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Wang X, Chen D, Guo M, Ning Y, Geng M, Guo J, Gao J, Zhao D, Zhang Y, Li Q, Li L, Li S, Li Y, Xie X, Zuo X, Li J. Oxytocin Alleviates Colitis and Colitis-Associated Colorectal Tumorigenesis via Noncanonical Fucosylation. RESEARCH (WASHINGTON, D.C.) 2024; 7:0407. [PMID: 38979515 PMCID: PMC11228076 DOI: 10.34133/research.0407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 05/22/2024] [Indexed: 07/10/2024]
Abstract
Colon cancer is increasing worldwide and is commonly regarded as hormone independent, yet recent reports have implicated sex hormones in its development. Nevertheless, the role of hormones from the hypothalamus-hypophysis axis in colitis-associated colorectal cancer (CAC) remains uncertain. In this study, we observed a significant reduction in the expression of the oxytocin receptor (OXTR) in colon samples from both patient with colitis and patient with CAC. To investigate further, we generated mice with an intestinal-epithelium-cell-specific knockout of OXTR. These mice exhibited markedly increased susceptibility to dextran-sulfate-sodium-induced colitis and dextran sulfate sodium/azoxymethane-induced CAC compared to wild-type mice. Our findings indicate that OXTR depletion impaired the inner mucus of the colon epithelium. Mechanistically, oxytocin was found to regulate Mucin 2 maturation through β1-3-N-acetylglucosaminyltransferase 7 (B3GNT7)-mediated fucosylation. Interestingly, we observed a positive correlation between B3GNT7 expression and OXTR expression in human colitis and CAC colon samples. Moreover, the simultaneous activations of OXTR and fucosylation by l-fucose significantly alleviated tumor burden. Hence, our study unveils oxytocin's promising potential as an affordable and effective therapeutic intervention for individuals affected by colitis and CAC.
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Affiliation(s)
- Xia Wang
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Dawei Chen
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine,
Shandong University, Jinan, Shandong 250012, China
| | - Mengnan Guo
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine,
Shandong University, Jinan, Shandong 250012, China
| | - Yao Ning
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine,
Shandong University, Jinan, Shandong 250012, China
| | - Mingze Geng
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine,
Shandong University, Jinan, Shandong 250012, China
| | - Jing Guo
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Jiahui Gao
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Dong Zhao
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Yupeng Zhang
- Department of Molecular Plant Biology,
Norwegian Institute of Bioeconomy Research, Ås 1430, Norway
| | - Qianpeng Li
- Department of Hematology,
Weifang People’s Hospital, Weifang, Shandong 261000, China
| | - Lixiang Li
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Shiyang Li
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
- Advanced Medical Research Institute,
Shandong University, Jinan, Shandong 250012, China
| | - Yanqing Li
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Xiaoran Xie
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Xiuli Zuo
- Department of Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Laboratory of Translational Gastroenterology,
Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
- Shandong Provincial Clinical Research Center for Digestive Disease, Jinan, Shandong 250012, China
| | - Jingxin Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine,
Shandong University, Jinan, Shandong 250012, China
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Li S, Shi Y, Zhu J, Li J, Wang S, Liu C. Protective effect of oxytocin on vincristine-induced gastrointestinal dysmotility in mice. Front Pharmacol 2024; 15:1270612. [PMID: 38655179 PMCID: PMC11037254 DOI: 10.3389/fphar.2024.1270612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 02/26/2024] [Indexed: 04/26/2024] Open
Abstract
Aims: Vincristine (VCR), an antineoplastic drug, induces peripheral neuropathy characterized by nerve damage, limiting its use and reducing the quality of life of patients. VCR causes myenteric neuron damage, inhibits gastrointestinal motility, and results in constipation or paralytic ileus in patients. Oxytocin (OT) is an endogenous neuropeptide produced by the enteric nerve system, which regulates gastrointestinal motility and exerts neuroprotective effects. This study aimed to investigate whether OT can improve VCR-induced gastrointestinal dysmotility and evaluate the underlying mechanism. Methods: Mice were injected either with saline or VCR (0.1 mg/kg/d, i. p.) for 14 days, and OT (0.1 mg/kg/d, i.p.) was applied 1 h before each VCR injection. Gastrointestinal transit and the contractile activity of the isolated colonic segments were assessed. The concentration of OT in plasma was measured using ELISA. Immunofluorescence staining was performed to analyze myenteric neurons and reactive oxygen species (ROS) levels. Furthermore, the indicators of oxidative stress were detected. The protein expressions of Nrf2, ERK1/2, P-ERK1/2, p38, and P-p38 in the colon were tested using Western blot. Results: VCR reduced gastrointestinal transit and the responses of isolated colonic segments to electrical field stimulation and decreased the amount of neurons. Furthermore, VCR reduced neuronal nitric oxide synthase and choline acetyltransferase immunopositive neurons in the colonic myenteric nerve plexus. VCR increased the concentration of OT in plasma. Exogenous OT pretreatment ameliorated the inhibition of gastrointestinal motility and the injury of myenteric neurons caused by VCR. OT pretreatment also prevented the decrease of superoxide dismutase activity, glutathione content, total antioxidative capacity, and Nrf2 expression, the increase of ROS levels, and the phosphorylation of ERK1/2 and p38 MAPK following VCR treatment. Conclusion: Our results suggest that OT pretreatment can protect enteric neurons from VCR-induced injury by inhibiting oxidative stress and MAPK pathways (ERK1/2, p38). This may be the underlying mechanism by which it alleviates gastrointestinal dysmotility.
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Affiliation(s)
- Shuang Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, China
| | - Yao Shi
- Ministry of Education Key Laboratory of Protein, School of Life Sciences, Tsinghua University, Beijing, China
| | - Jianchun Zhu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, China
| | - Jingxin Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, China
| | - Shuanglian Wang
- Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Chuanyong Liu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, Jinan, China
- Provincial Key Lab of Mental Disorders, Shandong University, Jinan, China
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Buemann B. Does activation of oxytocinergic reward circuits postpone the decline of the aging brain? Front Psychol 2023; 14:1250745. [PMID: 38222845 PMCID: PMC10786160 DOI: 10.3389/fpsyg.2023.1250745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/20/2023] [Indexed: 01/16/2024] Open
Abstract
Oxytocin supports reproduction by promoting sexual- and nursing behavior. Moreover, it stimulates reproductive organs by different avenues. Oxytocin is released to the blood from terminals of oxytocinergic neurons which project from the hypothalamus to the pituitary gland. Concomitantly, the dendrites of these neurons discharge oxytocin into neighboring areas of the hypothalamus. At this location it affects other neuroendocrine systems by autocrine and paracrine mechanisms. Moreover, sensory processing, affective functions, and reward circuits are influenced by oxytocinergic neurons that reach different sites in the brain. In addition to its facilitating impact on various aspects of reproduction, oxytocin is revealed to possess significant anti-inflammatory, restoring, and tranquilizing properties. This has been demonstrated both in many in-vivo and in-vitro studies. The oxytocin system may therefore have the capacity to alleviate detrimental physiological- and mental stress reactions. Thus, high levels of endogenous oxytocin may counteract inadequate inflammation and malfunctioning of neurons and supportive cells in the brain. A persistent low-grade inflammation increasing with age-referred to as inflammaging-may lead to a cognitive decline but may also predispose to neurodegenerative diseases such as Alzheimer's and Parkinson. Interestingly, animal studies indicate that age-related destructive processes in the body can be postponed by techniques that preserve immune- and stem cell functions in the hypothalamus. It is argued in this article that sexual activity-by its stimulating impact on the oxytocinergic activity in many regions of the brain-has the capacity to delay the onset of age-related cerebral decay. This may also postpone frailty and age-associated diseases in the body. Finally, oxytocin possesses neuroplastic properties that may be applied to expand sexual reward. The release of oxytocin may therefore be further potentiated by learning processes that involves oxytocin itself. It may therefore be profitable to raise the consciousness about the potential health benefits of sexual activity particularly among the seniors.
