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Sikiric P, Boban Blagaic A, Krezic I, Zizek H, Kalogjera L, Smoday IM, Vukovic V, Oroz K, Chiddenton HM, Buric S, Antunovic M, Gojkovic S, Strbe S, Skocic M, Sikiric S, Milavic M, Beketic Oreskovic L, Kokot A, Koprivanac A, Dobric I, Sever M, Staresinic M, Batelja Vuletic L, Skrtic A, Seiwerth S. From Selye's and Szabo's Cysteamine-Duodenal Ulcer in Rats to Dopamine in the Stomach: Therapy Significance and Possibilities. Pharmaceuticals (Basel) 2023; 16:1699. [PMID: 38139825 PMCID: PMC10748240 DOI: 10.3390/ph16121699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/30/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
We reviewed gastric ulcer healing by dopamine considering several distinctive duodenal key points. Selye and Szabo describe the cysteamine-induced duodenal ulcer in rats as a duodenal stress ulcer in patients. Szabo's cysteamine duodenal ulcer as the dopamine duodenal healing and cysteamine as a dopamine antagonist signifies the dopamine agonists anti-ulcer effect and dopamine antagonists ulcerogenic effect. From these viewpoints, we focused on dopamine and gastric ulcer healing. We mentioned antecedent studies on the dopamine presence in the stomach and gastric juice. Then we reviewed, in the timeline, therapy significance arising from the anti-ulcer potency of the various dopamine agonists, which is highly prevailing over the quite persistent beneficial evidence arising from the various dopamine antagonists. Meanwhile, the beneficial effects of several peptides (i.e., amylin, cholecystokinin, leptin, and stable gastric pentadecapeptide BPC 157, suggested as an acting mediator of the dopamine brain-gut axis) were included in the dopamine gastric ulcer story. We attempt to resolve dopamine agonists/antagonists issue with the dopamine significance in the stress (cysteamine as a prototype of the duodenal stress ulcer), and cytoprotection (cysteamine in small dose as a prototype of the cytoprotective agents; cysteamine duodenal ulcer in gastrectomized rats). Thereby, along with dopamine agonists' beneficial effects, in special circumstances, dopamine antagonists having their own ulcerogenic effect may act as "mild stress (or)" or "small irritant" counteracting subsequent strong alcohol or stress procedure-induced severe lesions in this particular tissue. Finally, in the conclusion, as a new improvement in further therapy, we emphasized the advantages of the dopamine agents' application in lower gastrointestinal tract therapy.
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Affiliation(s)
- Predrag Sikiric
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Alenka Boban Blagaic
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Ivan Krezic
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Helena Zizek
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Luka Kalogjera
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Ivan Maria Smoday
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Vlasta Vukovic
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Katarina Oroz
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Helen Marie Chiddenton
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Sara Buric
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Marko Antunovic
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Slaven Gojkovic
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Sanja Strbe
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Milena Skocic
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Suncana Sikiric
- Department of Pathology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (S.S.); (M.M.); (L.B.V.); (S.S.)
| | - Marija Milavic
- Department of Pathology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (S.S.); (M.M.); (L.B.V.); (S.S.)
| | - Lidija Beketic Oreskovic
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Antonio Kokot
- Department of Anatomy and Neuroscience, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia;
| | - Antun Koprivanac
- Department of Pharmacology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.B.B.); (I.K.); (H.Z.); (L.K.); (I.M.S.); (V.V.); (K.O.); (H.M.C.); (S.B.); (S.G.); (S.S.); (M.S.); (L.B.O.); (A.K.)
| | - Ivan Dobric
- Department of Surgery, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (I.D.); (M.S.)
| | - Marko Sever
- Department of Surgery, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (I.D.); (M.S.)
| | - Mario Staresinic
- Department of Surgery, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (I.D.); (M.S.)
| | - Lovorka Batelja Vuletic
- Department of Pathology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (S.S.); (M.M.); (L.B.V.); (S.S.)
| | - Anita Skrtic
- Department of Pathology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (S.S.); (M.M.); (L.B.V.); (S.S.)
| | - Sven Seiwerth
- Department of Pathology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (S.S.); (M.M.); (L.B.V.); (S.S.)
