea in neonatal dairy calves using RNA isolated from fresh fecal samples. Eight newborn Jersey male calves were used from birth to 5 wks of age and housed in individual pens. After birth, calves received 1.9 L of colostrum from their respective dams. Calves had ad-libitum access to water and starter grain (22% CP) and were fed twice daily a total of 5.6 L pasteurized whole milk. Starter intake, body weight (BW), fecal score, withers height (WH), and rectal temperature (RT) were recorded throughout the experiment. Blood samples were collected weekly for metabolic and inflammatory profiling from wk 0 to wk 5. Fresh fecal samples were collected weekly and immediately flash frozen until RNA was extracted using a Trizol-based method, and subsequently, an RT-qPCR analysis was performed. Orthogonal contrasts were used to evaluate linear or quadratic effects over time. Starter intake, BW, and WH increased over time. Fecal score was greatest (2.6 ± 0.3) during wk 2. The concentrations of IL-6, ceruloplasmin, and haptoglobin had a positive quadratic effect with maximal concentrations during wk 2, which corresponded to the maximal fecal score observed during the same time. The concentration of serum amyloid A decreased over time. The mRNA expression of the proinflammatory related genes TLR4, TNFA, IL8, and IL1B had a positive quadratic effect of time. A time effect was observed for the cell membrane sodium-dependent glucose transporter SLC5A1, for the major carbohydrate facilitated transporter SLC2A2, and water transport function AQP3, where SLC5A1 and AQP3 had a negative quadratic effect over time. Our data support the use of the fecal RNA as a noninvasive tool to investigate intestinal transcriptomic profiling of dairy calves experiencing diarrhea, which would be advantageous for future research including nutritional effects and health conditions.
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Affiliation(s)
- Fernanda Rosa
- Department of Animal and Rangeland Sciences, Oregon State University, Corvallis, Oregon, United States of America
| | - Sebastiano Busato
- Department of Animal and Rangeland Sciences, Oregon State University, Corvallis, Oregon, United States of America
| | - Fatima C. Avaroma
- Escuela Agrícola Panamericana El Zamorano, El Zamorano, Francisco Morazán, Honduras
| | - Kali Linville
- Department of Dairy and Food Sciences, South Dakota State University, Brookings, South Dakota, United States of America
| | - Erminio Trevisi
- Istituto di Zootecnica, Facoltà di Scienze Agrarie, Alimentari e Ambientali, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Johan S. Osorio
- Department of Animal and Rangeland Sciences, Oregon State University, Corvallis, Oregon, United States of America
- * E-mail:
| | - Massimo Bionaz
- Department of Animal and Rangeland Sciences, Oregon State University, Corvallis, Oregon, United States of America
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Abstract
Colorectal cancer (CRC) screening reduces CRC incidence and mortality and is widely recommended. However, despite these demonstrated benefits, a large percentage of the population remains unscreened. The multi-target stool DNA (MT-sDNA) test is a new, non-invasive option for CRC screening that has a high accuracy rate in detection of colorectal neoplasia and offers great opportunity to enhance screening uptake. This review provides the current state of the art knowledge about the use of MT-sDNA in CRC screening.
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Affiliation(s)
- Seth Sweetser
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA.