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Jalil AT, Hassan NF, Abdulameer SJ, Farhan ZM, Suleiman AA, Al-Azzawi AK, Zabibah R, Fadhil A. Phosphatidylinositol 3-kinase signaling pathway and inflammatory bowel disease: Current status and future prospects. Fundam Clin Pharmacol 2023; 37:910-917. [PMID: 36939850 DOI: 10.1111/fcp.12894] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 03/01/2023] [Accepted: 03/17/2023] [Indexed: 03/21/2023]
Abstract
Inflammatory bowel disease (IBD) is a chronic life-limiting disease of gastrointestinal tract characterized by widespread enteric inflammation. IBD is a multifactorial disease, and different environmental, microbial, and immune-related factors give rise to the development of disease. Among several factors, the preponderance of pro-inflammatory T helper 17 cells over the anti-inflammatory regulatory T cells augments inflammation in the intestinal mucosa. Prevailing evidence accentuates that PI3K signaling pathway plays a central role in the pathophysiology of the condition by regulating the inflammatory process in the gut mucosa. By recognizing the implications of PI3K in the pathogenesis of IBD, agents that could modulate this pathway have recently been at the focus of research, yielding encouraging results mainly in the experimental IBD models. In this review, we have summarized the recent advances, which may hold the keys to identify novel therapeutic strategies for IBD.
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Affiliation(s)
| | - Neeran Flaeh Hassan
- Department of Clinical and Laboratory Sciences, College of Pharmacy, University of Al-Qadisiyah, Al-Diwaniyah, Iraq
| | - Sada Jasim Abdulameer
- Department of Biology, College of Education for Pure Sciences, Wasit University, Kut, Iraq
| | - Zainab Mohammed Farhan
- Department of Medical Laboratory Sciences, National University of Science and Technology, Dhi Qar, Iraq
| | | | | | - Rahman Zabibah
- Department of Medical Laboratory Sciences, College of Medical Technology, The Islamic University, Najaf, Iraq
| | - Ali Fadhil
- College of Medical Technology, Al-Farahidi University, Baghdad, Iraq
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Casali CI, Pescio LG, Sendyk DE, Erjavec LC, Morel Gómez E, Parra LG, Fernández-Tomé MC. Dynamics of differentiated-renal epithelial cell monolayer after calcium oxalate injury: The role of cyclooxygenase-2. Life Sci 2023; 319:121544. [PMID: 36871933 DOI: 10.1016/j.lfs.2023.121544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/17/2023] [Accepted: 02/27/2023] [Indexed: 03/07/2023]
Abstract
AIMS Calcium oxalate (Oxa), constituent of most common kidney stones, damages renal tubular epithelial cells leading to kidney disease. Most in vitro studies designed to evaluate how Oxa exerts its harmful effects were performed in proliferative or confluent non-differentiated renal epithelial cultures; none of them considered physiological hyperosmolarity of renal medullary interstitium. Cyclooxygenase 2 (COX2) has been associated to Oxa deleterious actions; however, up to now, it is not clear how COX2 acts. In this work, we proposed an in vitro experimental system resembling renal differentiated-epithelial cells that compose medullary tubular structures which were grown and maintained in a physiological hyperosmolar environment and evaluated whether COX2 → PGE2 axis (COX2 considered a cytoprotective protein for renal cells) induces Oxa damage or epithelial restitution. MAIN METHODS MDCK cells were differentiated with NaCl hyperosmolar medium for 72 h where cells acquired the typical apical and basolateral membrane domains and a primary cilium. Then, cultures were treated with 1.5 mM Oxa for 24, 48, and 72 h to evaluate epithelial monolayer restitution dynamics and COX2-PGE2 effect. KEY FINDINGS Oxa completely turned the differentiated phenotype into mesenchymal one (epithelial-mesenchymal transition). Such effect was partially and totally reverted after 48 and 72 h, respectively. Oxa damage was even deeper when COX2 was blocked by NS398. PGE2 addition restituted the differentiated-epithelial phenotype in a time and concentration dependence. SIGNIFICANCE This work presents an experimental system that approaches in vitro to in vivo renal epithelial studies and, more important, warns about NSAIDS use in patients suffering from kidney stones.
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Affiliation(s)
- Cecilia I Casali
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Ciencias Biológicas, Cátedra de Biología Celular y Molecular, Buenos Aires, Argentina; Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini (IQUIFIB)-Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Lucila G Pescio
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Ciencias Biológicas, Cátedra de Biología Celular y Molecular, Buenos Aires, Argentina; Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini (IQUIFIB)-Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Dylan E Sendyk
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Ciencias Biológicas, Cátedra de Biología Celular y Molecular, Buenos Aires, Argentina.
| | - Luciana C Erjavec
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Ciencias Biológicas, Cátedra de Biología Celular y Molecular, Buenos Aires, Argentina; Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini (IQUIFIB)-Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Emanuel Morel Gómez
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Ciencias Biológicas, Cátedra de Biología Celular y Molecular, Buenos Aires, Argentina.
| | - Leandro G Parra
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Ciencias Biológicas, Cátedra de Biología Celular y Molecular, Buenos Aires, Argentina; Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini (IQUIFIB)-Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - María C Fernández-Tomé
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Ciencias Biológicas, Cátedra de Biología Celular y Molecular, Buenos Aires, Argentina; Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini (IQUIFIB)-Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
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Chronic GPER activation prompted the proliferation of ileal stem cell in ovariectomized mice depending on Paneth cell-derived Wnt3. Clin Sci (Lond) 2023; 137:109-127. [PMID: 36503938 DOI: 10.1042/cs20220392] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 12/07/2022] [Accepted: 12/09/2022] [Indexed: 12/14/2022]
Abstract
Menopausal women often face long-term estrogen treatment. G protein-coupled estrogen receptor (GPER) expressed in intestinal crypt was activated by estrogen therapy, but it was unclear whether chronic GPER activation during menopause had an effect on intestinal stem cells (ISCs). We tested the effect of chronic GPER activation on ISCs of ovariectomized (OVX) mice by injection of the selective GPER agonist G-1 for 28 days, or G-1 stimulation of organoids derived from crypts of OVX mice. G-1 up-regulated crypt depth, the number of Ki67+, bromodeoxyuridine+ cells and Olfm4+ ISCs, and the expression of ISCs marker genes (Lgr5, Olfm4 and Axin2). G-1 administration promoted organoid growth, increased the number of EdU+ cells per organoid and protein expression of Cyclin D1 and cyclin B1 in organoids. After G-1 treatment in vivo or in vitro, Paneth cell-derived Wnt3, Wnt3 effector β-catenin and Wnt target genes c-Myc and Cyclin D1 increased in ileum or organoids. Once blocking the secretion of Wnt3 from Paneth cells, the effects of G-1 on organoids growth, ISCs marker genes and Wnt/β-catenin signaling were abolished. G-1 did not affect the number of Paneth cells in ex vivo organoids, while activated Mmp7/cryptdin program in Paneth cells, promoted their maturation, and increased the expression of lysozyme protein. G-1 pretreatment in OVX mice inhibited radiation-induced ISCs proliferation injury and enhanced the resistance of mice to intestinal injury. In conclusion, chronic GPER activation prompted the Wnt3 synthesis in Paneth cells, thus increased the proliferation of ISCs via activation of Wnt3/β-catenin signaling in OVX mice.
