American journal of physiology. Gastrointestinal and liver physiology最新文献

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Diet-microbiome-ENS connection: impact of the cafeteria diet. 饮食-微生物群-生态系统的联系:自助餐厅饮食的影响。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-01-28 DOI: 10.1152/ajpgi.00391.2024
Arun Balasubramaniam, Shanthi Srinivasan
{"title":"Diet-microbiome-ENS connection: impact of the cafeteria diet.","authors":"Arun Balasubramaniam, Shanthi Srinivasan","doi":"10.1152/ajpgi.00391.2024","DOIUrl":"10.1152/ajpgi.00391.2024","url":null,"abstract":"","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G179-G181"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143051370","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}
引用次数: 0
Prenatal lipopolysaccharide stimulation modulates gastrointestinal immunity and oxidative status in weaned pigs. 产前脂多糖刺激调节断奶仔猪胃肠道免疫和氧化状态。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-01-24 DOI: 10.1152/ajpgi.00268.2024
Ty M Mitchell, Nicole C Burdick Sanchez, Jeff A Carroll, Paul R Broadway, Jerrad F Legako, Brooke M Bowen, Amy L Petry
{"title":"Prenatal lipopolysaccharide stimulation modulates gastrointestinal immunity and oxidative status in weaned pigs.","authors":"Ty M Mitchell, Nicole C Burdick Sanchez, Jeff A Carroll, Paul R Broadway, Jerrad F Legako, Brooke M Bowen, Amy L Petry","doi":"10.1152/ajpgi.00268.2024","DOIUrl":"10.1152/ajpgi.00268.2024","url":null,"abstract":"<p><p>Gastrointestinal immunity and antioxidant defenses may be bolstered in young animals through prenatal immune stimulation (PIS), but this is largely uninvestigated in swine. This study tested the hypothesis that PIS could regulate offspring's gastrointestinal immune response and oxidative stress profile. To this end, a PIS model was utilized in sows, delivering low-dose lipopolysaccharide (LPS) during the final third of gestation to target the developing immune system. On day 78 ± 1.8 of gestation, 14 Camborough sows (parity = 2.6 ± 1.4) received either saline (Control, CON) or LPS from <i>Escherichia coli</i> O111:B4 (2.5 µg/kg of body wt). A subset of 34 weaned barrows (<i>n</i> = 17 CON, PIS), weaned at 21 ± 1.3 days, were anesthetized for subcutaneous temperature loggers and jugular catheter placement. Following recovery, all pigs received an intravenous injection of LPS (10 µg/kg·body wt) from <i>E. coli</i> O111:B4. Our findings demonstrate that PIS enhances the gut immune response by upregulating key inflammatory cytokines, indicative of a proinflammatory profile. Consistently across the jejunum and ileum, stem cell factor was modulated with heightened expression in PIS than CON (<i>P</i> ≤ 0.05). In the ileum alone, PIS exhibited heightened expression of proinflammatory cytokines and chemokines, including TNFα, IL-6, IL-1β, and CCL3L1, compared with CON (<i>P</i> ≤ 0.05). Exposure to PIS resulted in reduced systemic total antioxidant capacity at <i>hours 2</i> and <i>4</i> postchallenge (<i>P</i> = 0.004). Piglets exposed to PIS had decreased jejunal tissue malondialdehyde concentrations (<i>P</i> = 0.049). Together, these data indicate that exposure to PIS alters the inflammatory profile of the gastrointestinal immune response and oxidative status in weaned pigs.<b>NEW & NOTEWORTHY</b> These studies represent novel investigations into the influence of prenatal immune stimulation (PIS) in swine on the gastrointestinal immune response and oxidative status of offspring following subsequent immune challenge. Notable alterations were observed in gut protein biomarkers, particularly the upregulation of proinflammatory cytokines TNFα, IL-6, and IL-1β in PIS-exposed pigs, but has variable effects on oxidative status. Altered intestinal immune development may contribute to an increased risk for inflammatory disease associated with prenatal immune stimulation.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G197-G205"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031841","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}
引用次数: 0
Carbon monoxide produced by HO-1 upregulation is the main factor behind the abnormal motility seen in experimental ulcerative colitis in mice. 由HO-1上调产生的一氧化碳是实验性溃疡性结肠炎小鼠运动异常的主要因素。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-02-10 DOI: 10.1152/ajpgi.00179.2023
Mengchao Zhao, Yaru Lei, Mengyuan Wang, Yixin Chen, Shaozhang Hou, Xinyuan Dai, Di Gao, Yudan Liu, Bruno Mazet, Lei Sha