| | - David A Ahlquist
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
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Wu LX, Wen CJ, Li Y, Zhang X, Shao YY, Yang Z, Zhou HH. Interindividual epigenetic variation in ABCB1 promoter and its relationship with ABCB1 expression and function in healthy Chinese subjects. Br J Clin Pharmacol 2015; 80:1109-21. [PMID: 25940551 DOI: 10.1111/bcp.12675] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 04/25/2015] [Accepted: 04/30/2015] [Indexed: 12/15/2022] Open
Abstract
AIM Interindividual epigenetic variation is likely to be an important mechanism contributing to the interindividual variability in the expression and function of ATP-binding cassette, sub-family B, member 1 (ABCB1). The aim of the present study was to explore the effect of interindividual epigenetic variability in the ABCB1 promoter on ABCB1 expression and function in healthy Chinese subjects. METHODS Using bisulfite sequencing polymerase chain reaction (PCR) and chromatin immunoprecipitation assays, the DNA methylation and histone acetylation status of the ABCB1 promoter in stool DNA and exfoliated colonic epithelial cells of 157 healthy Chinese male volunteers was analysed. ABCB1 mRNA levels in colonic epithelial cells were detected by real-time PCR. The digoxin pharmacokinetics in subjects with different epigenetic profiles was investigated after a single oral administration of digoxin (0.5 mg). RESULTS The methylation levels of ABCB1 promoter in stool DNA showed a significant interindividual variation, from 0.84% to 18.05%. A high methylation level of the ABCB1 promoter was closely related to the low levels of acetylated histone H3 and ABCB1 mRNA expression. In the high methylation group, the area under the concentration-time curves (AUC(0-4 h) and AUC(0-10 h) ) of digoxin was increased by 19% [95% confidence interval (CI) 10%, 31%; P = 0.024] and 13% (95% CI 8%, 26%; P = 0.026), respectively, and the peak concentration (Cmax ) of digoxin was increased by 30% (95% CI 12%, 41%; P = 0.021) compared with the low methylation group. CONCLUSIONS The epigenetic modifications of the ABCB1 promoter show high interindividual variability in healthy Chinese subjects, and are closely related to the interindividual variation in ABCB1 mRNA expression and digoxin 0-4 h plasma concentrations in vivo.
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Affiliation(s)
- Lan-Xiang Wu
- Institute of life sciences, Chongqing Medical University, Chongqing, P.R. China
| | - Chun-Jie Wen
- Institute of life sciences, Chongqing Medical University, Chongqing, P.R. China
| | - Ying Li
- Institute of life sciences, Chongqing Medical University, Chongqing, P.R. China
| | - Xue Zhang
- Institute of life sciences, Chongqing Medical University, Chongqing, P.R. China
| | - Ying-Ying Shao
- Institute of life sciences, Chongqing Medical University, Chongqing, P.R. China
| | - Zhu Yang
- Institute of life sciences, Chongqing Medical University, Chongqing, P.R. China
| | - Hong-Hao Zhou
- Institute of life sciences, Chongqing Medical University, Chongqing, P.R. China.,Pharmacogenetics Research Institute, Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, P.R. China
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12
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Kapoor V, DeBry RW, Boccelli DL, Wendell D. Sequencing human mitochondrial hypervariable region II as a molecular fingerprint for environmental waters. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:10648-10655. [PMID: 25154050 DOI: 10.1021/es503189g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
To protect environmental water from human fecal contamination, authorities must be able to unambiguously identify the source of the contamination. Current identification methods focus on tracking fecal bacteria associated with the human gut, but many of these bacterial indicators also thrive in the environment and in other mammalian hosts. Mitochondrial DNA could solve this problem by serving as a human-specific marker for fecal contamination. Here we show that the human mitochondrial hypervariable region II can function as a molecular fingerprint for human contamination in an urban watershed impacted by combined sewer overflows. We present high-throughput sequencing analysis of hypervariable region II for spatial resolution of the contaminated sites and assessment of the population diversity of the impacting regions. We propose that human mitochondrial DNA from public waste streams may serve as a tool for identifying waste sources definitively, analyzing population diversity, and conducting other anthropological investigations.
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Affiliation(s)
- Vikram Kapoor
- Department of Biomedical, Chemical, and Environmental Engineering, University of Cincinnati , Cincinnati, Ohio 45221, United States
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Donovan SM, Wang M, Monaco MH, Martin CR, Davidson LA, Ivanov I, Chapkin RS. Noninvasive molecular fingerprinting of host-microbiome interactions in neonates. FEBS Lett 2014; 588:4112-9. [PMID: 25042036 DOI: 10.1016/j.febslet.2014.07.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 07/09/2014] [Accepted: 07/10/2014] [Indexed: 01/12/2023]
Abstract
The early postnatal period is a critical window for intestinal and immune maturation. Intestinal development and microbiome diversity and composition differ between breast- (BF) and formula-fed (FF) infants. Mechanistic examination into host-microbe relationships in healthy infants has been hindered by ethical constraints surrounding tissue biopsies. Thus, a statistically rigorous analytical framework to simultaneously examine both host and microbial responses to dietary/environmental factors using exfoliated intestinal epithelial cells was developed. Differential expression of ∼1200 genes, including genes regulating intestinal proliferation, differentiation and barrier function, was observed between BF and FF term infants. Canonical correlation analysis uncovered a relationship between microbiome virulence genes and host immunity and defense genes. Lastly, exfoliated cells from preterm and term infants were compared. Pathways associated with immune cell function and inflammation were up-regulated in preterm, whereas cell growth-related genes were up-regulated in the term infants. Thus, coordinate measurement of the transcriptomes of exfoliated epithelial cells and microbiome allows inquiry into mutualistic host-microbe interactions in the infant, which can be used to prospectively study gut development or, retrospectively, to identify potential triggers of disease in banked samples.
