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Nozu T, Miyagishi S, Ishioh M, Takakusaki K, Okumura T. Phlorizin attenuates postoperative gastric ileus in rats. Neurogastroenterol Motil 2023; 35:e14659. [PMID: 37574874 DOI: 10.1111/nmo.14659] [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: 10/19/2022] [Revised: 05/04/2023] [Accepted: 07/31/2023] [Indexed: 08/15/2023]
Abstract
BACKGROUND Postoperative ileus (POI) is a major complication of abdominal surgery (AS). Impaired gut barrier mediated via Toll-like receptor 4 (TLR4) and interleukin-1 (IL-1) receptor is involved in the development of POI. Phlorizin is a nonselective inhibitor of sodium-linked glucose transporters (SGLTs) and is known to improve lipopolysaccharide (LPS)-induced impaired gut barrier. This study aimed to clarify our hypothesis that AS-induced gastric ileus is mediated via TLR4 and IL-1 signaling, and phlorizin improves the ileus. METHODS AS consisted of a celiotomy and manipulation of the cecum for 1 min. Gastric emptying (GE) in 20 min with liquid meal was determined 3 h after the surgery in rats. The effect of subcutaneous (s.c.) injection of LPS (1 mg kg-1 ) was also determined 3 h postinjection. KEY RESULTS AS delayed GE, which was blocked by TAK-242, an inhibitor of TLR4 signaling and anakinra, an IL-1 receptor antagonist. LPS delayed GE, which was also mediated via TLR4 and IL-1 receptor. Phlorizin (80 mg kg-1 , s.c.) significantly improved delayed GE induced by both AS and LPS. However, intragastrical (i.g.) administration of phlorizin did not alter it. As gut mainly expresses SGLT1, SGLT2 may not be inhibited by i.g. phlorizin. The effect of phlorizin was blocked by ghrelin receptor antagonist in the LPS model. CONCLUSIONS & INFERENCES AS-induced gastric ileus is mediated via TLR4 and IL-1 signaling, which is simulated by LPS. Phlorizin improves the gastric ileus via activation of ghrelin signaling, possibly by inhibition of SGLT2. Phlorizin may be useful for the treatment of POI.
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Affiliation(s)
- Tsukasa Nozu
- Department of Regional Medicine and Education, Asahikawa Medical University, Asahikawa, Japan
- Center for Medical Education, Asahikawa Medical University, Asahikawa, Japan
| | - Saori Miyagishi
- Department of Medicine, Division of Gastroenterology and Hematology/Oncology, Asahikawa Medical University, Asahikawa, Japan
| | - Masatomo Ishioh
- Department of Medicine, Division of Gastroenterology and Hematology/Oncology, Asahikawa Medical University, Asahikawa, Japan
| | - Kaoru Takakusaki
- Department of Physiology, Division of Neuroscience, Asahikawa Medical University, Asahikawa, Japan
| | - Toshikatsu Okumura
- Department of Medicine, Division of Gastroenterology and Hematology/Oncology, Asahikawa Medical University, Asahikawa, Japan
- Department of General Medicine, Asahikawa Medical University, Asahikawa, Japan
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Ma T, Xue X, Tian H, Zhou X, Wang J, Zhao Z, Wang M, Song J, Feng R, Li L, Jing C, Tian F. Effect of the gut microbiota and their metabolites on postoperative intestinal motility and its underlying mechanisms. J Transl Med 2023; 21:349. [PMID: 37237321 DOI: 10.1186/s12967-023-04215-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023] Open
Abstract
Gut microbiota is closely related to human health and disease because, together with their metabolites, gut microbiota maintain normal intestinal peristalsis. The use of antibiotics or opioid anesthetics, or both, during surgical procedures can lead to dysbiosis and affect intestinal motility; however, the underlying mechanisms are not fully known. This review aims to discuss the effect of gut microbiota and their metabolites on postoperative intestinal motility, focusing on regulating the enteric nervous system, 5-hydroxytryptamine neurotransmitter, and aryl hydrocarbon receptor.
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Affiliation(s)
- TianRong Ma
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
| | - XiaoLei Xue
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Department of Pharmacy, The Second Affiliated Hospital of Shandong First Medical University, Taian, 271000, China
| | - Hui Tian
- Department of Gastroenterology, Liaocheng People's Hospital, Shandong First Medical University, Liaocheng, 252000, China
| | - XinXiu Zhou
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
| | - JunKe Wang
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
| | - ZhiWen Zhao
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
| | - MingFei Wang
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China
| | - JiYuan Song
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China
| | - RenXiang Feng
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China
| | - Leping Li
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China
| | - Changqing Jing
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China.
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China.
| | - Feng Tian
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China.
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China.
