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Shibamoto T, Ono M, Tanida M, Kuda Y, Kurata Y. Mechanisms for hypothermia during anaphylactic hypotension in awake rats. Am J Physiol Regul Integr Comp Physiol 2023; 325:R446-R455. [PMID: 37602385 DOI: 10.1152/ajpregu.00015.2023] [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: 01/17/2023] [Revised: 07/27/2023] [Accepted: 08/10/2023] [Indexed: 08/22/2023]
Abstract
Hypothermia develops during systemic anaphylaxis in rodents. The aim of this study was to elucidate the mechanism for the hypothermia by assessing the roles of locomotor activity, tail heat dissipation, heat production in the brown adipose tissue (BAT) activity, and chemical mediators during ovalbumin-induced anaphylactic hypotension in awake rats. We measured the core body temperature (Tcore) and mean blood pressure (MBP), along with the surface temperature of the interscapular region (TiScap), an indirect measure of BAT activity, and the tail (Ttail). During anaphylaxis, MBP decreased to the nadir of 53 ± 2 mmHg at 8 min with recovery toward baseline. Tcore began to decrease at 7.5 min with the nadir of 36.1 ± 0.2°C at 30 min from the baseline of 38.0 ± 0.1°C. TiScap also significantly decreased, but its onset was preceded by that of Tcore. Ttail decreased after antigen, suggesting the absence of increased heat dissipation from the tail. The physical activity, as evaluated by moved distances, did not decrease until 20 min after antigen, followed by a progressive decrease. Reduced movement using a restraint maneuver not only reduced Tcore in nonsensitized rats but also augmented the anaphylactic hypothermia in the early phase (1.5-18 min) in sensitized rats. Combined antagonism against platelet-activating factor (PAF) and histamine H1 receptors abolished antigen-induced hypotension but only attenuated hypothermia. In conclusion, decreased locomotor activity, but not tail heat dissipation or decreased BAT activity, may at least in part contribute to this hypothermia. PAF and histamine are involved mainly in hypotension but only partly in hypothermia during rat anaphylaxis.NEW & NOTEWORTHY Anaphylactic shock is a life-threatening systemic hypotension. Hypothermia is observed during systemic anaphylaxis of rats. We determined the mechanism as follows: decreased locomotor activity, but not tail heat dissipation or decreased BAT activity, may at least in part contribute to this hypothermia. PAF and histamine are involved mainly in hypotension, but only partly in hypothermia during rat anaphylaxis.
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Affiliation(s)
| | - Munenori Ono
- Department of Physiology I, Kanazawa Medical University, Ishikawa, Japan
| | - Mamoru Tanida
- Department of Physiology II, Kanazawa Medical University, Ishikawa, Japan
| | - Yuhichi Kuda
- Department of Physiology II, Kanazawa Medical University, Ishikawa, Japan
| | - Yasutaka Kurata
- Department of Physiology II, Kanazawa Medical University, Ishikawa, Japan
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Turner PJ, Ruiz‐Garcia M, Patel N, Abrantes G, Burrell S, Vazquez‐Ortiz M, Skypala I, Durham SR, Boyle RJ. Delayed symptoms and orthostatic intolerance following peanut challenge. Clin Exp Allergy 2021; 51:696-702. [DOI: 10.1111/cea.13865] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 02/21/2021] [Accepted: 03/04/2021] [Indexed: 01/27/2023]
Affiliation(s)
- Paul J. Turner
- National Heart & Lung Institute Imperial College London London UK
| | | | - Nandinee Patel
- National Heart & Lung Institute Imperial College London London UK
| | - Gonçalo Abrantes
- National Heart & Lung Institute Imperial College London London UK
| | - Sarah Burrell
- National Heart & Lung Institute Imperial College London London UK
| | | | - Isabel Skypala
- Royal Brompton and Harefield Hospitals NHS Foundation Trust London UK
| | - Stephen R. Durham
- National Heart & Lung Institute Imperial College London London UK
- Royal Brompton and Harefield Hospitals NHS Foundation Trust London UK
| | - Robert J. Boyle
- National Heart & Lung Institute Imperial College London London UK
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Zhang T, Shibamoto T, Tanida M, Kuda Y, Yang W, Kurata Y. Tonic contraction develops in the colon during anaphylactic hypotension in anesthetized rats. J Physiol Sci 2019; 69:953-960. [PMID: 31542858 PMCID: PMC11057062 DOI: 10.1007/s12576-019-00710-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 09/04/2019] [Indexed: 11/26/2022]
Abstract
Diarrhea is a gastrointestinal symptom associated with systemic anaphylaxis and could be induced by increased colonic motility. We determined colonic motility and expulsion by measuring the intracolonic pressure (ICP) and expelled fluid weight in anesthetized rats during anaphylactic hypotension. Substantial systemic hypotension occurred in every sensitized rat after antigen injection. One min after antigen injection, ICP began to increase and remained elevated for 5 min, which was revealed to represent tonic contraction by the video-recording procedure, and was accompanied by increased colonic fluid expulsion. Parasympathectomy composed of subdiaphragmatic vagotomy combined with pelvic nerve transection reduced the duration of the tonic contraction, but not expelled colonic fluid. Furthermore, denervation of afferent parasympathetic nerves produced essentially the same effect as parasympathectomy. Sympathectomy did not significantly change any parameters. In conclusion, the colonic motility during anaphylactic hypotension is characterized by 5-min lasting tonic contraction which is associated with increased colonic fluid expulsion and is involved by parasympathetic nerves, especially their afferents, but not sympathetic nerves, in anesthetized rats.