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Affiliation(s)
- Sharon M Donovan
- Department of Food Science and Human Nutrition, University of Illinois, Urbana, IL 61801, USA.
| | - Mei Wang
- Department of Food Science and Human Nutrition, University of Illinois, Urbana, IL 61801, USA
| | - Marcia H Monaco
- Department of Food Science and Human Nutrition, University of Illinois, Urbana, IL 61801, USA
| | - Camilia R Martin
- Department of Neonatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Laurie A Davidson
- Department of Nutrition & Food Science and Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843-2253, USA; Center for Translational Environmental Health Research, Texas A&M University, College Station, TX 77843-2253, USA
| | - Ivan Ivanov
- Department of Nutrition & Food Science and Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843-2253, USA; Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843-2253, USA; Center for Translational Environmental Health Research, Texas A&M University, College Station, TX 77843-2253, USA
| | - Robert S Chapkin
- Department of Nutrition & Food Science and Program in Integrative Nutrition and Complex Diseases, Texas A&M University, College Station, TX 77843-2253, USA; Center for Translational Environmental Health Research, Texas A&M University, College Station, TX 77843-2253, USA
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Probiotics and prebiotics in neonatal necrotizing enterocolitis: New opportunities for translational research. ACTA ACUST UNITED AC 2014; 21:35-46. [PMID: 24594006 DOI: 10.1016/j.pathophys.2013.11.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Neonatal necrotizing enterocolitis (NEC) in premature infants has been recognized as a defined disease entity for at least four decades. Although survival has increased due to the advent of more sophisticated intensive care, incidence and long term health impacts due to NEC remain unchanged and no preventive therapy is currently available. Different probiotic strains of bacteria have been examined in their ability to prevent NEC with varied but encouraging results. Undigestable prebiotic sugars known to promote the growth of probiotic bacteria in the colon have been used in neonates with no clear benefit. The literature on NEC and probiotics is now cluttered with more reviews and meta-analyses than number of clinical trials. On the other hand, significant new information is available on microbiota and their impact on gut immunity. This review attempts to reiterate the risk factors of NEC and the pathogenesis of NEC with special reference to gut permeability. The reader is then introduced to gut microbiota, uniqueness and differences among probiotic strains, and how multiple resident flora talk to each other in the community setting in the human gut. After presenting a concise review of available clinical research results, the reader is challenged to question as to why no precise answer is available at present. Some modalities to examine the complex microflora and changes in the neonatal gut are then proposed including non-invasive methods and mathematical modeling. The review concludes by attracting the reader's attention to known immunomodulators of inflammation and injury. Justice to this review will be done only if the readers, clinical, and basic science investigators from multiple fields gather courage for a paradigm shift and embark on understanding the pathophysiology of the disease and attempt to discern the difference from equally preterm, equally vulnerable neonates that do not develop NEC. Learning about the developing microbiota in neonatal gut and its immunological impacts on the host in the face of many variables will provide a leap in our pursuit to select better, if not the best candidate probiotics, and put them to work against this stubborn disease that continues to take a toll on our precious neonates and the society.
