{"title":"Augmenting anti-inflammatory macrophage function in colitis: a neuroimmune mechanism to drive intestinal wound repair.","authors":"Natalie Bhesania, Michael A Schumacher","doi":"10.1152/ajpgi.00368.2024","DOIUrl":"10.1152/ajpgi.00368.2024","url":null,"abstract":"","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G94-G95"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12068187/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Is LPAR5 agonist a new treatment for microvilli inclusion disease?","authors":"C Chris Yun","doi":"10.1152/ajpgi.00355.2024","DOIUrl":"10.1152/ajpgi.00355.2024","url":null,"abstract":"","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G49-G50"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12165318/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142715195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luis M Ramírez-Maldonado, Julio Guerrero-Castro, José L Rodríguez-Mejía, Yair Cárdenas-Conejo, Edgar O Bonales-Alatorre, Georgina Valencia-Cruz, Paulina T Anguiano-García, Irving I Vega-Juárez, Adán Dagnino-Acosta, Jessica Ruvalcaba-Galindo, Eduardo E Valdez-Morales, Fernando Ochoa-Cortes, Alma Barajas-Espinosa, Raquel Guerrero-Alba, Andrómeda Liñán-Rico
{"title":"Obesogenic cafeteria diet induces dynamic changes in gut microbiota, reduces myenteric neuron excitability, and impairs gut contraction in mice.","authors":"Luis M Ramírez-Maldonado, Julio Guerrero-Castro, José L Rodríguez-Mejía, Yair Cárdenas-Conejo, Edgar O Bonales-Alatorre, Georgina Valencia-Cruz, Paulina T Anguiano-García, Irving I Vega-Juárez, Adán Dagnino-Acosta, Jessica Ruvalcaba-Galindo, Eduardo E Valdez-Morales, Fernando Ochoa-Cortes, Alma Barajas-Espinosa, Raquel Guerrero-Alba, Andrómeda Liñán-Rico","doi":"10.1152/ajpgi.00198.2024","DOIUrl":"10.1152/ajpgi.00198.2024","url":null,"abstract":"<p><p>The cafeteria diet (CAF) is a superior diet model in animal experiments compared with the conventional high-fat diet (HFD), effectively inducing obesity, metabolic disturbances, and multi-organ damage. Nevertheless, its impact on gut microbiota composition during the progression of obesity, along with its repercussions on the enteric nervous system (ENS) and gastrointestinal motility has not been completely elucidated. To gain more insight into the effects of CAF diet in the gut, C57BL/6 mice were fed with CAF or a standard diet for 2 or 8 wk. CAF-fed mice experienced weight gain, disturbed glucose metabolism, dysregulated expression of colonic IL-6, IL-22, TNFα, and TPH1, and altered colon morphology, starting at <i>week 2</i>. Fecal DNA was isolated and gut microbiota composition was monitored by sequencing the V3-V4 16S rRNA region. Sequence analysis revealed that <i>Clostridia</i> and <i>Proteobacteria</i> were specific biomarkers associated with CAF-feeding at <i>week 2</i>, while <i>Bacteroides</i> and <i>Actinobacteria</i> were prominent at <i>week 8</i>. In addition, the impact of CAF diet on ENS was investigated (<i>week 8</i>), where HuC/D+ neurons were measured and counted, and their biophysical properties were evaluated by patch clamp. Gut contractility was tested in whole-mount preparations. Myenteric neurons in CAF-fed mice exhibited reduced body size, incremented cell density, and decreased excitability. The amplitude and frequency of the rhythmic spontaneous contractions in the colon and ileum were affected by the CAF diet. Our findings demonstrate, for the first time, that CAF diet gradually changes the gut microbiota and promotes low-grade inflammation, impacting the functional properties of myenteric neurons and gut contractility in mice.<b>NEW & NOTEWORTHY</b> The gut microbiota changes gradually following the consumption of CAF diet. An increase in <i>Clostridia</i> and <i>Proteobacteria</i> is a hallmark of dysbiosis at the early onset of gut inflammation and obesity. The CAF diet was effective in inducing intestinal low-grade inflammation and alterations in myenteric neuronal excitability in mice. CAF diet is a reliable strategy to study the interplay between gut dysbiosis and low-grade inflammation, in addition to the mechanisms underlying gastrointestinal dysmotility associated with obesity.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G32-G48"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sarah Penrod, Xiaofang Tang, Changsuk Moon, Jeffrey A Whitsett, Anjaparavanda P Naren, Yunjie Huang