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Yang J, Deng Y, Cai Y, Liu Y, Peng L, Luo Z, Li D. Mapping trends and hotspot regarding gastrointestinal microbiome and neuroscience: A bibliometric analysis of global research (2002-2022). Front Neurosci 2022; 16:1048565. [PMID: 36466165 PMCID: PMC9714683 DOI: 10.3389/fnins.2022.1048565] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 10/28/2022] [Indexed: 08/10/2023] Open
Abstract
BACKGROUND Scholars have long understood that gastrointestinal microorganisms are intimately related to human disorders. The literature on research involving the gut microbiome and neuroscience is emerging. This study exposed the connections between gut microbiota and neuroscience methodically and intuitively using bibliometrics and visualization. This study's objectives were to summarize the knowledge structure and identify emerging trends and potential hotspots in this field. MATERIALS AND METHODS On October 18, 2022, a literature search was conducted utilizing the Web of Science Core Collection (WoSCC) database for studies on gut microbiota and neuroscience studies from 2002 to 2022 (August 20, 2022). VOSviewer and CiteSpace V software was used to conduct the bibliometrics and visualization analysis. RESULTS From 2002 to 2022 (August 20, 2022), 2,275 publications in the WoSCC database satisfied the criteria. The annual volume of publications has rapidly emerged in recent years (2016-2022). The most productive nation (n = 732, 32.18%) and the hub of inter-country cooperation (links: 38) were the United States. University College Cork had the most research papers published in this area, followed by McMaster University and Harvard Medical School. Cryan JF, Dinan TG, and Clarke G were key researchers with considerable academic influence. The journals with the most publications are "Neurogastroenterology and Motility" and "Brain Behavior and Immunity." The most cited article and co-cited reference was Cryan JF's 2012 article on the impact of gut microbiota on the brain and behavior. The current research hotspot includes gastrointestinal microbiome, inflammation, gut-brain axis, Parkinson's disease (PD), and Alzheimer's disease (AD). The research focus would be on the "gastrointestinal microbiome, inflammation: a link between obesity, insulin resistance, and cognition" and "the role of two important theories of the gut-brain axis and microbial-gut-brain axis in diseases." Burst detection analysis showed that schizophrenia, pathology, and psychiatric disorder may continue to be the research frontiers. CONCLUSION Research on "gastrointestinal microbiome, inflammation: a link between obesity, insulin resistance, and cognition" and "the role of two important theories of the gut-brain axis and microbial-gut-brain axis in diseases" will continue to be the hotspot. Schizophrenia and psychiatric disorder will be the key research diseases in the field of gut microbiota and neuroscience, and pathology is the key research content, which is worthy of scholars' attention.
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Affiliation(s)
- Jingjing Yang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Yihui Deng
- Hunan University of Chinese Medicine, Changsha, China
| | - Yuzhe Cai
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Yixuan Liu
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Lanyu Peng
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Zheng Luo
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Dingxiang Li
- Hunan University of Chinese Medicine, Changsha, China
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Schneider R, Leven P, Mallesh S, Breßer M, Schneider L, Mazzotta E, Fadda P, Glowka T, Vilz TO, Lingohr P, Kalff JC, Christofi FL, Wehner S. IL-1-dependent enteric gliosis guides intestinal inflammation and dysmotility and modulates macrophage function. Commun Biol 2022; 5:811. [PMID: 35962064 PMCID: PMC9374731 DOI: 10.1038/s42003-022-03772-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 07/26/2022] [Indexed: 11/08/2022] Open
Abstract
Muscularis Externa Macrophages (ME-Macs) and enteric glial cells (EGCs) are closely associated cell types in the bowel wall, and important interactions are thought to occur between them during intestinal inflammation. They are involved in developing postoperative ileus (POI), an acute, surgery-induced inflammatory disorder triggered by IL-1 receptor type I (IL1R1)-signaling. In this study, we demonstrate that IL1R1-signaling in murine and human EGCs induces a reactive state, named enteric gliosis, characterized by a strong induction of distinct chemokines, cytokines, and the colony-stimulating factors 1 and 3. Ribosomal tagging revealed enteric gliosis as an early part of POI pathogenesis, and mice with an EGC-restricted IL1R1-deficiency failed to develop postoperative enteric gliosis, showed diminished immune cell infiltration, and were protected from POI. Furthermore, the IL1R1-deficiency in EGCs altered the surgery-induced glial activation state and reduced phagocytosis in macrophages, as well as their migration and accumulation around enteric ganglia. In patients, bowel surgery also induced IL-1-signaling, key molecules of enteric gliosis, and macrophage activation. Together, our data show that IL1R1-signaling triggers enteric gliosis, which results in ME-Mac activation and the development of POI. Intervention in this pathway might be a useful prophylactic strategy in preventing such motility disorders and gut inflammation.