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15
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Neeha VS, Kinth P. Nutrigenomics research: a review. Journal of Food Science and Technology 2012; 50:415-28. [PMID: 24425937 DOI: 10.1007/s13197-012-0775-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 06/29/2012] [Accepted: 07/02/2012] [Indexed: 12/28/2022]
Abstract
The excitement about nutrigenomics comes from a growing awareness of the potential for modifications of food or diet to support health and reduce the risk of diet-related diseases. It is an emerging field that tends to unfold the role of nutrition on gene expression which brings together the science of bioinformatics, nutrition, molecular biology, genomics, epidemiology, and molecular medicine. The present review focuses on nutrigenomics research and to find out India's status with respect to other countries. It covers the general overview of nutrigenomics, its associated diseases, and the role of SNP in gene alteration, diet supplementation and public awareness. It is understood that with the increasing changes in the food habits and life styles, people are becoming more prone to diet related disorders. Therefore there is an urgent need to boost more research in this field to help people in understanding the relationship between diet and health, and to ensure that everyone benefits from the genomic revolution.
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Affiliation(s)
- V S Neeha
- NISCAIR (National Institute of Science Communication and Information Resources), 14 - Satsang Vihar Marg, Spl. Institutional Area, New Delhi, 110067 India
| | - Priyamvadah Kinth
- NISCAIR (National Institute of Science Communication and Information Resources), 14 - Satsang Vihar Marg, Spl. Institutional Area, New Delhi, 110067 India
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16
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Stool DNA screening for colorectal neoplasia: biological and technical basis for high detection rates. Pathology 2012; 44:80-8. [PMID: 22198259 DOI: 10.1097/pat.0b013e3283502fdf] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Colorectal cancer (CRC), the second most common cause of cancer-related mortality worldwide, is preventable with effective screening and removal of precursor lesions. Yet, screening efforts have been hampered by low participation rates and by performance limitations of the screening tools themselves. Stool DNA testing has emerged as a biologically rational and user-friendly strategy for the non-invasive detection of both CRC and critical precursor lesions. Unlike most conventional screening tools, stool DNA testing detects proximal and distal colorectal neoplasms equally well. Several key technical advances have led to increasingly accurate approaches for stool DNA testing including use of a DNA preservative buffer with stool collection, efficient target capture and amplification methods, broadly informative marker panels, and automated assay components. Based on recent studies, advanced multi-marker stool DNA tests including methylated markers, mutation markers and an assessment of faecal haemoglobin have been shown to detect CRC at sensitivities of 85% and higher and adenomas >1 cm at 60% and higher in a case-control environment. If the high accuracy of multi-marker stool tests is corroborated in multicentre screening studies on average-risk persons currently underway, then these stool tests could influence our CRC screening paradigm.This review discusses the biological basis, key technical advances, and recent clinical performance validation of stool DNA testing.
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Nair PP, Kamra A, Kessie G, Kalavapudi S, Chen JH, Shores R, Madairos L, Fasano A, Nair P. Markers of Inflammation and Lineage on Exfoliated Colonic Cells In Pediatric Inflammatory Bowel Disease. ACTA ACUST UNITED AC 2012; 8:1-6. [PMID: 23519721 DOI: 10.4172/2161-069x.s8-001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES The diagnosis (endoscopy, and biopsy) and continued clinical management of Inflammatory Bowel Disease (IBD), remain highly invasive, expensive, and inconvenient for the pediatric patient. The objective of this study was to see if colonocytes obtained from stools of subjects with IBD and normal controls would demonstrate higher levels of inflammatory markers (Cox 2 in CD45+ and CD45- cells) and if the inflammatory process and treatment effects would be reflected in an altered cytokine expression in the subjects compared to controls. SETTING Outpatient hospital based pediatric gastroenterology clinic. METHODS AND MAIN OUTCOME MEASURES Stool samples (~ 1 gm), were obtained from 18 children between the ages of 4 and 18 diagnosed with IBD, and from a normal first degree relative. Colonocytes were isolated using the Somatic Cell Sampling Recovery (SCSR) system and assessed for the expression of COX-2, CD-45, IgA, IgG, IL6, IL18, TGF β, TNF, and IL16β using flow cytometry. In addition, levels of COX-2 and cytokeratin 19 transcripts were measured by microwell plate hybridization assay. RESULTS Expression of COX-2 and co-expression of IgA and IgG were significantly higher in the IBD cases compared to the controls. In ulcerative colitis, the expression of COX-2 and co-expression of COX-2 and CD45 were greater than that in patients with Crohn's disease. In contrast, cells expressing IgA and IgG were higher in Crohn's. Subjects on immunosuppressants and/or anti-inflammatory medications, expressed significantly lower levels of COX-2 and IL-18 compared to those who were not on treatment. CONCLUSIONS This study indicates that the use of disease markers on exfoliated colonic cells can be used for non-invasive assessment of disease status, for follow-up of response to treatment and for forecasting flare-up of disease before its symptomatic manifestations.
