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Yadollahzadeh M, Rezaie N, Eskandari M, Farrokhpour M, Azimi M, Farasatinasab M. Variable Levels of Oxytocin During Sepsis: The Role of Oxytocin in Sepsis Pathophysiology. J Intensive Care Med 2023; 38:997-1002. [PMID: 37211665 DOI: 10.1177/08850666231177255] [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] [Indexed: 05/23/2023]
Abstract
BACKGROUND Although the role of oxytocin in the pathophysiology of sepsis is still unknown, rising preclinical evidence suggests that oxytocin is possibly involved. However, no direct clinical studies have measured the levels of oxytocin during sepsis. In this preliminary study, the serum oxytocin levels were evaluated throughout the duration of sepsis. METHOD Twenty-two male patients over 18 years of age with a SOFA score of 2 points or more who were admitted to the ICU were included. Patients with a history of neuroendocrine, psychiatric, and neurologic disorders, cancer, an infection caused by COVID-19, shock due to reasons other than sepsis, a history of psychiatric or neurologic medication use, and those who died during the study were excluded. The main endpoint included the measurement of serum oxytocin levels using radioimmunoassay at 6, 24, and 48 h of the ICU admission. RESULTS Mean serum oxytocin level was higher at 6 h of ICU admission (41.27 ± 13.14 ng/L) than after 24 and 48 h of ICU admission (22.63 ± 5.75 and 20.97 ± 7.61 ng/L respectively) (P-value < .001). CONCLUSION Our study, while reporting increased serum oxytocin levels in the initial phase of sepsis and decline afterward, supports the possible contribution of oxytocin in the pathophysiology of sepsis. Given that oxytocin seems to modulate the innate immune system, future investigations are necessary to assess the potential role of oxytocin in the pathophysiology of sepsis.
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Affiliation(s)
- Mahdi Yadollahzadeh
- Department of Internal Medicine, Firoozgar Medical & Educational Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Nader Rezaie
- Department of Internal Medicine, Firoozgar Medical & Educational Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohana Eskandari
- Department of Internal Medicine, Firoozgar Medical & Educational Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohsen Farrokhpour
- Department of Internal Medicine, Firoozgar Medical & Educational Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mehdi Azimi
- Department of Internal Medicine, Firoozgar Medical & Educational Hospital, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Farasatinasab
- Department of Clinical Pharmacy, School of Pharmacy-International Campus, Firoozgar Clinical Research Development Center (FCRDC), Iran University of Medical Sciences, Tehran, Iran
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Zhong J, Amina S, Liang M, Akther S, Yuhi T, Nishimura T, Tsuji C, Tsuji T, Liu HX, Hashii M, Furuhara K, Yokoyama S, Yamamoto Y, Okamoto H, Zhao YJ, Lee HC, Tominaga M, Lopatina O, Higashida H. Cyclic ADP-Ribose and Heat Regulate Oxytocin Release via CD38 and TRPM2 in the Hypothalamus during Social or Psychological Stress in Mice. Front Neurosci 2016; 10:304. [PMID: 27499729 PMCID: PMC4956647 DOI: 10.3389/fnins.2016.00304] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 06/16/2016] [Indexed: 12/20/2022] Open
Abstract
Hypothalamic oxytocin (OT) is released into the brain by cyclic ADP-ribose (cADPR) with or without depolarizing stimulation. Previously, we showed that the intracellular free calcium concentration ([Ca2+]i) that seems to trigger OT release can be elevated by β-NAD+, cADPR, and ADP in mouse oxytocinergic neurons. As these β-NAD+ metabolites activate warm-sensitive TRPM2 cation channels, when the incubation temperature is increased, the [Ca2+]i in hypothalamic neurons is elevated. However, it has not been determined whether OT release is facilitated by heat in vitro or hyperthermia in vivo in combination with cADPR. Furthermore, it has not been examined whether CD38 and TRPM2 exert their functions on OT release during stress or stress-induced hyperthermia in relation to the anxiolytic roles and social behaviors of OT under stress conditions. Here, we report that OT release from the isolated hypothalami of male mice in culture was enhanced by extracellular application of cADPR or increasing the incubation temperature from 35°C to 38.5°C, and simultaneous stimulation showed a greater effect. This release was inhibited by a cADPR-dependent ryanodine receptor inhibitor and a nonspecific TRPM2 inhibitor. The facilitated release by heat and cADPR was suppressed in the hypothalamus isolated from CD38 knockout mice and CD38- or TRPM2-knockdown mice. In the course of these experiments, we noted that OT release differed markedly between individual mice under stress with group housing. That is, when male mice received cage-switch stress and eliminated due to their social subclass, significantly higher levels of OT release were found in subordinates compared with ordinates. In mice exposed to anxiety stress in an open field, the cerebrospinal fluid (CSF) OT level increased transiently at 5 min after exposure, and the rectal temperature also increased from 36.6°C to 37.8°C. OT levels in the CSF of mice with lipopolysaccharide-induced fever (+0.8°C) were higher than those of control mice. The TRPM2 mRNA levels and immunoreactivities increased in the subordinate group with cage-switch stress. These results showed that cADPR/CD38 and heat/TRPM2 are co-regulators of OT secretion and suggested that CD38 and TRPM2 are potential therapeutic targets for OT release in psychiatric diseases caused by social stress.