{"title":"EMC3 is critical for CFTR function and calcium mobilization in the mouse intestinal epithelium.","authors":"Sarah Penrod, Xiaofang Tang, Changsuk Moon, Jeffrey A Whitsett, Anjaparavanda P Naren, Yunjie Huang","doi":"10.1152/ajpgi.00066.2024","DOIUrl":"10.1152/ajpgi.00066.2024","url":null,"abstract":"<p><p>Membrane proteins, such as the cystic fibrosis transmembrane-conductance regulator (CFTR), play a crucial role in gastrointestinal functions and health. Endoplasmic reticulum (ER) membrane protein complex (EMC), a multi-subunit insertase, mediates the incorporation of membrane segments into lipid bilayers during protein synthesis. Whether EMC regulates membrane proteins' processing and function in intestinal epithelial cells remains unclear. To investigate the role of EMC in the intestinal epithelium, we generated mice in which EMC subunit 3 (EMC3) was deleted in intestinal epithelial cells (EMC3<sup>ΔIEC</sup>). EMC3<sup>ΔIEC</sup> mice were viable but notably smaller compared with their wild-type littermates. Although the intestinal structure was generally maintained, EMC3<sup>ΔIEC</sup> crypts exhibited altered morphology, particularly at the base of the crypts with decreased goblet cells and paneth cells. Levels of multiple polytopic membrane proteins, including CFTR, were decreased in EMC3-deficient epithelial cells. Several calcium ATPase pumps were downregulated, and calcium mobilization was impaired in EMC3<sup>ΔIEC</sup> enteroids. CFTR-mediated organoid swelling in EMC3<sup>ΔIEC</sup> mice was impaired in response to both cAMP-dependent signaling and calcium-secretagogue stimulation. Our study demonstrated that EMC plays a critical role in maintaining intestinal epithelium homeostasis by regulating membrane protein biogenesis and intracellular calcium homeostasis. Maintaining intracellular calcium homeostasis may be a universal cellular function regulated by EMC.<b>NEW & NOTEWORTHY</b> We generated mice in which endoplasmic reticulum membrane protein complex (EMC) subunit 3 was deleted from intestinal epithelium cells and studied the molecular functions of EMC in vivo. Our findings demonstrate the importance of intestinal EMC in the biogenesis of membrane proteins in vivo, including CFTR, and highlight its critical role in maintaining intracellular calcium homeostasis and, consequently, in calcium-dependent functions in the intestine and beyond.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G72-G82"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901349/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142783981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Blanca E Callejas, James A Sousa, Kyle L Flannigan, Arthur Wang, Eve Higgins, Aydin I Herik, Shuhua Li, Sruthi Rajeev, Ryan Rosentreter, Remo Panaccione, Derek M McKay
{"title":"Calcitonin gene-related peptide promotes epithelial reparative and anticolitic functions of IL-4 educated human macrophages.","authors":"Blanca E Callejas, James A Sousa, Kyle L Flannigan, Arthur Wang, Eve Higgins, Aydin I Herik, Shuhua Li, Sruthi Rajeev, Ryan Rosentreter, Remo Panaccione, Derek M McKay","doi":"10.1152/ajpgi.00159.2024","DOIUrl":"10.1152/ajpgi.00159.2024","url":null,"abstract":"<p><p>Interleukin-4 activated human macrophages [M(IL4)s] promote epithelial wound healing and exert an anticolitic effect in a murine model. Blood monocyte-derived M(IL4)s from healthy donors and individuals with Crohn's disease had increased mRNA expression of the calcitonin gene-related peptide (CGRP) receptor chain, receptor activity modifying protein-1 (RAMP1), raising the issue of neural modulation of the M(IL4)s reparative function. Thus, human M(IL4)s were treated with CGRP and the cells' phagocytotic, epithelial wound repair and anticolitic functions were assessed. Initial studies confirmed upregulation of expression of the CGRP receptor, which was localized to the cell surface and was functional as determined by CGRP-evoked increases in cAMP. M(IL4,CGRP)s had increased mannose receptor (CD206) and FcγRIIa (CD32a) mRNA expression, a subtle, but significant, increase in phagocytosis and decreased chemokine production following the exposure to <i>Escherichia coli</i>. When delivered systemically (10<sup>6</sup> cells IP) to oxazolone-treated <i>rag1<sup>-/-</sup></i> mice, M(IL4,CGRP) had an anticolitic effect superior to M(IL4)s from the same blood donor. Conditioned