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Affiliation(s)
- Padmanabhan P Nair
- NonInvasive Technologies, Elkridge, Maryland, USA ; Department of International Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
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18
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Survival of exfoliated epithelial cells: a delicate balance between anoikis and apoptosis. J Biomed Biotechnol 2011; 2011:534139. [PMID: 22131811 PMCID: PMC3205804 DOI: 10.1155/2011/534139] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Accepted: 08/22/2011] [Indexed: 01/21/2023] Open
Abstract
The recovery of exfoliated cells from biological fluids is a noninvasive technology which is in high demand in the field of translational research. Exfoliated epithelial cells can be isolated from several body fluids (i.e., breast milk, urines, and digestives fluids) as a cellular mixture (senescent, apoptotic, proliferative, or quiescent cells). The most intriguing are quiescent cells which can be used to derive primary cultures indicating that some phenotypes retain clonogenic potentials. Such exfoliated cells are believed to enter rapidly in anoikis after exfoliation. Anoikis can be considered as an autophagic state promoting epithelial cell survival after a timely loss of contact with extracellular matrix and cell neighbors. This paper presents current understanding of exfoliation along with the influence of methodology on the type of gastrointestinal epithelial cells isolated and, finally, speculates on the balance between anoikis and apoptosis to explain the survival of gastrointestinal epithelial cells in the environment.
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Chandel DS, Braileanu GT, Chen JHJ, Chen HH, Panigrahi P. Live colonocytes in newborn stool: surrogates for evaluation of gut physiology and disease pathogenesis. Pediatr Res 2011; 70:153-8. [PMID: 21544008 PMCID: PMC3140458 DOI: 10.1203/pdr.0b013e3182225ac9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Studies of gastrointestinal pathophysiology are not feasible by biopsies in human neonates. We examined the utility of live colonocytes in stool in studying cellular markers during early neonatal life. Expression of IgA, IgG, cluster of differentiation-45 cells (CD45), and toll-like receptors-2 and 4 (TLR2 and TLR4) were analyzed by flow cytometry. Colonocyte RNA extracts were used in quantitative real-time PCR (qRT-PCR) to examine the expression of cytokeratin-19, ribosomal protein-24, and tight-junction (Tj) protein zonula occludens-1 (ZO-1). Colonocyte yield varied between 5 × 10⁴ to 2 × 10⁶ cells/g of stool. Meconium samples yielded a highly enriched population of viable cells. Although low, all samples showed CD45-positive cells during the initial weeks of life. Starting as early as d 2, IgA expression was observed in 69% of the cells. Low to moderate expression of IgG was observed with a linear increase as the infants grew. There was an almost total lack of TLR2 staining; however, >55% of the colonocytes showed TLR4 expression. Although high levels of IgA in gut cells may serve as a natural protectant during neonatal period, increased TLR4 may provide a niche for lipopolysaccharide (LPS)-mediated epithelial damage. Use of stool colonocytes can be a valuable noninvasive approach for studying gut pathophysiology in the neonatal period.