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Buemann B. Oxytocin Release: A Remedy for Cerebral Inflammaging. Curr Aging Sci 2022; 15:218-228. [PMID: 35431008 DOI: 10.2174/1874609815666220414104832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 12/22/2021] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
Oxytocin facilitates reproduction both by physiological and behavioral mechanisms. Oxytocinergic neurons emerging from the hypothalamus release oxytocin from the pituitary gland to the blood by axonal discharge to regulate reproductive organs. However, at the same time, oxytocin is secreted into neighboring areas of the hypothalamus from the dendrites of these neurons. Here, the peptide acts by autocrine and paracrine mechanisms to influence other neuroendocrine systems. Furthermore, oxytocinergic neurons project to many different locations in the brain, where they affect sensory processing, affective functions, and reward. Additional to its regulatory role, significant anti-inflammatory and restoring effects of oxytocin have been reported from many invivo and in-vitro studies. The pervasive property of the oxytocin system may enable it generally to dampen stress reactions both peripherally and centrally, and protect neurons and supportive cells from inadequate inflammation and malfunctioning. Animal experiments have documented the importance of preserving immune- and stem cell functions in the hypothalamus to impede age-related destructive processes of the body. Sexual reward has a profound stimulating impact on the oxytocinergic activity, and the present article therefore presents the hypothesis that frequent sexual activity and gratigying social experiance may postpone the onset of frailty and age-associated diseases by neural protection from the bursts of oxytocin. Furthermore, suggestions are given how the neuroplastic properties of oxytocin may be utilized to enhance sexual reward by learning processes in order to further reinforce the release of this peptide.
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Affiliation(s)
- Benjamin Buemann
- Retired. Copenhagen, Denmark. Previous Affiliation: Research Department of Human Nutrition, The Royal Veterinary and Agricultural University, Copenhagen, Denmark
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Wang SC, Zhang F, Zhu H, Yang H, Liu Y, Wang P, Parpura V, Wang YF. Potential of Endogenous Oxytocin in Endocrine Treatment and Prevention of COVID-19. Front Endocrinol (Lausanne) 2022; 13:799521. [PMID: 35592777 PMCID: PMC9110836 DOI: 10.3389/fendo.2022.799521] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 03/14/2022] [Indexed: 01/09/2023] Open
Abstract
Coronavirus disease 2019 or COVID-19 caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has become a significant threat to the health of human beings. While wearing mask, maintaining social distance and performing self-quarantine can reduce virus spreading passively, vaccination actively enhances immune defense against COVID-19. However, mutations of SARS-CoV-2 and presence of asymptomatic carriers frustrate the effort of completely conquering COVID-19. A strategy that can reduce the susceptibility and thus prevent COVID-19 while blocking viral invasion and pathogenesis independent of viral antigen stability is highly desirable. In the pathogenesis of COVID-19, endocrine disorders have been implicated. Correspondingly, many hormones have been identified to possess therapeutic potential of treating COVID-19, such as estrogen, melatonin, corticosteroids, thyroid hormone and oxytocin. Among them, oxytocin has the potential of both treatment and prevention of COVID-19. This is based on oxytocin promotion of immune-metabolic homeostasis, suppression of inflammation and pre-existing comorbidities, acceleration of damage repair, and reduction of individuals' susceptibility to pathogen infection. Oxytocin may specifically inactivate SARS-COV-2 spike protein and block viral entry into cells via angiotensin-converting enzyme 2 by suppressing serine protease and increasing interferon levels and number of T-lymphocytes. In addition, oxytocin can promote parasympathetic outflow and the secretion of body fluids that could dilute and even inactivate SARS-CoV-2 on the surface of cornea, oral cavity and gastrointestinal tract. What we need to do now is clinical trials. Such trials should fully balance the advantages and disadvantages of oxytocin application, consider the time- and dose-dependency of oxytocin effects, optimize the dosage form and administration approach, combine oxytocin with inhibitors of SARS-CoV-2 replication, apply specific passive immunization, and timely utilize efficient vaccines. Meanwhile, blocking COVID-19 transmission chain and developing other efficient anti-SARS-CoV-2 drugs are also important. In addition, relative to the complex issues with drug applications over a long term, oxytocin can be mobilized through many physiological stimuli, and thus used as a general prevention measure. In this review, we explore the potential of oxytocin for treatment and prevention of COVID-19 and perhaps other similar pathogens.
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Affiliation(s)
- Stephani C. Wang
- Division of Cardiology, Department of Medicine, University of California-Irvine, Irvine, CA, United States
| | - Fengmin Zhang
- Department of Microbiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, China
| | - Hui Zhu
- Department of Physiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, China
| | - Haipeng Yang
- Neonatal Division of the Department of Pediatrics, Harbin Medical University The Fourth Affiliated Hospital, Harbin, China
| | - Yang Liu
- Department of Physiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, China
| | - Ping Wang
- Department of Genetics, School of Basic Medical Sciences, Harbin Medical University, Harbin, China
| | - Vladimir Parpura
- Department of Neurobiology, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Yu-Feng Wang
- Department of Physiology, School of Basic Medical Sciences, Harbin Medical University, Harbin, China
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Chukwunyere U, Mercan M, Sehirli AO, Abacioglu N. Possible cytoprotective mechanisms of oxytocin against 5-fluorouracil-induced gastrointestinal mucositis. Mol Biol Rep 2022; 49:4055-4059. [PMID: 35474056 DOI: 10.1007/s11033-022-07384-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 11/27/2022]
Abstract
Gastrointestinal mucositis is a common and dose-limiting side effect characterized by ulcerative lesions in the mucosa of the digestive tract in patients receiving anticancer drugs such as 5-fluorouracil (5-FU), a potent antineoplastic drug. Several protocols have reported the efficacy of therapeutic interventions to prevent this side effect, although complete success has not yet been achieved and mucositis remains one of the most serious complications associated with 5-FU therapy. Oxytocin, a well-known antistress agent, has been reported to have comparable effects to ranitidine. Previous studies have shown that oxytocin inhibits gastric acid secretion and the expression of proinflammatory cytokines in rats. If oxytocin can reduce stress-induced ulcers via antioxidant, antiapoptotic, and anti-inflammatory pathways, then it may have a dose-dependent effect on gastrointestinal mucositis caused by 5-FU.