medium (CM) from M(IL4,CGRP) had increased amounts of transforming growth factor (TGF)-β and increased wound-healing capacity compared with matched M(IL4)-CM in the human CaCo<sub>2</sub> epithelial cell line in-vitro wounding assay. Moreover, M(IL4,CGRP)s displayed increased cyclooxygenase (COX)-1 and prostaglandin D<sub>2</sub> (PGD<sub>2</sub>), and CM from M(IL4,CGRP)s treated with indomethacin or SC-560 to inhibit COX-1 activity failed to promote repair of wounded CaCo<sub>2</sub> cell monolayers. These data confirm the human M(IL4)s' anticolitic effect that was enhanced by CGRP and may be partially dependent on macrophage COX-1/PGD<sub>2</sub> activity. Thus, input from neurone-derived molecules is a local modifier capable of boosting the anticolitic effect of autologous M(IL4) transfer.<b>NEW & NOTEWORTHY</b> A novel pathway is identified whereby interleukin-4-educated human macrophages [M(IL4)s] exposed to calcitonin gene-related peptide (CGRP) reduce oxazolone-induced colitis and promote epithelial wound healing in vitro through COX1-dependent signaling. Support is provided for the concept of macrophage transfer to treat enteric inflammation where neuroimmune interaction, in this case CGRP neuropeptide, produced under inflammatory conditions will reinforce the anticolitic and wound repair capacity of M(IL4) autologous-based therapy for IBD treatment.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G1-G16"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142387332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Early subclinical stages of the inflammatory bowel diseases: insights from human and animal studies.","authors":"Cecelia Kelly, R Balfour Sartor, John F Rawls","doi":"10.1152/ajpgi.00252.2024","DOIUrl":"10.1152/ajpgi.00252.2024","url":null,"abstract":"<p><p>The inflammatory bowel diseases (IBD) occur in genetically susceptible individuals that mount inappropriate immune responses to their microbiota leading to chronic intestinal inflammation. The natural history of IBD progression begins with early subclinical stages of disease that occur before clinical diagnosis. Improved understanding of those early subclinical stages could lead to new or improved strategies for IBD diagnosis, prognostication, or prevention. Here, we review our current understanding of the early subclinical stages of IBD in humans including studies from first-degree relatives of patients with IBD and members of the general population who go on to develop IBD. We also discuss representative mouse models of IBD that can be used to investigate disease dynamics and host-microbiota relationships during these early stages. In particular, we underscore how mouse models of IBD that develop disease later in life with variable penetrance may present valuable opportunities to discern early subclinical mechanisms of disease before histological inflammation and other severe symptoms become apparent.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G17-G31"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901386/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142581774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Malte Hasle Nielsen, Jacob Nøhr-Meldgaard, Mathias Bonde Møllerhøj, Denise Oró, Susanne E Pors, Maja Worm Andersen, Ioannis Kamzolas, Evangelia Petsalaki, Michele Vacca, Lea Mørch Harder, James W Perfield, Sanne Veidal, Henrik H Hansen, Michael Feigh
{"title":"Characterization of six clinical drugs and dietary intervention in the nonobese CDAA-HFD mouse model of MASH and progressive fibrosis.","authors":"Malte Hasle Nielsen, Jacob Nøhr-Meldgaard, Mathias Bonde Møllerhøj, Denise Oró, Susanne E Pors, Maja Worm Andersen, Ioannis Kamzolas, Evangelia Petsalaki, Michele Vacca, Lea Mørch Harder, James W Perfield, Sanne Veidal, Henrik H Hansen, Michael Feigh","doi":"10.1152/ajpgi.00110.2024","DOIUrl":"10.1152/ajpgi.00110.2024","url":null,"abstract":"<p><p>The choline-deficient l-amino acid defined-high-fat diet (CDAA-HFD) mouse model is widely used in preclinical metabolic dysfunction-associated steatohepatitis (MASH) research. To validate the CDAA-HFD mouse, we evaluated disease progression and responsiveness to dietary and pharmacological interventions with semaglutide, lanifibranor, elafibranor, obeticholic acid (OCA), firsocostat, and resmetirom. Disease phenotyping was performed in C57BL/6J mice fed CDAA-HFD for 3-20 wk and