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Affiliation(s)
- Jing Zhong
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Sarwat Amina
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Mingkun Liang
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Shirin Akther
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Teruko Yuhi
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Tomoko Nishimura
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Chiharu Tsuji
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Takahiro Tsuji
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Hong-Xiang Liu
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Minako Hashii
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Kazumi Furuhara
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Shigeru Yokoyama
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa University Kanazawa, Japan
| | - Yasuhiko Yamamoto
- Department of Biochemistry and Molecular Vascular Biology, Kanazawa University Graduate School of Medical Sciences Kanazawa, Japan
| | - Hiroshi Okamoto
- Department of Biochemistry and Molecular Vascular Biology, Kanazawa University Graduate School of Medical SciencesKanazawa, Japan; Department of Biochemistry, Tohoku University Graduate School of MedicineSendai, Japan
| | - Yong Juan Zhao
- School of Chemical Biology and Biotechnology, Peking University Graduate School Shenzhen, China
| | - Hon Cheung Lee
- School of Chemical Biology and Biotechnology, Peking University Graduate School Shenzhen, China
| | - Makoto Tominaga
- Division of Cell Signaling, Okazaki Institute for Integrative Bioscience (National Institute for Physiological Sciences), National Institutes of Natural Sciences Okazaki, Japan
| | - Olga Lopatina
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa UniversityKanazawa, Japan; Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical UniversityKrasnoyarsk, Russia
| | - Haruhiro Higashida
- Department of Basic Research on Social Recognition and Memory, Research Centre for Child Mental Development, Kanazawa UniversityKanazawa, Japan; Research Institute of Molecular Medicine and Pathobiochemistry, Krasnoyarsk State Medical UniversityKrasnoyarsk, Russia
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Oliveira-Pelegrin GR, Saia RS, Cárnio EC, Rocha MJA. Oxytocin affects nitric oxide and cytokine production by sepsis-sensitized macrophages. Neuroimmunomodulation 2013. [PMID: 23183119 DOI: 10.1159/000345044] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIM Oxytocin (OXT) secretion during cecal ligation puncture (CLP)-induced sepsis has not yet been examined. Although immune properties have been attributed to OXT, its effect on CLP-sensitized macrophages has never been investigated. We analyzed OXT secretion during CLP and its effect in CLP-sensitized macrophage cultures. METHODS Male Wistar rats were decapitated 4, 6 or 24 h after CLP surgery or sham operation and blood, brain and neurohypophyses were collected for OXT measurements. In another set of animals we studied the effect of OXT on nitrite, tumor necrosis factor (TNF-α), interleukin (IL)-1β and IL-10 production of peritoneal macrophages harvested at 6 and 24 h after CLP. RESULTS In the early phase of sepsis (4-6 h), OXT levels increased in plasma and decreased in hypothalamus and neurohypophysis. In the late phase (24 h), plasma and neurohypophyseal levels remained basal. In the paraventricular, the OXT content remained low, but in the supraoptic increased. Macrophages of the early phase of sepsis pretreated with OXT and stimulated with lipopolysaccharide showed decreased nitrite, TNF-α and IL-1β levels, but no alteration in IL-10 production. In the late phase, they showed reduction only on IL-1β. CONCLUSIONS OXT secretion during sepsis may represent a neuroendocrine response contributing to the overall host response to infection by decreasing the proinflammatory response and oxidative stress.