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Affiliation(s)
- Ugochukwu Chukwunyere
- Department of Pharmacology, Faculty of Pharmacy, Near East University, 99138, Lefkosa, TRNC, Turkey.
| | - Merve Mercan
- Department of Pharmacology, Faculty of Pharmacy, Near East University, 99138, Lefkosa, TRNC, Turkey
| | - Ahmet Ozer Sehirli
- Department of Pharmacology, Faculty of Dentistry, Near East University, Lefkosa, TRNC, Turkey
| | - Nurettin Abacioglu
- Department of Pharmacology, Faculty of Pharmacy, Near East University, 99138, Lefkosa, TRNC, Turkey
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Yu Y, Li J, Liu C. Oxytocin suppresses epithelial cell-derived cytokines production and alleviates intestinal inflammation in food allergy. Biochem Pharmacol 2022; 195:114867. [PMID: 34863977 DOI: 10.1016/j.bcp.2021.114867] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/29/2021] [Accepted: 11/30/2021] [Indexed: 12/12/2022]
Abstract
Food allergy is a growing healthcare problem worldwide, but prophylactic options and regulatory therapies are limited. Oxytocin (OXT), conventionally acknowledged as a hormone, was recently proven to have potent anti-inflammatory and immunomodulatory activities in certain diseases. Here, we reported the novel function and its underlying mechanisms of OXT on food allergy in vivo and in vitro. We showed that the levels of OXT were elevated in ovalbumin (OVA)-allergic mice and patients with food allergy. In HT-29 cells, OXT inhibited the production of the epithelial cell-derived cytokines thymic stromal lymphopoietin (TSLP), interleukin (IL)-25 and IL-33 by suppressing NF-κB signaling, in which β-arrestin2 participated. These functions of OXT were abolished by oxytocin receptor (OXTR) depletion. Treating OVA-induced BALB/c mice with OXT suppressed TSLP, IL-25 and IL-33 production and attenuated systemic anaphylaxis and intestinal inflammation. OXTR-/- mice showed extreme increases in TSLP, IL-25 and IL-33 levels as well as severe systemic anaphylaxis and intestinal inflammation. In conclusion, through OXTRs, OXT has a promising antiallergic effect on experimental food allergy by suppressing epithelial TSLP, IL-25 and IL-33 production via inhibiting NF-κB signaling and upregulating β-arrestin2 expression. Our study provides a new therapeutic perspective for food allergy in humans.
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Affiliation(s)
- Yiang Yu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Jingxin Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
| | - Chuanyong Liu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China; Provincial Key Lab of Mental Disorders, Shandong University, Jinan, Shandong, China.
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11
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Shi Y, Li S, Zhang H, Zhu J, Che T, Yan B, Li J, Liu C. The effect of macrophage polarization on the expression of the oxytocin signalling system in enteric neurons. J Neuroinflammation 2021; 18:261. [PMID: 34749758 PMCID: PMC8573870 DOI: 10.1186/s12974-021-02313-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 10/29/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND The aim of the current study was to investigate the effect of macrophage polarization on the expression of oxytocin (OT) and the oxytocin receptor (OTR) in enteric neurons. METHODS In this study, we used a classic colitis model and D-mannose model to observe the correlation between macrophage polarization and OT signalling system. In order to further demonstrate the effect of macrophages, we examined the expression of OT signalling system after depletion of macrophages. RESULTS The data showed that, in vitro, following polarization of macrophages to the M1 type by LPS, the macrophage supernatant contained proinflammatory cytokines (IL-1β, IL-6 and TNF-α) that inhibited the expression of OT and OTR in cultured enteric neurons; following macrophage polarization to the M2 type by IL4, the macrophage supernatant contained anti-inflammatory cytokines (TGF-β) that promoted the expression of OT and OTR in cultured enteric neurons. Furthermore, M1 macrophages decreased the expression of the OT signalling system mainly through STAT3/NF-κB pathways in cultured enteric neurons; M2 macrophages increased the expression of the OT signalling system mainly through activation of Smad2/3 and inhibition of the expression of Peg3 in cultured enteric neurons. In a colitis model, we demonstrated that macrophages were polarized to the M1 type during the inflammatory phase, with significant decreased in the expression of OT and OTR. When macrophages were polarized to the M2 type during the recovery phase, OT and OTR expression increased significantly. In addition, we found that D-mannose increased the expression of OT and OTR through polarization of macrophages to the M2 type. CONCLUSIONS This is the first study to demonstrate that macrophage polarization differentially regulates the expression of OT and OTR in enteric neurons.
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Affiliation(s)
- Yao Shi
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, 44 Wenhua Xi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Shuang Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, 44 Wenhua Xi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Haojie Zhang
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, 44 Wenhua Xi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Jianchun Zhu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, 44 Wenhua Xi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Tongtong Che
- School of Biological Science and Technology, Jinan University, 336 Nanxinzhuang Xi Road, Jinan, 250012, People's Republic of China
| | - Bing Yan
- Jinan Central Hospital Affiliated to Shandong University, Jinan, 250012, Shandong, People's Republic of China
| | - Jingxin Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, 44 Wenhua Xi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Chuanyong Liu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo Medical College, Shandong University, 44 Wenhua Xi Road, Jinan, 250012, Shandong, People's Republic of China. .,Provincial Key Lab of Mental Disorders, Shandong University, Jinan, 250012, Shandong, People's Republic of China.
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12
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Cheng H, Huang H, Guo Z, Chang Y, Li Z. Role of prostaglandin E2 in tissue repair and regeneration. Am J Cancer Res 2021; 11:8836-8854. [PMID: 34522214 PMCID: PMC8419039 DOI: 10.7150/thno.63396] [Citation(s) in RCA: 101] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/05/2021] [Indexed: 12/14/2022] Open
Abstract
Tissue regeneration following injury from disease or medical treatment still represents a challenge in regeneration medicine. Prostaglandin E2 (PGE2), which involves diverse physiological processes via E-type prostanoid (EP) receptor family, favors the regeneration of various organ systems following injury for its capabilities such as activation of endogenous stem cells, immune regulation, and angiogenesis. Understanding how PGE2 modulates tissue regeneration and then exploring how to elevate the regenerative efficiency of PGE2 will provide key insights into the tissue repair and regeneration processes by PGE2. In this review, we summarized the application of PGE2 to guide the regeneration of different tissues, including skin, heart, liver, kidney, intestine, bone, skeletal muscle, and hematopoietic stem cell regeneration. Moreover, we introduced PGE2-based therapeutic strategies to accelerate the recovery of impaired tissue or organs, including 15-hydroxyprostaglandin dehydrogenase (15-PGDH) inhibitors boosting endogenous PGE2 levels and biomaterial scaffolds to control PGE2 release.
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13
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Buemann B, Marazziti D, Uvnäs-Moberg K. Can intravenous oxytocin infusion counteract hyperinflammation in COVID-19 infected patients? World J Biol Psychiatry 2021; 22:387-398. [PMID: 32914674 DOI: 10.1080/15622975.2020.1814408] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Based on its well-documented anti-inflammatory and restorative properties we propose trials with the natural hormone oxytocin for treatment of hospitalised Covid-19 patients. METHODS We searched for, retrieved, and commented on specific literature regarding multiple functions of oxytocin with a special focus on its modulation of inflammatory, immune, and restorative functions. RESULTS Available data gathered in animals and humans support the anti-inflammatory properties of oxytocin. The multiple anti-inflammatory effects of oxytocin have been demonstrated in vitro and in vivo in various animal models and also in humans in response to intravenous infusion of oxytocin. Furthermore, oxytocin has been documented to activate several types of protective and restorative mechanisms and to exert positive effects on the immune system. CONCLUSIONS In addition, to being anti-inflammatory, it may be hypothesised, that oxytocin may be less suppressive on adaptive immune systems, as compared with glucocorticoids. Finally, by its restorative effects coupled with its anti-stress and healing properties, oxytocin may shorten the recovery period of the Covid-19 patients.