{"title":"Carbon monoxide produced by HO-1 upregulation is the main factor behind the abnormal motility seen in experimental ulcerative colitis in mice.","authors":"Mengchao Zhao, Yaru Lei, Mengyuan Wang, Yixin Chen, Shaozhang Hou, Xinyuan Dai, Di Gao, Yudan Liu, Bruno Mazet, Lei Sha","doi":"10.1152/ajpgi.00179.2023","DOIUrl":"10.1152/ajpgi.00179.2023","url":null,"abstract":"<p><p>The colonic motility is altered in patients with ulcerative colitis (UC), but the mechanism is not clear. Carbon monoxide (CO) is the molecule regulating the resting membrane potential (RMP) gradient across colonic smooth muscle wall. Changes in RMP will affect the contractility of smooth muscle. In this study, we investigated the altered colonic motility in dextran sodium sulfate-induced UC mice and the role of CO. The results showed that in the UC group, the frequency of spontaneous colonic contractions was increased while the AUC was decreased compared with the control group. HO-1-, but not HO-2-, positive cells were increased in the colonic smooth muscle wall of the UC group. These HO-1-positive cells were mainly in the myenteric plexus and PGP9.5 positive, suggesting neuronal overproduction of CO. The RMP of circular smooth muscle cells (SMCs) in the colon of UC group was hyperpolarized compared with that of control group. In control group, application of CORM-3, a CO donor, altered colonic spontaneous contractions by increasing their frequency and decreasing amplitude. In the UC group, ZnPPIX, a HO-1 inhibitor, reduced the frequency and increased the amplitude. CORM-3 hyperpolarized the RMP of colonic SMCs and abolished its gradient in the control group, while ZnPPIX depolarized the RMP of colonic SMCs and restored its gradient in the UC group. CO produced by HO-1 upregulation is the main factor behind the altered colonic motility seen in UC mice. CO is a potential candidate as a therapeutic target for patients with UC who suffer from abnormal colonic motility.<b>NEW & NOTEWORTHY</b> Carbon monoxide (CO) produced by HO-1 upregulation in myenteric plexus is the main factor that abolishes the RMP gradient across colonic muscle wall causing the altered colonic motility seen in experimental ulcerative colitis (UC) mice. CO is a potential candidate as a therapeutic target for patients with UC who suffer from abnormal colonic motility.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G311-G322"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381562","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}
引用次数: 0
A menu for microbes: unraveling appetite regulation and weight dynamics through the microbiota-brain connection across the lifespan. 微生物的菜单:通过微生物-大脑在整个生命周期中的联系揭示食欲调节和体重动态。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-01-15 DOI: 10.1152/ajpgi.00227.2024
Gabriela Ribeiro, Harriët Schellekens, Cristina Cuesta-Marti, Ivie Maneschy, Shámila Ismael, Amanda Cuevas-Sierra, J Alfredo Martínez, Marta P Silvestre, Cláudia Marques, André Moreira-Rosário, Ana Faria, Luis A Moreno, Conceição Calhau
{"title":"A menu for microbes: unraveling appetite regulation and weight dynamics through the microbiota-brain connection across the lifespan.","authors":"Gabriela Ribeiro, Harriët Schellekens, Cristina Cuesta-Marti, Ivie Maneschy, Shámila Ismael, Amanda Cuevas-Sierra, J Alfredo Martínez, Marta P Silvestre, Cláudia Marques, André Moreira-Rosário, Ana Faria, Luis A Moreno, Conceição Calhau","doi":"10.1152/ajpgi.00227.2024","DOIUrl":"10.1152/ajpgi.00227.2024","url":null,"abstract":"<p><p>Appetite, as the internal drive for food intake, is often dysregulated in a broad spectrum of conditions associated with over- and under-nutrition across the lifespan. Appetite regulation is a complex, integrative process comprising psychological and behavioral events, peripheral and metabolic inputs, and central neurotransmitter and metabolic interactions. The microbiota-gut-brain axis has emerged as a critical mediator of multiple physiological processes, including energy metabolism, brain function, and behavior. Therefore, the role of the microbiota-gut-brain axis in appetite and obesity is receiving increased attention. Omics approaches such as genomics, epigenomics, transcriptomics, proteomics, and metabolomics in appetite and weight regulation offer new opportunities for featuring obesity phenotypes. Furthermore, gut-microbiota-targeted approaches such as pre-, pro-, post-, and synbiotic, personalized nutrition, and fecal microbiota transplantation are novel avenues for precision treatments. The aim of this narrative review is <i>1</i>) to provide an overview of the role of the microbiota-gut-brain axis in appetite regulation across the lifespan and <i>2</i>) to discuss the potential of omics and gut microbiota-targeted approaches to deepen understanding of appetite regulation and obesity.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G206-G228"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142982495","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}