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de Almeida RL, Constancio J, Vendramini RC, Fracasso JF, Menani JV, De Luca LA. Lipopolysaccharide reduces sodium intake and sodium excretion in dehydrated rats. Physiol Behav 2010; 102:164-9. [PMID: 20977913 DOI: 10.1016/j.physbeh.2010.10.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 10/14/2010] [Accepted: 10/18/2010] [Indexed: 10/18/2022]
Abstract
The objective of this study was to find out if lipopolysaccharide (LPS) administered intraperitoneally affects sodium and water intake and renal excretion in dehydrated rats. LPS (0.3-5 mg/kg b.w.) inhibited 0.3M NaCl intake induced by subcutaneous injection of the diuretic furosemide (FURO, 10 mg/kg b.w.) combined with the angiotensin converting enzyme inhibitor, captopril (CAP, 5 mg/kg b.w.). Only the highest doses of LPS (2.5 and 5 mg/kg) inhibited water intake induced by FURO/CAP. LPS (0.6 mg/kg) reduced urinary volume and sodium excretion, but had no effect on mean arterial pressure or heart rate of rats treated with FURO/CAP. LPS (0.3-5.0 mg/kg) abolished intracellular thirst and reduced by 50% the urine sodium concentration of rats that received 2 ml of 2M NaCl by gavage. LPS (0.3-5.0 mg/kg) also reduced thirst in rats treated with FURO alone (10 mg/rat sc). The results suggest that LPS has a preferential, but not exclusive, inhibitory effect on sodium intake and on intracellular thirst. The inhibition of hydro-mineral intake and the antinatriuresis caused by LPS in dehydrated rats may contribute to the multiple effects of the endotoxin on fluid and electrolyte balance and be part of the strategy to cope with infections.
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Affiliation(s)
- Roberto L de Almeida
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Brazil
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Oliveira-Pelegrin GR, Aguila FA, Basso PJ, Rocha MJA. Role of central NO-cGMP pathway in vasopressin and oxytocin gene expression during sepsis. Peptides 2010; 31:1847-52. [PMID: 20621145 DOI: 10.1016/j.peptides.2010.06.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 06/26/2010] [Accepted: 06/28/2010] [Indexed: 11/17/2022]
Abstract
Sepsis induces massive production of inflammatory mediators, such as nitric oxide (NO), and causes neuroendocrine and cardiovascular alterations. This study investigates the involvement of the central NO-cGMP pathway in arginine vasopressin (AVP) and oxytocin (OXY) gene expression during sepsis induced by cecal ligation and puncture (CLP). Male Wistar rats received an i.c.v. injection of ODQ (0.25 μg/μL), a selective inhibitor of the heme site of soluble guanylate cyclase, or of 1% dymethilsulfoxide (DMSO), as vehicle. Thirty minutes after the injections, sepsis was induced by cecal ligation and puncture or the animals were sham operated. The ODQ pre-treatment did not alter the progressive NO increase observed after CLP. In the supraoptic nucleus (SON), this pretreatment increased the relative gene expression ratio of AVP and OXY in the initial phase of sepsis, but in the late phase, the gene expression of both hormones was reduced. In the paraventricular nucleus (PVN), soluble guanylate cyclase inhibition caused an even larger decrease in the relative gene expression ratio of AVP and OXY during sepsis. These results are indicative of a role of the NO-cGMP pathway in hormonal synthesis in the SON and PVN of the hypothalamus during polymicrobial sepsis.