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Affiliation(s)
| | - Donatella Marazziti
- Department of Experimental and Clinical Medicine, Section of Psychiatry, University of Pisa, Pisa, Italy
| | - Kerstin Uvnäs-Moberg
- Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Skara, Sweden
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Dou D, Liang J, Zhai X, Li G, Wang H, Han L, Lin L, Ren Y, Liu S, Liu C, Guo W, Li J. Oxytocin signalling in dendritic cells regulates immune tolerance in the intestine and alleviates DSS-induced colitis. Clin Sci (Lond) 2021; 135:597-611. [PMID: 33564880 DOI: 10.1042/cs20201438] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND Ulcerative colitis (UC) is a type of inflammatory bowel disease (IBD) that is associated with immune dysfunction. Recent studies have indicated that the neurosecretory hormone oxytocin (OXT) has been proven to alleviate experimental colitis. METHODS We investigated the role of OXT/OXT receptor (OXTR) signalling in dendritic cells (DCs) using mice with specific OXTR deletion in CD11c+ cells (OXTRflox/flox×CD11c-cre mice) and a dextran sulfate sodium (DSS)-induced colitis model. RESULTS The level of OXT was abnormal in the serum or colon tissue of DSS-induced colitis mice or the plasma of UC patients. Both bone marrow-derived DCs (BMDCs) and lamina propria DCs (LPDCs) express OXTR. Knocking out OXTR in DCs exacerbated DSS-induced acute and chronic colitis in mice. In contrast, the injection of OXT-pretreated DCs significantly ameliorated colitis. Mechanistically, OXT prevented DC maturation through the phosphatidylinositol 4,5-bisphosphate 3-kinase (Pi3K)/AKT pathway and promoted phagocytosis, adhesion and cytokine modulation in DCs. Furthermore, OXT pre-treated DCs prevent CD4+ T cells differentiation to T helper 1 (Th1) and Th17. CONCLUSIONS Our results suggest that OXT-induced tolerogenic DCs efficiently protect against experimental colitis via Pi3K/AKT pathway. Our work provides evidence that the nervous system participates in the immune regulation of colitis by modulating DCs. Our findings suggest that generating ex vivo DCs pretreated with OXT opens new therapeutic perspectives for the treatment of UC in humans.
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Affiliation(s)
- Dandan Dou
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Jinghui Liang
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Xiangyu Zhai
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Guosheng Li
- Department of Hematology, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Hongjuan Wang
- Department of Gastroenterology, Second Hospital, Shandong University, Jinan 250000, China
| | - Liying Han
- College of Life Science, Shandong Normal University, Jinan 250014, China
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266000, China
| | - Lin Lin
- Department of Gastroenterology, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Yifei Ren
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Shilian Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Chuanyong Liu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Wei Guo
- Department of Colorectal Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Jingxin Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
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15
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Zhu J, Li Y, Liang J, Li J, Huang K, Li J, Liu C. The neuroprotective effect of oxytocin on vincristine-induced neurotoxicity in mice. Toxicol Lett 2021; 340:67-76. [PMID: 33429010 DOI: 10.1016/j.toxlet.2021.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 12/01/2020] [Accepted: 01/04/2021] [Indexed: 02/07/2023]
Abstract
Vincristine (VCR) is commonly used to treat a variety of hematological malignancies and solid tumors in pediatric and adult patients. However, peripheral neuropathy is a dose-limiting side effect that leaves some patients with functional disability and long-term pain. Oxytocin (OT) has demonstrated analgesic and anti-inflammatory properties, but there is no evidence regarding its effects on VCR-induced neurotoxicity. Therefore, we evaluated the potential protective effects of OT on VCR-induced neurotoxicity. In vitro, VCR (0.005 ∼ 0.1 μmol/l) and OT (10-8 ∼ 10-5 mol/l) were added into cultured primary dorsal root ganglion (DRG) neurons of mice. The length of neurites was counted by using immunofluorescence. In vivo, neurotoxicity was induced in mice by administration of VCR (0.1 mg/kg, intraperitoneal injection for 14 days) with or without pretreatment of OT (0.1 mg/kg or 1 mg/kg). Atosiban, an OT receptor (OTR) antagonist and OTR knockout (KO) mice were used for evaluating effects of OTR. Mechanical hyperalgesia was measured by using von Frey filaments. Histology of plantar skin, sciatic nerve and DRG was observed by using transmission electron microscopy (TEM) and hematoxylin-eosin (HE) staining. Results indicated that OT alleviated VCR-induced neurite damage in cultured primary DRG neurons in vitro. In vivo, OT ameliorated VCR-induced hyperalgesia. Histologically, OT attenuated the VCR-induced damages of nerve endings, myelin sheaths and Schwann cells in sciatic nerve and DRG. These effects were antagonized by atosiban. In addition, OTR knockout mice exhibited more severe hyperalgesia than wild-type mice. Globally, these results indicated that OT may have neuroprotective effects on vincristine-induced neurotoxicity in mice.
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Affiliation(s)
- Jianchun Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, PR China
| | - Yang Li
- Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, PR China
| | - Jinghui Liang
- Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, PR China
| | - Jingxin Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, PR China
| | - Kai Huang
- Department of Oncology, Shandong University Qilu Hospital, Jinan, Shandong, PR China
| | - Jing Li
- Department of Pathology, Zibo Central Hospital, Zibo, Shandong, PR China
| | - Chuanyong Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, PR China.
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16
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Gao DD, Wang LL, Xu JW, Qiu ZE, Zhu YX, Zhang YL, Zhou WL. Cellular mechanism underlying oxytocin-stimulated Cl - secretion in rat cauda epididymal epithelium. Am J Physiol Cell Physiol 2020; 319:C630-C640. [PMID: 32726160 DOI: 10.1152/ajpcell.00397.2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The neurohypophyseal hormone oxytocin (OT) plays critical roles in lactation and parturition, while its function in male reproduction system is largely unknown. This study aims to investigate the effect of OT on regulating transepithelial ion transport in rat cauda epididymal epithelium. With the use of RT-PCR, Western blot, and immunohistochemical analysis, we found that OT receptor (OTR) was expressed and localized at the basal membrane of rat cauda epididymal epithelium. The short-circuit current (Isc) measurement showed that basolateral application of OT to the primary cultured rat cauda epididymal epithelial cells elicited an increase in Isc, which was abrogated by pretreating the epithelial cells with CFTRinh-172, a blocker of cystic fibrosis transmembrane conductance regulator (CFTR). Pretreatment with the prostaglandin H synthase inhibitors indomethacin and piroxicam, or the nonselective antagonists of prostaglandin E2 (PGE2) receptor EP2 or EP4, AH-6809, and AH-23848, significantly attenuated OT-stimulated Isc response. Furthermore, the generation of PGE2 was measured using enzyme-linked immunosorbent assay, demonstrating that OT induced a substantial increase in PGE2 release from primary cultured rat cauda epididymal epithelial cells. In conclusion, activation of OTR by OT triggered PGE2 release, resulting in CFTR-dependent Cl- secretion through paracrine/autocrine pathways in rat cauda epididymal epithelium.