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Affiliation(s)
| | - Patrick Leven
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | | | - Mona Breßer
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | - Linda Schneider
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | - Elvio Mazzotta
- Department of Anesthesiology, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - Paola Fadda
- Department of Anesthesiology, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - Tim Glowka
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | - Tim O Vilz
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | - Philipp Lingohr
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | - Jörg C Kalff
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | - Fievos L Christofi
- Department of Anesthesiology, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - Sven Wehner
- Department of Surgery, University Hospital Bonn, Bonn, Germany.
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Lin S, Mukherjee S, Li J, Hou W, Pan C, Liu J. Mucosal immunity-mediated modulation of the gut microbiome by oral delivery of probiotics into Peyer's patches. SCIENCE ADVANCES 2021; 7:7/20/eabf0677. [PMID: 33980483 PMCID: PMC8115924 DOI: 10.1126/sciadv.abf0677] [Citation(s) in RCA: 94] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 03/23/2021] [Indexed: 05/02/2023]
Abstract
Methods capable of maintaining gut microbiota homeostasis to prevent bacterial translocation and infection under external threats are critical for multiple facets of human health but have been rarely reported. Here, we describe the elicitation of mucosal immunity to modulate the gut microbiota by oral delivery of living probiotics into Peyer's patches. Probiotics are individually camouflaged within a yeast membrane, on which the embedded β-glucan can facilitate the phagocytosis of microfold cells that locate in the intestinal epithelium. The delivery of probiotics into lymphoid follicles after oral ingestion promotes robust mucosal immune responses and notably upgrades the production of secretory immunoglobulin A. The provoked immunity positively regulates the gut microflora, which, in turn, retains gut homeostasis and provides defense against environmental attacks. In two murine models of gut barrier impairment, oral administration with camouflaged probiotics effectively prevents the breakdown of intestinal barrier and evidences limited bacterial translocation and systemic inflammation.
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Affiliation(s)
- Sisi Lin
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
| | - Subhajit Mukherjee
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
| | - Juanjuan Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
| | - Weiliang Hou
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
| | - Chao Pan
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
| | - Jinyao Liu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China.
- Shanghai Key Laboratory of Gynecologic Oncology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
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Lin S, Kühn F, Schiergens TS, Zamyatnin AA, Isayev O, Gasimov E, Werner J, Li Y, Bazhin AV. Experimental postoperative ileus: is Th2 immune response involved? Int J Med Sci 2021; 18:3014-3025. [PMID: 34220330 PMCID: PMC8241774 DOI: 10.7150/ijms.59354] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 05/24/2021] [Indexed: 12/14/2022] Open
Abstract
Rationale: Postoperative ileus (POI) is a frequent complication arising after gastrointestinal surgery but pathogenesis of POI is still not fully understood. While Th1 immune cells are implicated in POI, the involvement of Th2 cells has not yet been clarified. Given the impact of reactive oxygen species (ROS) in the regulation of Th1 and Th2 balance, we hypothesized that not only Th1 but also Th2 immune response can be involved in the development of experimental POI. Methods: The intestinal transit test was performed using carbon gum arabic. Electron microscopy was employed to assess tissue morphology and the presence of immune cells. Cytokines, IgE and ROS were measured. Immune cells from Peyer's patches were analyzed by Flow Cytometry and toluidine blue staining was used for detection of mast cells. Transcriptional factors were analyzed by Western blot. Results: POI is associated with an increase in both Th2 cytokines and Th2 cells. We have further demonstrated that POI induces a Th2-dependent activation of memory and non-memory B cells. This was accompanied by an increase in a number of mast cells in the colon of POI mice as well by an increased IgE and histamine plasma levels. We found that POI-induced accumulation of ROS was associated with an increased expression of the transcriptional factors HMBGI, NF-κB, and p38. This increased expression seemed to be associated with a Th2 response. Conclusion: Th2 immune response can be involved in the activation of mast cells in POI, which was associated with ROS mediated activation of NF-κB and p38 MAPK signaling pathway.