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Wang K, Yuan K, Li R, Lin F, Chen Y, Yang J, Han H, Li T, Jia Y, Zhou Y, Zhang H, Li R, Li Z, Zhao Y, Hao Q, Chen X, Zhao Y. Prediction of stress-related gastrointestinal bleeding in patients with aneurysmal subarachnoid hemorrhage using caudate Hounsfield unit value in ASPECT score. Front Neurol 2023; 14:1237310. [PMID: 37780721 PMCID: PMC10533991 DOI: 10.3389/fneur.2023.1237310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 08/14/2023] [Indexed: 10/03/2023] Open
Abstract
Background Stress-related gastrointestinal bleeding (SRGB) is one of the major complications after aneurysmal subarachnoid hemorrhage (aSAH), and it can present challenges in patient care and treatment. The aim of this study was to explore the clinical significance of the caudate Hounsfield unit (HU) value in the Alberta Stroke Program Early CT (ASPECT) score for predicting SRGB in patients with aSAH. Methods We retrospectively analyzed the data of 531 aSAH patients admitted to our institution between 2019 and 2022. Potential predictors of SRGB were identified using multivariate Cox regression analysis. We used a restricted cubic spline (RCS) to evaluate whether there is a nonlinear relationship between the right caudate HU value and SRGB. MaxStat analysis (titled as maximally selected rank statistics) was performed to identify the optimal cutoff point for the right caudate HU value. Another Kaplan-Meier method with the log-rank test was used to analyze the right caudate HU value in predicting the occurrence of SRGB. Results The incidence rate of SRGB was 17.9%. In the multivariate Cox regression analysis, the right caudate HU value was an independent predictor of SRGB [Hazard ratio (HR) = 0.913; 95% confidence interval (CI): 0.847-0.983, and p = 0.016]. The RCS indicated that the incidence of developing SRGB reduces with increasing right caudate HU values (nonlinear p = 0.78). The optimal cut-off value of the right caudate HU was 25.1. Conclusion Among aSAH patients, lower right caudate HU values indicated a higher risk of developing SRGB. Our findings provide further evidence for the relationship between the gastrointestinal system and the brain.
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Affiliation(s)
- Ke Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Kexin Yuan
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Runting Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Fa Lin
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yu Chen
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jun Yang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Heze Han
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Tu Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yitong Jia
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yunfan Zhou
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Haibin Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Ruinan Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhipeng Li
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yahui Zhao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Qiang Hao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Stroke Center, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, China
| | - Xiaolin Chen
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Stroke Center, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, China
| | - Yuanli Zhao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Stroke Center, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
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Messias E, Saini A, Sinato P, Welch S. Bearing grudges and physical health: relationship to smoking, cardiovascular health and ulcers. Soc Psychiatry Psychiatr Epidemiol 2010; 45:183-7. [PMID: 19387519 DOI: 10.1007/s00127-009-0054-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Accepted: 04/01/2009] [Indexed: 10/20/2022]
Abstract
BACKGROUND Personality traits are reported to be associated with a variety of medical comorbidities. Correlational studies report an association between 'bearing grudges' and medical conditions. We hypothesize persons reporting "bearing grudges for years" would be more likely to have medical comorbidities and test this hypothesis in an epidemiological sample. METHODS The National Comorbidity Survey Replication is a probability sample of the US population designed to constitute a nationally representative sample (N = 9,882). Associations were measured in odds ratios (95% CI) and adjusted using logistic regression. Confounders included: gender, age, race, and smoking status. We tested the hypothesis on 14 following medical conditions: heart disease, high blood pressure, history of heart attack, asthma, diabetes, cancer, epilepsy, arthritis, neck problems, headaches, stroke, and ulcers. Significance levels were adjusted for multiple comparisons using the Bonferoni procedure. RESULTS Positive and statistically significant associations were found, after adjusting for confounders and correcting for multiple comparisons, between bearing grudges and history of heart attack (odds ratio 2.1, 95% CI 1.5-2.9) and disease (1.6, 1.2-2.2); high blood pressure (1.5, 1.3-1.7), stomach ulcers (1.6, 1.3-1.9); arthritis (1.5, 1.3-1.9); back problems (1.6, 1.4-1.8); headaches (1.8, 1.6-2.1); and chronic pain (1.7, 1.4-2.1). No association was found with history of asthma, diabetes, epilepsy, allergies, stroke, and cancer. CONCLUSIONS In a population-based survey, bearing grudges is associated with a history of pain disorders, cardiovascular disease, and stomach ulcers. These results point to the importance of psychosomatic research in medical settings.
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Affiliation(s)
- Erick Messias
- Department of Psychiatry, Medical College of Georgia, Georgia, USA.