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Affiliation(s)
- Dong-Dong Gao
- School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Sport and Health Promotion, Scientific Research Center, Guangzhou Sport University, Guangzhou, China
| | - Long-Long Wang
- School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Jia-Wen Xu
- School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhuo-Er Qiu
- School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yun-Xin Zhu
- School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yi-Lin Zhang
- School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Wen-Liang Zhou
- School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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17
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Buemann B, Uvnäs-Moberg K. Oxytocin may have a therapeutical potential against cardiovascular disease. Possible pharmaceutical and behavioral approaches. Med Hypotheses 2020; 138:109597. [PMID: 32032912 DOI: 10.1016/j.mehy.2020.109597] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 01/11/2020] [Accepted: 01/22/2020] [Indexed: 12/22/2022]
Abstract
Based on the ancient role of oxytocin and its homologues as amplifiers of reproduction we argue for an evolutionary coupling of oxytocin to signaling pathway which support restorative mechanisms of cells and tissue. In particular, the survival and function of different categories of stem cells and primordial cells are enhanced by mitogen-activated protein kinase (MAPK) pathways. Furthermore, oxytocin stimulates the AMP-activated protein kinase pathway (AMPK) in numerous of cell types which promotes the maintenance of different cell structures. This involves autophagic processes and, in particular, may support the renewal of mitochondria. Mitochondrial fitness may protect against oxidative and inflammatory stress - a well-documented effect of oxytocin. The combined specific trophic and protective effects oxytocin may delay several degenerative phenomena including sarcopenia, type-2 diabetes and atherosclerosis. These effects may be exerted both on a central level supporting the function and integrity of the hypothalamus and peripherally acting directly on blood vessels, pancreas, heart, skeletal muscles and adipose tissue etc. Furthermore, in the capacity of being both a hormone and neuromodulator, oxytocin interacts with numerous of regulatory mechanisms particularly the autonomic nervous system and HPA-axis which may reduce blood pressure and affect the immune function. The potential of the oxytocin system as a behavioral and molecular target for the prevention and treatment of cardiovascular disease is discussed. Focus is put on the affiliative and sexual significance and the different options and limitations associated with a pharmaceutical approach. MeSH: Aging, Atherosclerosis, Heart, Hypothalamus, Inflammation, Love, Orgasm, Oxytocin.
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Affiliation(s)
| | - Kerstin Uvnäs-Moberg
- Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Skara, Sweden
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18
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Li R, Sun H, Zheng H, Zong Z, Li S, Meng T, Li J, Liu Y, Wang C, Li J. Intradermal Injection of Oxytocin Aggravates Chloroquine-Induced Itch Responses via Activating the Vasopressin-1a Receptor/Nitric Oxide Pathway in Mice. Front Pharmacol 2019; 10:1380. [PMID: 31824317 PMCID: PMC6881818 DOI: 10.3389/fphar.2019.01380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Accepted: 10/30/2019] [Indexed: 12/14/2022] Open
Abstract
Oxytocin (OT), a hormone synthesized within the paraventricular nucleus and supraoptic nucleus of the hypothalamus, when given intracerebroventricularly, induces strong scratching behaviors. However, it is not clear whether intradermal injection (ID) of OT elicits itch sensation. Herein, we found that OT (0.02 mg/ml) did not elicit an itch-scratching response in mice but aggravated chloroquine (CQ, 3 mmol/L)-elicited scratching behavior. Similar to OT, arginine vasopressin (AVP, 0.02 mg/ml), which is structurally related to OT, also enhanced CQ-induced scratching behavior but did not directly induce scratching behavior in mice. Mechanistically, OT-mediated enhancement of CQ-induced scratching behavior was significantly suppressed by conivaptan (0.05 mg/ml), a vasopressin-1a receptor (V1AR) antagonist and 1,400 W (3 mg/kg), inhibitor of inducible nitric oxide synthase (iNOS), but not OT receptor (OTR) antagonist L-368,899 (0.05 mg/ml). Notably, conivaptan also directly decreased CQ-induced scratching. In conclusion, OT plays a role in CQ-induced scratching behavior via V1AR binding events. V1AR antagonists could be used as possible treatments for CQ-induced itch.
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Affiliation(s)
- Rulong Li
- Department of Physiology, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, China
| | - Hua Sun
- Department of the Sixth Internal Medicine, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Haotian Zheng
- Department of Physiology, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, China
| | - Zhihua Zong
- Department of Physiology, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, China
| | - Shengnan Li
- Department of Physiology, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, China
| | - Tingting Meng
- Department of Physiology, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, China
| | - Jing Li
- Department of Pathology, Central Hospital of Zibo, Zibo, China
| | - Yunfang Liu
- Center for Strategic Studies, Chinese Academy of Engineering, Beijing, China
| | - Chao Wang
- Department of Rehabilitation Medicine, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Jingxin Li
- Department of Physiology, School of Basic Medical Sciences, Shandong University Cheeloo Medical College, Jinan, China
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19
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Oxytocin system alleviates intestinal inflammation by regulating macrophages polarization in experimental colitis. Clin Sci (Lond) 2019; 133:1977-1992. [PMID: 31519790 DOI: 10.1042/cs20190756] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/10/2019] [Accepted: 09/12/2019] [Indexed: 12/14/2022]
Abstract
Inflammatory bowel disease (IBD) is a chronic intestinal inflammation, but the accurate etiology remains to be elucidated. Increasing evidence has shown that macrophages polarize to different phenotypes depending on the intestinal microenvironment and are associated with the progression of IBD. In the present study, we investigated the effect of oxytocin, a neuroendocrinal, and pro-health peptide, on the modulation of macrophages polarization and the progression of experimental colitis. Our data demonstrated that oxytocin decreased the sensitivity of macrophages to lipopolysaccharide stimulation with lower expression of inflammatory cytokines, like IL-1β, IL-6, and TNF-α, but increased the sensitivity to IL-4 stimulation with enhanced expression of M2-type genes, arginase I (Arg1), CD206, and chitinase-like 3 (Chil3). This bidirectional modulation was partly due to the up-regulation of β-arrestin2 and resulted in the inhibition of NF-κB signaling and reinforcement of Signal transducer and activator of transcription (STAT) 6 phosphorylation. Moreover, oxytocin receptor (OXTR) myeloid deficiency mice were more susceptible to dextran sulfate sodium (DSS) intervention compared with the wild mice. For the first time, we reveal that oxytocin-oxytocin receptor system participates in modulating the polarization of macrophages to an anti-inflammatory phenotype and alleviates experimental colitis. These findings provide new potential insights into the pathogenesis and therapy of IBD.