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Affiliation(s)
- Gabriela Ravanelli Oliveira-Pelegrin
- Departamento de Morfologia, Estomatologia e Fisiologia, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
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Igarashi K, Akira S, Imaki J, Takeshita T. Systemic endotoxin induces gene expression of inducible nitric oxide synthase in fetal rat brain. J NIPPON MED SCH 2009; 76:232-9. [PMID: 19915306 DOI: 10.1272/jnms.76.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Few studies have examined the response of the fetus under stress, such as with maternal infection. Recent work has indicated that nitric oxide (NO) modulates corticotropin-releasing hormone (CRH) secretion by the hypothalamus, but details of the action of NO on the fetus remain unclear. Therefore, we investigated the expression of inducible nitric oxide synthase (iNOS) mRNA and the response pattern following lipopolysaccharide (LPS) loading using a rat model of fetal infection. METHODS Fetuses were delivered by cesarean section on day 20 of gestation and immediately placed in a chamber maintained at 37 degrees C and 100% relative humidity. The LPS group (n=12) was given 400 microg of LPS/100 g body weight, and the physiologic saline group (n=12) was given physiologic saline. Fetuses were then incubated for a further 3 hours. Fetuses were decapitated, the trunk blood was collected immediately after cesarean section or after 3 hours of incubation, and the fetal brains were fixed in formaldehyde and cryopreserved. Coronal cryosections of the brains were prepared, and a (35)S-uridine triphosphate-labeled antisense RNA probe for iNOS was then prepared. In situ hybridization was performed, and iNOS expression was evaluated semiquantitatively on the basis of optical density. In both groups, plasma corticosterone levels were determined with radioimmunoassay. RESULTS Expression of iNOS mRNA was not noted in the physiologic saline group (3 hours postpartum). In the LPS group, iNOS mRNA expression was observed in the subfornical organ, but not in the paraventricular nucleus. Plasma corticosterone levels were significantly elevated in the LPS group. CONCLUSIONS In 20-day-old rat fetuses, the hypothalamic-pituitary-adrenal axis was already mobilized in response to LPS-induced stress. These results suggest that iNOS is not involved in the acute response of the hypothalamic-pituitary-adrenal axis to LPS challenge in 20-day-old rat fetuses.
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Affiliation(s)
- Kenji Igarashi
- Division of Reproductive Medicine, Perinatology and Gynecologic Oncology, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
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Peterson JR, Infanger DW, Braga VA, Zhang Y, Sharma RV, Engelhardt JF, Davisson RL. Longitudinal noninvasive monitoring of transcription factor activation in cardiovascular regulatory nuclei using bioluminescence imaging. Physiol Genomics 2008; 33:292-9. [PMID: 18230667 DOI: 10.1152/physiolgenomics.00296.2007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The ability to monitor transcription factor (TF) activation in the central nervous system (CNS) has the potential to provide novel information regarding the molecular mechanisms underlying a wide range of neurobiological processes. However, traditional biochemical assays limit the mapping of TF activity to select time points. In vivo bioluminescence imaging (BLI) has emerged as an attractive technology for visualizing internal molecular events in the same animal over time. Here, we evaluated the utility of BLI, in combination with virally mediated delivery of reporter constructs to cardiovascular nuclei, for monitoring of TF activity in these discrete brain regions. Following viral gene transfer of NF-kappaB-driven luciferase reporter to the subfornical organ (SFO), BLI enabled daily measurements of baseline TF activity in the same animal for 1 mo. Importantly, systemic endotoxin, a stimulator of NF-kappaB activity, induced dramatic and dose-dependent increases in NF-kappaB-dependent bioluminescence in the SFO up to 30 days after gene transfer. Cotreatment with a dominant-negative IkappaBalpha mutant significantly prevented endotoxin-dependent NF-kappaB activation, confirming the specificity of the bioluminescence signal. NF-kappaB-dependent luminescence signals were also stable and inducible 1 mo following delivery of luciferase reporter construct to the paraventricular nucleus or rostral ventrolateral medulla. Lastly, using targeted adenoviral delivery of an AP-1 responsive luciferase reporter, we showed similar baseline and endotoxin-induced AP-1 activity in these same brain regions as with NF-kappaB reporters. These results demonstrate that BLI, in combination with virally mediated gene transfer, is a powerful method for longitudinal monitoring and quantification of TF activity in targeted CNS nuclei in vivo.
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Affiliation(s)
- Jeffrey R Peterson
- Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853-6401, USA
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