引用次数: 0
Dysregulated hepatic alcohol metabolism: a key factor involved in the pathogenesis of alcohol-associated liver disease. 肝脏酒精代谢失调:酒精相关性肝病发病的关键因素
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-02-05 DOI: 10.1152/ajpgi.00394.2024
Mukund Srinivasan, Sumedha Kota, Kamlesh Bhopale, Anna Caracheo, Lata Kaphalia, Jennifer Linares, Trevor Romsdahl, William Russell, Vsevolod Popov, Paul Boor, Bhupendra Kaphalia
{"title":"Dysregulated hepatic alcohol metabolism: a key factor involved in the pathogenesis of alcohol-associated liver disease.","authors":"Mukund Srinivasan, Sumedha Kota, Kamlesh Bhopale, Anna Caracheo, Lata Kaphalia, Jennifer Linares, Trevor Romsdahl, William Russell, Vsevolod Popov, Paul Boor, Bhupendra Kaphalia","doi":"10.1152/ajpgi.00394.2024","DOIUrl":"10.1152/ajpgi.00394.2024","url":null,"abstract":"<p><p>Alcohol use disorder is a major risk factor for alcohol-associated liver disease (ALD), characterized by reduced hepatic alcohol dehydrogenase (ADH) activity, increased body burden of alcohol, and its nonoxidative metabolism to fatty acid ethyl esters (FAEEs). However, the mechanism(s) underlying ALD remain unclear. This study investigated the metabolic basis and mechanism(s) of ALD in chronic ethanol (EtOH)-fed hepatic ADH1-deficient (ADH<sup>-</sup>) deer mice administered with a single dose of binge EtOH with/without FAEEs. Hepatic ADH<sup>-</sup> and ADH normal (ADH<sup>+</sup>) deer mice fed chronic EtOH daily for 3 mo, followed by a single dose of binge EtOH (3 g/kg·body wt) with/without FAEEs (100 mg/kg·body wt), 1 wk before euthanasia. Blood alcohol and acetaldehyde and liver injury markers in the plasma, hepatic FAEEs, lipids, and inflammatory markers were analyzed. Hepatic histology, ultrastructure, protein/mRNA expression of genes involved in alcohol metabolism and lipogenesis, cyclic adenosine monophosphate (cAMP), phosphodiesterase (PDE) activity, and AMP-activated protein kinase (AMPKα) signaling were assessed. Blood alcohol, hepatic lipids and FAEEs, inflammation, oxidative stress, and the expression of lipogenic proteins/genes were significantly increased in various chronic EtOH-fed groups of ADH<sup>-</sup> versus ADH<sup>+</sup> deer mice. In addition, hepatic cAMP levels were reduced, whereas PDE activity and plasma transaminases were elevated. Binge EtOH with/without FAEEs did not significantly exacerbate the liver injury in chronic EtOH-fed ADH<sup>-</sup> as well as ADH<sup>+</sup> deer mice. Overall, an increased body burden of EtOH and endogenously formed FAEEs due to hepatic ADH deficiency, along with dysregulated cAMP and AMPKα signaling, could be the determining factors for EtOH-induced liver injury leading to ALD.<b>NEW & NOTEWORTHY</b> Using hepatic alcohol dehydrogenase deficient (ADH<sup>-</sup>) deer mouse, which mimics the metabolic conditions observed in chronic alcoholics, we found significant hepatic injury along with degenerative changes in endoplasmic reticulum and mitochondria. Our findings suggest that an increased nonoxidative alcohol metabolism under hepatic alcohol dehydrogenase deficiency and associated hepatic lipid dysregulation and injury appear to be the key factors involved in the pathogenesis of alcohol-associated liver disease.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G289-G308"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143188204","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}
引用次数: 0
Modeling the kinetics of interorgan arginine metabolism during bacterial sepsis in swine. 猪细菌性败血症过程中器官间精氨酸代谢动力学的建模。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-01-29 DOI: 10.1152/ajpgi.00375.2024
Caitlin Vonderohe, Douglas Burrin
{"title":"Modeling the kinetics of interorgan arginine metabolism during bacterial sepsis in swine.","authors":"Caitlin Vonderohe, Douglas Burrin","doi":"10.1152/ajpgi.00375.2024","DOIUrl":"10.1152/ajpgi.00375.2024","url":null,"abstract":"","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G309-G310"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143063132","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}