ranked using the MASLD Human Proximity Score (MHPS). Semaglutide, lanifibranor, elafibranor, OCA, firsocostat, or resmetirom were profiled as treatment intervention for 8 wk, starting after 6 wk of CDAA-HFD feeding. Semaglutide and lanifibranor were further evaluated as early (preventive) therapy for 9 wk, starting 3 wk after CDAA-HFD diet feeding. In addition, benefits of dietary intervention (chow reversal) for 8 wk were characterized following 6 wk of CDAA-HFD feeding. CDAA-HFD mice demonstrated a nonobese phenotype with fast onset and progression of MASH and fibrosis, high similarity to human MASH-fibrosis, and tumor development after 20 wk of diet-induction. Semaglutide and lanifibranor partially reversed fibrosis when administered as prevention but not as treatment intervention. Elafibranor was the only interventional drug therapy to improve fibrosis. In comparison, chow-reversal resulted in complete regression of steatosis with improved liver inflammation and fibrosis in CDAA-HFD mice. CDAA-HFD mice recapitulate histological hallmarks of advanced MASH with progressive severe fibrosis, however, in the absence of a clinical translational obese dysmetabolic phenotype. CDAA-HFD mice are suitable for profiling drug candidates directly targeting hepatic lipid metabolism, inflammation, and fibrosis. The timing of pharmacological intervention is critical for determining antifibrotic drug efficacy in the model.<b>NEW & NOTEWORTHY</b> The CDAA-HFD mouse model is widely used in preclinical MASH research, but validation of the model is lacking. This study presents the longitudinal characterization of disease progression. Furthermore, late-stage clinical compounds and dietary intervention (chow reversal) display distinct hepatoprotective effects in the model. Collectively, the study provides critical information guiding the use of the CDAA-HFD mouse model in preclinical drug discovery for MASH and fibrosis.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G51-G71"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142456091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haley N Patton, Hanyu Zhang, Garrett A Wood, Bijay Guragain, Nipuni D Nagahawatte, Linley A Nisbet, Leo K Cheng, Gregory P Walcott, Jack M Rogers
{"title":"Simultaneous optical imaging of gastric slow waves and contractions in the in vivo porcine stomach.","authors":"Haley N Patton, Hanyu Zhang, Garrett A Wood, Bijay Guragain, Nipuni D Nagahawatte, Linley A Nisbet, Leo K Cheng, Gregory P Walcott, Jack M Rogers","doi":"10.1152/ajpgi.00033.2024","DOIUrl":"10.1152/ajpgi.00033.2024","url":null,"abstract":"<p><p>Gastric peristalsis is governed by electrical \"slow waves\" generally assumed to travel from proximal to distal stomach (antegrade propagation) in symmetric rings. Although alternative slow-wave patterns have been correlated with gastric disorders, their mechanisms and how they alter contractions remain understudied. Optical electromechanical mapping, a developing field in cardiac electrophysiology, images electrical and mechanical physiology simultaneously. Here, we translate this technology to the in vivo porcine stomach. Stomachs were surgically exposed and a fluorescent dye (di-4-ANEQ(F)PTEA) that transduces the membrane potential (<i>V</i><sub>m</sub>) was injected through the right gastroepiploic artery. Fluorescence was excited by LEDs and imaged with one or two 256 × 256 pixel cameras. Motion artifact was corrected using a marker-based motion-tracking method and excitation ratiometry, which cancels common-mode artifact. Tracking marker displacement also enabled gastric deformation to be measured. We validated detection of electrical activation and <i>V</i><sub>m</sub> morphology against alternative nonoptical technologies. Nonantegrade slow waves and propagation direction differences between the anterior and posterior stomach were commonly present in our data. However, sham experiments suggest they were a feature of the animal preparation and not an artifact of optical mapping. In experiments to demonstrate the method's capabilities, we found that repolarization did not always follow at a fixed time behind activation \"wavefronts,\" which could be a factor in dysrhythmia. Contraction strength and the latency between electrical activation and contraction differed between antegrade and nonantegrade propagation. In conclusion, optical electromechanical mapping, which simultaneously images electrical and mechanical activity, enables novel questions regarding normal and abnormal gastric physiology to be explored.