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Affiliation(s)
- Tao Zhang
- Department of Physiology II, Kanazawa Medical University, Uchinada, 920-0293, Japan
- Department of Colorectal and Hernia Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, China
| | - Toshishige Shibamoto
- Department of Physiology II, Kanazawa Medical University, Uchinada, 920-0293, Japan.
| | - Mamoru Tanida
- Department of Physiology II, Kanazawa Medical University, Uchinada, 920-0293, Japan
| | - Yuhichi Kuda
- Department of Physiology II, Kanazawa Medical University, Uchinada, 920-0293, Japan
| | - Wei Yang
- Department of Physiology II, Kanazawa Medical University, Uchinada, 920-0293, Japan
- Department of Infectious Disease, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Yasutaka Kurata
- Department of Physiology II, Kanazawa Medical University, Uchinada, 920-0293, Japan
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Kuda Y, Tanida M, Chen F, Kurata Y, Shibamoto T. Anaphylaxis stimulates afferent vagal nerve activity and efferent sympathetic nerve activity in the stomach of anesthetized rats. Am J Physiol Regul Integr Comp Physiol 2019; 317:R337-R345. [PMID: 31116019 DOI: 10.1152/ajpregu.00193.2018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Systemic anaphylaxis is a life-threatening and allergic reaction that affects various organs. We previously reported that, in the stomach, gastric vasoconstriction occurring at the late phase (15-55 min after injection of ovalbumin antigen) was observed in anesthetized rats sensitized with ovalbumin. In addition, anaphylaxis enhances gastric motility and delays emptying. However, the role of extrinsic autonomic nervous system on antigen-induced gastric alterations was not known. Thus, using the same rat anaphylaxis model, we aimed to determine the changes in the efferent and afferent autonomic nerve activities in the stomach during anaphylactic hypotension. The findings showed that injection of ovalbumin antigen caused substantial systemic hypotension in all sensitized rats. The efferent gastric sympathetic nerve activity (ef-GSNA), but not the efferent vagal nerve activity, increased only at the early phase (1-10 min after injection of ovalbumin antigen) and showed baroreceptor reflex, as evidenced by a stimulatory response to sodium nitroprusside-induced hypotension. In general, excitation of ef-GSNA could induce pylorus sphincter contraction and gastric vasoconstriction. In the present study, we found that sympathectomy attenuated the anaphylaxis-induced decrease in gastric flux but not the increase in gastric vascular resistance. Thus, the increase in ef-GSNA may cause anaphylactic pylorus sphincter contraction but not anaphylactic gastric vasoconstriction. On the other hand, the afferent gastric vagal nerve activity, but not the afferent sympathetic nerve activity, increased during the early phase of anaphylactic hypotension. However, vagotomy produced no effects on the anaphylactic gastric dysfunction. In conclusion, the gastric sympathetic nerves partly modulate stomach function during systemic anaphylaxis.
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Affiliation(s)
- Yuhichi Kuda
- Department of Physiology II, Kanazawa Medical University, Ishikawa, Japan
| | - Mamoru Tanida
- Department of Physiology II, Kanazawa Medical University, Ishikawa, Japan
| | - Fu Chen
- Department of Physiology II, Kanazawa Medical University, Ishikawa, Japan.,Department of General Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Yasutaka Kurata
- Department of Physiology II, Kanazawa Medical University, Ishikawa, Japan
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Mukai K, Kuda Y, Shibamoto T, Tanida M, Kurata Y, Yokoyama H. Renal response to anaphylaxis in anesthetized rats and isolated perfused rat kidneys: roles of nitric oxide. J Physiol Sci 2018; 68:689-697. [PMID: 29209891 PMCID: PMC10717926 DOI: 10.1007/s12576-017-0583-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 11/24/2017] [Indexed: 11/30/2022]
Abstract
We determined the renal responses to anaphylaxis and the effects of a nitric oxide synthesis inhibitor, L-NAME, in anesthetized rats and isolated perfused rat kidneys. After the ovalbumin antigen injection, the sensitized rats showed transient and substantial decreases in mean blood pressure and renal blood flow and an increase in renal vascular resistance. Creatinine clearance, a measure of renal function, decreased to 53% baseline at 2 h after antigen. L-NAME pretreatment significantly enhanced the antigen-induced renal vasoconstriction and renal dysfunction. Moreover, plasma creatinine levels significantly increased only in the L-NAME pretreated rats. Separately, in isolated perfused kidneys, we observed the antigen-induced renal vasoconstriction and its augmentation by L-NAME. In conclusion, the renal vascular response to the antigen is vasoconstriction, which is enhanced by L-NAME in both isolated perfused rat kidneys and anesthetized rats; it is accompanied by renal dysfunction, which is also augmented by L-NAME.
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Affiliation(s)
- Kiyotaka Mukai
- Department of Nephrology, Kanazawa Medical University, Ishikawa, 920-0293, Japan
| | - Yuhichi Kuda
- Department of Physiology II, Kanazawa Medical University, Ishikawa, 920-0293, Japan
| | - Toshishige Shibamoto
- Department of Physiology II, Kanazawa Medical University, Ishikawa, 920-0293, Japan.
| | - Mamoru Tanida
- Department of Physiology II, Kanazawa Medical University, Ishikawa, 920-0293, Japan
| | - Yasutaka Kurata
- Department of Physiology II, Kanazawa Medical University, Ishikawa, 920-0293, Japan
| | - Hitoshi Yokoyama
- Department of Nephrology, Kanazawa Medical University, Ishikawa, 920-0293, Japan
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