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Affiliation(s)
- Sisi Lin
- Department of Pathophysiology, Institute of Digestive Disease, Tongji University School of Medicine, 200092, Shanghai, China.,Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU Munich, 81377, Munich, Germany
| | - Florian Kühn
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU Munich, 81377, Munich, Germany
| | - Tobias S Schiergens
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU Munich, 81377, Munich, Germany.,German Cancer Consortium (DKTK), Partner Site Munich, 81377 Munich, Germany
| | - Andrey A Zamyatnin
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, 119991, Moscow, Russia.,Department of Cell Signaling, Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Orkhan Isayev
- Department of Histology, Embryology and Cytology, Azerbaijan Medical University, Baku, Azerbaijan
| | - Eldar Gasimov
- Department of Histology, Embryology and Cytology, Azerbaijan Medical University, Baku, Azerbaijan
| | - Jens Werner
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU Munich, 81377, Munich, Germany.,German Cancer Consortium (DKTK), Partner Site Munich, 81377 Munich, Germany
| | - Yongyu Li
- Department of Pathophysiology, Institute of Digestive Disease, Tongji University School of Medicine, 200092, Shanghai, China
| | - Alexandr V Bazhin
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU Munich, 81377, Munich, Germany.,German Cancer Consortium (DKTK), Partner Site Munich, 81377 Munich, Germany
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Traditional Chinese Medicine Da-Cheng-Qi-Tang Ameliorates Impaired Gastrointestinal Motility and Intestinal Inflammatory Response in a Mouse Model of Postoperative Ileus. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:9074069. [PMID: 32802139 PMCID: PMC7415087 DOI: 10.1155/2020/9074069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 07/13/2020] [Indexed: 11/17/2022]
Abstract
This study was to explore the therapeutic effect and mechanism of the traditional Chinese medicine with the formula Da-Cheng-Qi-Tang (T-DCQT) and a modified Da-Cheng-Qi-Tang (M-DCQT) in a postoperative ileus (POI) mouse model. POI was induced via small bowel manipulation, and T-DCQT or M-DCQT was given by enema. The intestinal motility was measured with a charcoal mixture gavage. The intestinal tissues were collected for further studies by histopathological, qPCR, immunohistochemical staining, and Western blotting. Levels of inflammatory cytokines in blood were determined using a high-throughput liquid chip. We found that gastrointestinal dysfunction was alleviated after administration of either a T-DCQT or M-DCQT enema. Increased expression of NF-κB, p38 MAPK, and TLR4 in the intestinal tissues of POI mice were reversed following treatment. IL-1α, IL-6, MIP-1β, and IL-17 levels were significantly reduced at 24 h and 48 h following treatment, while the MCP-1 level was only observed to be reduced at 24 h after the treatment. Furthermore, compared with the T-DCQT effect, M-DCQT treatment was more effective in alleviating the increased IL-6, MIP-1β, and IL-1α levels. So, we draw a conclusion that T-DCQT or M-DCOT could ameliorate the POI-associated inflammatory response and improve GI motility in a POI mouse model.
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Siswandi R, Yoshida A, Satoh H, Nonaka N. X-ray evaluation of intestinal dysmotility induced by Eimeria pragensis infection in C57BL/6 mice. J Vet Med Sci 2019; 81:1021-1028. [PMID: 31118353 PMCID: PMC6656811 DOI: 10.1292/jvms.19-0137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This study was conducted to elucidate the intestinal dysmotility during coccidiosis. C57BL/6 male mice at seven weeks of age were inoculated with Eimeria pragensis sporulated oocysts (100 to 1,000 oocysts). The intestinal motility was evaluated by observing discharging time of barium sulfate (Ba2SO4) after oral administration (WITT: the whole intestinal transit time). The exact location of the dysmotility was analyzed by intermittent barium gastrography. Upper intestinal dysmotility was evaluated by charcoal propulsion study. Additionally, the occurrence of dysmotility was observed at different post-infection times (4, 7, and 14 days post-infection (d.p.i.)) and in infection-dose dependent manner (100, 300, and 1,000 oocysts). As the E. pragensis infected mice had significantly lower feed intake compared to the control group, we designed a feed apprehension study to evaluate the effect of low feed intake on the intestinal dysmotility. The WITT of infected mice at 7 d.p.i. was significantly longer (6 hr) than the uninfected mice (2.5 hr). Intestinal dysmotility was observed in the small intestine, caecum, and colorectum in the infected mice. Charcoal propulsion was slower in infected group (reaching to 40.4% of the whole small intestine) compared to control group (68.0%). The dysmotility was observed at the beginning of the patent period (7 d.p.i.) and subsided as the patency ended (14 d.p.i.). Mice with lower feed intake appeared to have similar intestinal motility as control mice. In summary, this study revealed the evidence of intestinal hypomotility during E. pragensis infection.
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Affiliation(s)
- Riki Siswandi
- Laboratory of Veterinary Parasitic Diseases, Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, 1-1, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan.,Faculty of Veterinary Medicine, IPB University, Kampus IPB Dramaga Bogor, 16680 West Java, Indonesia
| | - Ayako Yoshida
- Laboratory of Veterinary Parasitic Diseases, Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, 1-1, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan.,Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan
| | - Hiroyuki Satoh
- Laboratory of Veterinary Clinical Radiology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan
| | - Nariaki Nonaka
- Laboratory of Veterinary Parasitic Diseases, Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, 1-1, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan.,Laboratory of Veterinary Parasitic Diseases, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1, Gakuen-Kibanadai Nishi, Miyazaki 889-2192, Japan
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