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Affiliation(s)
- Dinesh S Chandel
- Department of Environmental, Agricultural and Occupational Health, Center for Global Health and Development, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska 68198, USA
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Kaeffer B. Exfoliated epithelial cells: potentials to explore gastrointestinal maturation of preterm infants. REVISTA BRASILEIRA DE SAÚDE MATERNO INFANTIL 2010. [DOI: 10.1590/s1519-38292010000100002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Exfoliated epithelial cells represent valuable source of information on the physiopathological state of the mucosa. However, the interpretation of data obtained from exfoliated cells is complicated by the conditions of isolation as well as the health of the subject. Exfoliation is either: a) a natural loss of body cells implying a molecular signal related to the turnover of terminally differentiated cells and to the progressive mobilization of proliferative as well as stem cells or b) the result of manual exfoliation by applying mechanical constraints like scraping. Depending on the methodology of isolation, exfoliated epithelial cells are believed to be either in apoptosis or in anoïkis. Most studies are using microscopic examination to demonstrate the presence of typical cells along with measurements on a limited number of biomarkers. Only few studies using proteomics or transcriptomics are available and they open discussion about tissue references and normalization. The main advantage of measures realized on exfoliated epithelial cells is that they are strictly non-invasive and open the possibility to evaluate maturation of gastric and intestinal tissues in long-term experiments performed on the same animal or in translational research on samples recovered from preterm infants.
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Huang CJ, Chien CC, Yang SH, Chang CC, Sun HL, Cheng YC, Liu CC, Lin SC, Lin CM. Faecal ribosomal protein L19 is a genetic prognostic factor for survival in colorectal cancer. J Cell Mol Med 2008; 12:1936-43. [PMID: 18266979 PMCID: PMC4506161 DOI: 10.1111/j.1582-4934.2008.00253.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Ribosomal proteins are encoded by a gene family, members of which are overexpressed in human cancers. Many of them have been found, using oligonucleotide microarray hybridization, to be differentially expressed in the faeces of patients with various stages of col-orectal cancer (CRC). The gene encoding ribosomal protein L19 (RPL19), a prognostic marker for human prostate cancer, is differentially expressed in CRC patients. Measurement of faecal RPL19 mRNA might improve prognostic prediction for CRC patients. Using quantitative real-time reverse transcription PCR, levels of RPL19 mRNA were detected in samples of colonic tissues from 44 CRC patients, in the faeces of 54 CRC patients and 15 controls, and in 11 colonic cell lines. Seven of 24 patients with late-stage CRC (Dukes' stages C and D) expressed over 2-fold more RPL19 in colonic tumour tissues than in corresponding normal tissues (P= 0.038). The mean faecal RPL19 mRNA levels of late-staged patients were higher than those of controls (P= 0.003) and early-staged patients (P= 0.008). Patients with both high serum levels of carcinoembryonic antigen (CEA; >5 ng/mL) and high-faecal RPL19 mRNA (≥0.0069) had higher risk (odds ratio, 8.0; P= 0.015) and lower overall 48-month survival (33.8 ± 13.7%, P= 0.013). Oligonucleotide microarray hybridization analysis of faecal molecules identified gene transcripts differentially present in faeces. In conclusion, faecal RPL19 expression is associated with advanced tumour stages and addictive to serum CEA in predicting prognosis of CRC patients.
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Affiliation(s)
- C-J Huang
- Molecular Genetics and Biochemistry Laboratory, Cathay Medical Research Institute, Cathay General Hospital, Taipei, Taiwan
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Loktionov A. Cell exfoliation in the human colon: myth, reality and implications for colorectal cancer screening. Int J Cancer 2007; 120:2281-9. [PMID: 17351899 DOI: 10.1002/ijc.22647] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Colonocyte exfoliation in the human colon constitutes a unique mechanism of cell population control that can undergo significant changes under different physiological and pathological conditions. Being closely related to the apoptosis and anoikis, cell exfoliation from colonic epithelium appears to be a relatively rare event in normal conditions, but its rate dramatically increases in neoplasia, when cell removal by apoptosis in situ does not function properly. Several studies show that significant numbers of exfoliated colonocytes are not lost in the faecal contents of the gut, but retained in the mucocellular layer overlying colonic mucosa. Recent observations allow hypothesizing that the mucocellular layer containing exfoliated colonocytes may gradually migrate distally, eventually leading to the accumulation of the cells exfoliated from malignant colorectal tumours on the surface of the rectal mucosa. Implications of exfoliated colonocyte analysis to colorectal cancer screening and early diagnosis are discussed.
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Donovan SM. Role of human milk components in gastrointestinal development: Current knowledge and future NEEDS. The journal The Journal of Pediatrics 2006. [DOI: 10.1016/j.jpeds.2006.06.052] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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