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20
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Dou D, Chen L, Di H, Song Z, Li S, Bu X, Dai Q, Wang S, Li JX, Zhu X, Jing H. Vasopressin augments TNBS-induced colitis through enteric neuronal V 1a receptor-mediated COX-2-dependent prostaglandin release from mast cells in mice. Neurogastroenterol Motil 2019; 31:e13493. [PMID: 30334342 DOI: 10.1111/nmo.13493] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 09/04/2018] [Accepted: 09/20/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Inflammatory bowel disease (IBD) is a functional disorder with chronic and relapsing clinical features. Vasopressin (VP) is a hormone responsible for water and stress homeostasis and also regulates gastrointestinal inflammation and motility. We explored whether VP was related to IBD pathogenesis and its possible pathway. METHODS Colitis was induced by 2,4,6-trinitrobenzenesulfonic acid (TNBS) in mice. The disease activity and colonic damage were evaluated through a scoring system. Locations of the V1a receptor were revealed by immunochemistry method in colon. Ussing chamber technique was performed for the electrophysiological characterization by using rat ileum. The (Arg8 )-Vasopressin (AVP)-evoked short-circuit current (Isc) was recorded in the presence of conivaptan (V1a and V2 receptor antagonist), tolvaptan (V1b receptor antagonist), tetrodotoxin (TTX), atropine, cyclooxygenase (COX) inhibitors (indomethacin, nonspecific COX antagonist; SC560, COX-1 antagonist; NS560, COX-2 antagonist), and a stabilizer of mast cell (cromolyn sodium), respectively. KEY RESULTS TNBS resulted in the obvious loss of body weight and tissue damages in mice. AVP significantly aggravated the TNBS-induced colitis, which was attenuated by conivaptan but not tolvaptan. V1a receptors were found immunopositive in neurons among the enteric nervous system. AVP evoked a pulsatile response in Isc. Its amplitude, frequency, and cycle duration were around 8-15 µA/cm2 , 10-11 mHz, and 1.5 minutes, respectively. Notably, the AVP-evoked change in Isc was abolished by TTX, atropine, conivaptan, indomethacin, NS560, and cromolyn sodium, respectively. CONCLUSIONS AND INFERENCES VP-V1a receptor played the proinflammatory role in TNBS-induced colitis by promoting COX-2-dependent prostaglandin release from mucosal mast cells, which was mediated by the cholinergic pathway.
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Affiliation(s)
- Dandan Dou
- Department of Physiology, School of Basic Medical Science, Shandong University, Jinan, China
| | - Lixin Chen
- School of Medicine, Shandong University, Jinan, China
| | - Hong Di
- School of Medicine, Shandong University, Jinan, China
| | - Zhuoran Song
- School of Medicine, Shandong University, Jinan, China
| | - Shirui Li
- School of Medicine, Shandong University, Jinan, China
| | - Xinjie Bu
- School of Medicine, Shandong University, Jinan, China
| | - Qing Dai
- School of Medicine, Shandong University, Jinan, China
| | - Shuai Wang
- School of Medicine, Shandong University, Jinan, China
| | - Jing Xin Li
- Department of Physiology, School of Basic Medical Science, Shandong University, Jinan, China
| | - Xiaolong Zhu
- Department of Cardiac Surgery Cardiac, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Haiyan Jing
- Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
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Zhou M, He J, Shen Y, Zhang C, Wang J, Chen Y. New Frontiers in Genetics, Gut Microbiota, and Immunity: A Rosetta Stone for the Pathogenesis of Inflammatory Bowel Disease. BIOMED RESEARCH INTERNATIONAL 2017; 2017:8201672. [PMID: 28831399 PMCID: PMC5558637 DOI: 10.1155/2017/8201672] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 06/03/2017] [Accepted: 07/03/2017] [Indexed: 02/07/2023]
Abstract
Inflammatory bowel disease (IBD), which encompasses ulcerative colitis (UC) and Crohn's disease (CD), is a complicated, uncontrolled, and multifactorial disorder characterized by chronic, relapsing, or progressive inflammatory conditions that may involve the entire gastrointestinal tract. The protracted nature has imposed enormous economic burdens on patients with IBD, and the treatment is far from optimal due to the currently limited comprehension of IBD pathogenesis. In spite of the exact etiology still remaining an enigma, four identified components, including personal genetic susceptibility, external environment, internal gut microbiota, and the host immune response, are responsible for IBD pathogenesis, and compelling evidence has suggested that IBD may be triggered by aberrant and continuing immune responses to gut microbiota in genetically susceptibility individuals. The past decade has witnessed the flourishing of research on genetics, gut microbiota, and immunity in patients with IBD. Therefore, in this review, we will comprehensively exhibit a series of novel findings and update the major advances regarding these three fields. Undoubtedly, these novel findings have opened a new horizon and shed bright light on the causality research of IBD.
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Affiliation(s)
- Mingxia Zhou
- Department of Gastroenterology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
| | - Jing He
- Department of General Surgery, Huashan Hospital of Fudan University, Shanghai 200040, China
| | - Yujie Shen
- Department of Gastroenterology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
| | - Cong Zhang
- Department of Gastroenterology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
| | - Jiazheng Wang
- Department of Gastroenterology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
| | - Yingwei Chen
- Department of Gastroenterology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
- Shanghai Institute for Pediatric Research, Shanghai 200092, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai 200092, China
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22
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Kim SH, Pohl O, Chollet A, Gotteland JP, Fairhurst ADJ, Bennett PR, Terzidou V. Differential Effects of Oxytocin Receptor Antagonists, Atosiban and Nolasiban, on Oxytocin Receptor-Mediated Signaling in Human Amnion and Myometrium. Mol Pharmacol 2017; 91:403-415. [PMID: 28188254 PMCID: PMC5363712 DOI: 10.1124/mol.116.106013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 01/30/2017] [Indexed: 12/14/2022] Open
Abstract
One of the most established roles of oxytocin (OT) is in inducing uterine contractions and labor. Apart from inducing contractions, our recent studies showed that OT can also activate proinflammatory pathways in both human myometrial and amnion cells, which suggests that the proinflammatory role of OT should be taken into account when developing tocolytics targeting the OT/oxytocin receptor (OTR) system. The OTR antagonist, atosiban, is currently used therapeutically for the treatment of preterm labor. We previously showed that atosiban fails to inhibit the proinflammatory effects of OT in human amnion; atosiban alone activates nuclear factor-κB (NF-κB) and mitogen activated protein kinases, thus upregulating downstream prolabor genes. In contrast with our findings with atosiban, the presence of the orally active OTR antagonist, nolasiban, reduced the effect of OT on NF-κB and p38 kinase activation in both myometrial and amnion cells. Consistent with the activation of these inflammatory mediators, OT led to increases in the expression of cyclooxygenase-2 and phosphorylated cytosolic phospholipase A2, which was reflected in prostaglandin E2 synthesis. Inhibition of NF-κB activation by nolasiban also translated to suppression of downstream prolabor gene expression, such as cyclooxygenase-2, C-C motif chemokine ligand 2, interleukin-6, and interleukin-8. We also demonstrated that nolasiban treatment alone has no significant stimulatory effect on both the myometrium and amnion. In conclusion, our findings indicate that nolasiban possesses promising potential as a novel tocolytic agent for both acute and maintenance therapy, as it inhibits both myometrial contractions and the proinflammatory effects of OT without the biased agonist effects.
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Affiliation(s)
- Sung Hye Kim
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital Campus (S.H.K., A.D.J.F., P.R.B., V.T.) and Chelsea and Westminster Hospital (V.T.), Imperial College London, London, United Kingdom; and ObsEva SA, Geneva, Switzerland (O.P., A.C., J.-P.G.)
| | - Oliver Pohl
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital Campus (S.H.K., A.D.J.F., P.R.B., V.T.) and Chelsea and Westminster Hospital (V.T.), Imperial College London, London, United Kingdom; and ObsEva SA, Geneva, Switzerland (O.P., A.C., J.-P.G.)
| | - Andre Chollet
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital Campus (S.H.K., A.D.J.F., P.R.B., V.T.) and Chelsea and Westminster Hospital (V.T.), Imperial College London, London, United Kingdom; and ObsEva SA, Geneva, Switzerland (O.P., A.C., J.-P.G.)
| | - Jean-Pierre Gotteland
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital Campus (S.H.K., A.D.J.F., P.R.B., V.T.) and Chelsea and Westminster Hospital (V.T.), Imperial College London, London, United Kingdom; and ObsEva SA, Geneva, Switzerland (O.P., A.C., J.-P.G.)
| | - Adam D J Fairhurst
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital Campus (S.H.K., A.D.J.F., P.R.B., V.T.) and Chelsea and Westminster Hospital (V.T.), Imperial College London, London, United Kingdom; and ObsEva SA, Geneva, Switzerland (O.P., A.C., J.-P.G.)
| | - Phillip R Bennett
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital Campus (S.H.K., A.D.J.F., P.R.B., V.T.) and Chelsea and Westminster Hospital (V.T.), Imperial College London, London, United Kingdom; and ObsEva SA, Geneva, Switzerland (O.P., A.C., J.-P.G.)
| | - Vasso Terzidou
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital Campus (S.H.K., A.D.J.F., P.R.B., V.T.) and Chelsea and Westminster Hospital (V.T.), Imperial College London, London, United Kingdom; and ObsEva SA, Geneva, Switzerland (O.P., A.C., J.-P.G.)