引用次数: 0
Voltage-gated calcium channel α2δ-1 subunit is involved in the regulation of glucose-stimulated GLP-1 secretion in mice. 电压门控钙通道α2δ-1亚基参与小鼠葡萄糖刺激GLP-1分泌的调控。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-02-07 DOI: 10.1152/ajpgi.00279.2024
Yuhan Yang, Shunsuke Yamane, Norio Harada, Eri Ikeguchi-Ogura, Kana Yamamoto, Naoki Wada, Muhammad Fauzi, Takaaki Murakami, Daisuke Yabe, Yoshitaka Hayashi, Nobuya Inagaki
{"title":"Voltage-gated calcium channel α<sub>2</sub>δ-1 subunit is involved in the regulation of glucose-stimulated GLP-1 secretion in mice.","authors":"Yuhan Yang, Shunsuke Yamane, Norio Harada, Eri Ikeguchi-Ogura, Kana Yamamoto, Naoki Wada, Muhammad Fauzi, Takaaki Murakami, Daisuke Yabe, Yoshitaka Hayashi, Nobuya Inagaki","doi":"10.1152/ajpgi.00279.2024","DOIUrl":"10.1152/ajpgi.00279.2024","url":null,"abstract":"<p><p>Glucagon-like peptide-1 (GLP-1) is an incretin produced by enteroendocrine preproglucagon (PPG)-expressing cells in response to nutrient ingestion that potentiates insulin secretion. The voltage-gated Ca<sup>2+</sup> channel has been reported previously to be involved in glucose-stimulated GLP-1 secretion; in this study, we show that PPG-cells in upper and lower small intestine substantially express the voltage-gated Ca<sup>2+</sup> channel α<sub>2</sub>δ-1 subunit (Ca<sub>V</sub>α<sub>2</sub>δ-1). In vitro experiments using NCI-H716 cells demonstrate that inhibition of Ca<sub>V</sub>α<sub>2</sub>δ-1 by gabapentin (GBP), an inhibitory ligand of the α<sub>2</sub>δ subunit, attenuates glucose-stimulated intracellular calcium elevation and reduces GLP-1 secretion. In addition, systemic administration of gabapentin significantly reduces glucose-stimulated GLP-1 secretion without affecting blood glucose levels in wild-type mice. Furthermore, knockout mice of intestine-specific <i>Cacna2d1</i>, a gene encoding Ca<sub>V</sub>α<sub>2</sub>δ-1, exhibit reduced GLP-1 secretion in response to oral glucose administration regardless of sex. These results demonstrate that Ca<sub>V</sub>α<sub>2</sub>δ-1 expressed in PPG-cells plays an important role in glucose-stimulated GLP-1 secretion and represents a potential target in the treatment of diabetes and obesity.<b>NEW & NOTEWORTHY</b> In this study, we establish high expression of the voltage-gated Ca<sup>2+</sup> channel α<sub>2</sub>δ-1 subunit (Ca<sub>V</sub>α<sub>2</sub>δ-1) subunit in enteroendocrine glucagon-like peptide-1 (GLP-1) producing cells and elucidate its role in GLP-1 secretion, providing a more detailed understanding of the mechanism of GLP-1 secretion.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G243-G251"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143363192","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}
引用次数: 0
The central neural control of the posterior belly of the digastric muscles during swallowing in rats. 大鼠吞咽过程中二腹肌后腹的中枢神经控制。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-02-05 DOI: 10.1152/ajpgi.00374.2024
Yuhei Tsutsui, Titi Chotirungsan, Charng-Rong Pan, Satomi Kawada, Jin Magara, Takanori Tsujimura, Keiichiro Okamoto, Makoto Inoue
{"title":"The central neural control of the posterior belly of the digastric muscles during swallowing in rats.","authors":"Yuhei Tsutsui, Titi Chotirungsan, Charng-Rong Pan, Satomi Kawada, Jin Magara, Takanori Tsujimura, Keiichiro Okamoto, Makoto Inoue","doi":"10.1152/ajpgi.00374.2024","DOIUrl":"10.1152/ajpgi.00374.2024","url":null,"abstract":"<p><p>The aim of this study was to clarify whether the posterior belly of the digastric (post-Dig) muscle is activated during the swallowing reflex and whether the post-Dig muscle is directly controlled by the swallowing central pattern generator (CPG) in anesthetized rats, using physiological and immunohistochemical approaches. In physiological study, electromyograms (EMGs) of the post-Dig, sternohyoid and thyrohyoid muscles, and the diaphragm were recorded during respiration and swallowing with and without airway stenosis. In the immunohistochemical study, c-Fos immunoreactivity for expression of cells during swallowing was analyzed. Motoneurons were identified using immunohistochemistry with Fluoro-gold (FG). EMG bursts were observed in the hyoid muscles during the inspiratory phase and swallowing. With airway