<b>NEW & NOTEWORTHY</b> This article introduces a novel method for imaging gastric electrophysiology and mechanical function simultaneously in anesthetized, open-abdomen pigs. We demonstrate it by observing propagating slow-wave depolarization and repolarization along with the strength, spatial distribution, and direction of contractions. In addition, we observe that in this animal preparation, slow waves often do not propagate from the proximal to distal stomach and are frequently asymmetric between the anterior and posterior sides of the stomach.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G765-G782"},"PeriodicalIF":3.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11684892/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142071832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Exercise training ameliorates carbon tetrachloride-induced liver fibrosis and anxiety-like behaviors.","authors":"Yuki Tomiga, Kenichi Tanaka, Joji Kusuyama, Akiko Takano, Yasuki Higaki, Keizo Anzai, Hirokazu Takahashi","doi":"10.1152/ajpgi.00161.2024","DOIUrl":"10.1152/ajpgi.00161.2024","url":null,"abstract":"<p><p>Chronic liver diseases and cirrhosis are associated with mood disorders. Regular exercise has various beneficial effects on multiple organs, including the liver and brain. However, the therapeutic effect of exercise on liver fibrosis concomitant with anxiety has not been evaluated. In this study, the effects of exercise training on liver fibrosis-related anxiety-like behaviors were evaluated. Male C57/BL6 mice were divided into four groups: vehicle-sedentary, vehicle-exercise, carbon tetrachloride (CCl<sub>4</sub>)-sedentary, and CCl<sub>4</sub>-exercise. Liver fibrosis was induced by CCl<sub>4</sub> administration for 8 wk, exercise was applied in the form of voluntary wheel running. After an intervention, anxiety-like behavior was assessed using the elevated plus maze. CCl<sub>4</sub> increased liver and serum fibrotic markers, as measured by blood analysis, histochemistry, and qRT-PCR, and these changes were attenuated by exercise training. CCl<sub>4</sub> induced anxiety-like behavior, and the anxiolytic effects of exercise occurred in both healthy and liver-fibrotic mice. In the hippocampus, CCl<sub>4</sub>-induced changes in neuronal nitric oxide synthase (nNOS) were reversed by exercise, and exercise enhanced brain-derived neurotrophic factor (BDNF) induction, even in a state of severe liver fibrosis. These results suggested that hepatic fibrosis-related anxiety-like behaviors may be induced by excess hippocampal nNOS, and the beneficial effects of exercise could be mediated by increases in BDNF and reductions in nNOS. The percentage of fibrotic area was negatively correlated with antianxiety behavior and positively associated with hippocampal nNOS protein levels. Liver fibrosis-related anxiety-like behaviors could be alleviated through the regulation of hippocampal BDNF and nNOS via exercise training. These results support the therapeutic value of exercise by targeting the mechanisms underlying liver fibrosis and associated anxiety.<b>NEW & NOTEWORTHY</b> This study explores how exercise affects liver fibrosis-related anxiety in mice. Researchers found that regular exercise reversed carbon tetrachloride (CCl<sub>4</sub>)-induced liver fibrosis and reduced anxiety, even in mice with liver fibrosis. Exercise increased brain-derived neurotrophic factor (BDNF) and decreased neuronal nitric oxide synthase (nNOS) in the hippocampus. These findings suggest that exercise has therapeutic potential for treating anxiety associated with chronic liver disease by modulating specific brain factors.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G850-G860"},"PeriodicalIF":3.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Gallbladder mucoceles in dogs: a novel form of acquired CFTR dysfunction causing localized cystic fibrosis-like disease.","authors":"David K Meyerholz, David A Stoltz","doi":"10.1152/ajpgi.00302.2024","DOIUrl":"10.1152/ajpgi.00302.2024","url":null,"abstract":"","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G847-G849"},"PeriodicalIF":3.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11684883/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}