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23
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Chandrakesan P, May R, Weygant N, Qu D, Berry WL, Sureban SM, Ali N, Rao C, Huycke M, Bronze MS, Houchen CW. Intestinal tuft cells regulate the ATM mediated DNA Damage response via Dclk1 dependent mechanism for crypt restitution following radiation injury. Sci Rep 2016; 6:37667. [PMID: 27876863 PMCID: PMC5120335 DOI: 10.1038/srep37667] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 11/01/2016] [Indexed: 12/18/2022] Open
Abstract
Crypt epithelial survival and regeneration after injury require highly coordinated complex interplay between resident stem cells and diverse cell types. The function of Dclk1 expressing tuft cells regulating intestinal epithelial DNA damage response for cell survival/self-renewal after radiation-induced injury is unclear. Intestinal epithelial cells (IECs) were isolated and purified and utilized for experimental analysis. We found that small intestinal crypts of VillinCre;Dclk1f/f mice were hypoplastic and more apoptotic 24 h post-total body irradiation, a time when stem cell survival is p53-independent. Injury-induced ATM mediated DNA damage response, pro-survival genes, stem cell markers, and self-renewal ability for survival and restitution were reduced in the isolated intestinal epithelial cells. An even greater reduction in these signaling pathways was observed 3.5 days post-TBI, when peak crypt regeneration occurs. We found that interaction with Dclk1 is critical for ATM and COX2 activation in response to injury. We determined that Dclk1 expressing tuft cells regulate the whole intestinal epithelial cells following injury through paracrine mechanism. These findings suggest that intestinal tuft cells play an important role in regulating the ATM mediated DNA damage response, for epithelial cell survival/self-renewal via a Dclk1 dependent mechanism, and these processes are indispensable for restitution and function after severe radiation-induced injury.
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Affiliation(s)
- Parthasarathy Chandrakesan
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- OU Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
| | - Randal May
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
| | - Nathaniel Weygant
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Dongfeng Qu
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- OU Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - William L. Berry
- OU Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Sripathi M. Sureban
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
| | - Naushad Ali
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
| | - Chinthalapally Rao
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- OU Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Mark Huycke
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
| | - Michael S. Bronze
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Courtney W. Houchen
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- OU Cancer Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
- COARE Biotechnology, Inc., Oklahoma City, OK 73104, USA
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The antinociception of oxytocin on colonic hypersensitivity in rats was mediated by inhibition of mast cell degranulation via Ca(2+)-NOS pathway. Sci Rep 2016; 6:31452. [PMID: 27538454 PMCID: PMC4990927 DOI: 10.1038/srep31452] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 07/18/2016] [Indexed: 12/17/2022] Open
Abstract
This study was conducted to investigate the effects of oxytocin (OT) on visceral hypersensitivity/pain and mast cell degranulation and the underlying mechanisms. We found that oxytocin receptor (OTR) was expressed in colonic mast cells in humans and rats, as well as in human mast cell line-1 (HMC-1), rat basophilic leukemia cell line (RBL-2H3) and mouse mastocytoma cell line (P815). OT decreased 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced visceral hypersensitivity, colonic mast cell degranulation and histamine release after mast cell degranulation in rats. Also, OT attenuated the compound 48/80 (C48/80)-evoked histamine release in P815 cells and inward currents, responsible for the mast cell degranulation, in HMC-1, RBL-2H3 and P815 cells. Moreover, these protective effects of OT against visceral hypersensitivity and mast cell degranulation were eliminated by coadministration of OTR antagonist atosiban or a nonselective inhibitor of nitric oxide synthase (NOS), NG-Methyl-L-arginine acetate salt (L-NMMA). Notably, OT evoked a concentration-dependent increase of intracellular Ca2+ in HMC-1, RBL-2H3 and P815 cells, which was responsible for the activation of neuronal NOS (NOS1) and endothelial NOS (NOS3). Our findings strongly suggest that OT might exert the antinociception on colonic hypersensitivity through inhibition of mast cell degranulation via Ca2+-NOS pathway.
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25
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Gao JH, Wen SL, Tong H, Wang CH, Yang WJ, Tang SH, Yan ZP, Tai Y, Ye C, Liu R, Huang ZY, Tang YM, Yang JH, Tang CW. Inhibition of cyclooxygenase-2 alleviates liver cirrhosis via improvement of the dysfunctional gut-liver axis in rats. Am J Physiol Gastrointest Liver Physiol 2016; 310:G962-72. [PMID: 27056726 DOI: 10.1152/ajpgi.00428.2015] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 04/04/2016] [Indexed: 02/07/2023]
Abstract
Inflammatory transport through the gut-liver axis may facilitate liver cirrhosis. Cyclooxygenase-2 (COX-2) has been considered as one of the important molecules that regulates intestinal epithelial barrier function. This study was aimed to test the hypothesis that inhibition of COX-2 by celecoxib might alleviate liver cirrhosis via reduction of intestinal inflammatory transport in thiacetamide (TAA) rat model. COX-2/prostaglandin E2 (PGE2)/EP-2/p-ERK integrated signal pathways regulated the expressions of intestinal zonula occludens-1 (ZO-1) and E-cadherin, which maintain the function of intestinal epithelial barrier. Celecoxib not only decreased the intestinal permeability to a 4-kDa FITC-dextran but also significantly increased expressions of ZO-1 and E-cadherin. When celecoxib greatly decreased intestinal levels of LPS, TNF-α, and IL-6, it significantly enhanced T cell subsets reduced by TAA. As a result, liver fibrosis induced by TAA was significantly alleviated in the celecoxib group. These data indicated that celecoxib improved the integrity of intestinal epithelial barrier, blocked inflammatory transport through the dysfunctional gut-liver axis, and ameliorated the progress of liver cirrhosis.
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Affiliation(s)
- Jin-Hang Gao
- Division of Peptides Related with Human Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China; Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Shi-Lei Wen
- Department of Human Anatomy, Academy of Preclinical and Forensic Medicine, West China Medicine College, Sichuan University, Chengdu, China; and
| | - Huan Tong
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Chun-Hui Wang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Wen-Juan Yang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Shi-Hang Tang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Zhao-Ping Yan
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Yang Tai
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Cheng Ye
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Rui Liu
- Division of Peptides Related with Human Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Zhi-Yin Huang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
| | - Ying-Mei Tang
- Department of Gastroenterology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jin-Hui Yang
- Department of Gastroenterology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Cheng-Wei Tang
- Division of Peptides Related with Human Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China; Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China; and
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