stenosis, the swallowing EMG activity was facilitated in terms of duration and area only in the post-Dig muscle. The coordination of these EMG activities during swallowing was maintained with airway stenosis. In contrast, the offset of the post-Dig EMG burst was delayed with airway stenosis. c-Fos-positive cells were observed in the accessory facial nucleus (Acs7), but only in the rostral portion. FG-labeled cells were observed in Acs7. Several c-Fos/FG double-labeled cells were observed only in the rostral Acs7. These results suggested that the post-Dig muscle is activated during swallowing, the activation of which is controlled by the swallowing CPG, and that the distribution of Acs7 neurons, which innervate the post-Dig muscle, was uneven in the nucleus. In addition, the modulation of post-Dig muscle activity during inspiration might be due to changes in peripheral conditions via respiratory CPG.<b>NEW & NOTEWORTHY</b> The posterior belly of the digastric muscle is activated during the inspiratory phase and swallowing. Increased airway resistance facilitates both inspiratory and swallowing activities of this muscle. Immunohistochemistry revealed that the motoneurons innervating the posterior belly of the digastric muscle were activated during swallowing only in the rostral portion of the accessory facial nucleus. These results suggested that the posterior belly of the digastric muscle is controlled by the respiratory and swallowing central pattern generators.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G277-G288"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143188205","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}
引用次数: 0
Regulation of pathologic fibroblast functions in digestive diseases: a role for hypoxia? 消化系统疾病病理成纤维细胞功能的调节:缺氧的作用?
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2025-01-28 DOI: 10.1152/ajpgi.00277.2024
Cian M Ohlendieck, Carlos Matellan, Mario C Manresa
{"title":"Regulation of pathologic fibroblast functions in digestive diseases: a role for hypoxia?","authors":"Cian M Ohlendieck, Carlos Matellan, Mario C Manresa","doi":"10.1152/ajpgi.00277.2024","DOIUrl":"10.1152/ajpgi.00277.2024","url":null,"abstract":"<p><p>The recent uncovering of fibroblast heterogeneity has given great insight into the versatility of the stroma. Among other cellular processes, fibroblasts are now thought to contribute to the coordination of immune responses in a range of chronic inflammatory diseases and cancer. Although the pathologic roles of myofibroblasts, inflammatory fibroblasts, and cancer-associated fibroblasts in disease are reasonably well understood, the mechanisms behind their activation remain to be uncovered. In the gastrointestinal (GI) tract, several interleukins and tumor necrosis factor superfamily members have been identified as possible mediators driving the acquisition of inflammatory and fibrotic properties in fibroblasts. In addition to cytokines, other microenvironmental factors such as nutrient and oxygen availability are likely contributors to this process. In this respect, the phenomenon of low cellular oxygen levels known as hypoxia is common in a plethora of GI diseases. Indeed, the cross talk between hypoxia and inflammation is well-documented, with an abundance of studies suggesting that oxygen-sensing enzymes may have regulatory effects on inflammatory signaling pathways such as NF-κB. However, the impact that this has in GI fibroblasts in the context of chronic diseases has not been fully uncovered. Here we discuss the role of fibroblasts in GI diseases, the mediators that have emerged as regulators of their functions and the potential impact of hypoxia in this process, highlighting areas that require further investigation.</p>","PeriodicalId":7725,"journal":{"name":"American journal of physiology. Gastrointestinal and liver physiology","volume":" ","pages":"G229-G242"},"PeriodicalIF":3.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143051374","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}
引用次数: 0
Intestinal organoid coculture systems: current approaches, challenges, and future directions. 肠道类器官共培养系统:目前的方法、挑战和未来的方向。
IF 3.9 3区 医学
American journal of physiology. Gastrointestinal and liver physiology Pub Date : 2025-03-01 Epub Date: 2024-12-23 DOI: 10.1152/ajpgi.00203.2024
Ghanyah Al-Qadami, Anita Raposo, Chia-Chi Chien, Chenkai Ma, Ilka Priebe, Maryam Hor, Kim Fung
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