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Dursun H, Bilici M, Albayrak F, Ozturk C, Saglam MB, Alp HH, Suleyman H. Antiulcer activity of fluvoxamine in rats and its effect on oxidant and antioxidant parameters in stomach tissue. BMC Gastroenterol 2009; 9:36. [PMID: 19457229 PMCID: PMC2693117 DOI: 10.1186/1471-230x-9-36] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Accepted: 05/20/2009] [Indexed: 01/11/2023] Open
Abstract
Background Although many drugs are available for the treatment of gastric ulcers, often these drugs are ineffective. Many antidepressant drugs have been shown to have antiulcer activity in various models of experimental ulcer. One such drug, the antidepressant mirtazapine, has been reported to have an antiulcer effect that involves an increase in antioxidant, and a decrease in oxidant, parameters. To date, however, there is no information available regarding the antiulcer activity for a similar antidepressant, fluvoxamine. This study aimed to investigate the antiulcer effects of fluvoxamine and to determine its relationship with antioxidants. Methods Groups of rats fasted for 24 h received fluvoxamine (25, 50, 100 and 200 mg/kg), ranitidine (50 mg/kg) or distilled water by oral gavage. Indomethacin (25 mg/kg) was orally administered to the rats as an ulcerative agent. Six hours after ulcer induction, the stomachs of the rats were excised and an ulcer index determined. Separate groups of rats were treated with the same doses of fluvoxamine and ranitidine, but not with indomethacin, to test effects of these drugs alone on biochemical parameters. The stomachs were evaluated biochemically to determine oxidant and antioxidant parameters. We used one-way ANOVA and least significant difference (LSD) options for data analysis. Results The 25, 50, 100 and 200 mg/kg doses of fluvoxamine exerted antiulcer effects of 48.5, 67.5, 82.1 and 96.1%, respectively, compared to the control rat group. Ranitidine showed an 86.5% antiulcer effect. No differences were observed in the absence of indomethacin treatment for any dose of fluvoxamine or for ranitidine. The levels of antioxidant parameters, total glutathione and nitric oxide, were increased in all fluvoxamine groups and in the ranitidine group when compared with the indomethacin-only group. In addition, fluvoxamine and ranitidine decreased the levels of the oxidant parameters, myeloperoxidase and malondialdeyhyde, in the stomach tissues of the rats when compared to indomethacin group. Conclusion We conclude that fluvoxamine has antiulcer effects, and that these occur by a mechanism that involves activation of antioxidant parameters and inhibition of some toxic oxidant parameters.
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Affiliation(s)
- Hakan Dursun
- Department of Pharmacology, Ataturk University, Faculty of Medicine, Erzurum, Turkey.
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Gabry KE, Chrousos GP, Rice KC, Mostafa RM, Sternberg E, Negrao AB, Webster EL, McCann SM, Gold PW. Marked suppression of gastric ulcerogenesis and intestinal responses to stress by a novel class of drugs. Mol Psychiatry 2002; 7:474-83, 433. [PMID: 12082565 DOI: 10.1038/sj.mp.4001031] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2001] [Revised: 09/24/2001] [Accepted: 10/13/2001] [Indexed: 01/23/2023]
Abstract
When exposed to prolonged stress, rats develop gastric ulceration, enhanced colon motility with depletion of its mucin content and signs of physiological and behavioral arousal. In this model, we tested whether antidepressants (fluoxetine and bupropion), anxiolytics (diazepam and buspirone) or the novel nonpeptide corticotropin-releasing hormone (CRH) type-1 receptor (CRH-R1) antagonist, antalarmin, modify these responses. Fluoxetine, bupropion, diazepam and antalarmin all suppressed stress-induced gastric ulceration in male Sprague-Dawley rats exposed to four hours of plain immobilization. Antalarmin produced the most pronounced anti-ulcer effect and additionally suppressed the stress-induced colonic hypermotility, mucin depletion, autonomic hyperarousal and struggling behavior. Intraperitoneal CRH administration reproduced the intestinal but not the gastric responses to stress while vagotomy antagonized the stress-induced gastric ulceration but not the intestinal responses. We conclude that brain CRH-R1 and vagal pathways are essential for gastric ulceration to occur in response to stress and that peripheral CRH-R1 mediates colonic hypermotility and mucin depletion in this model. Nonpeptide CRH-R1 antagonists may therefore be prophylactic against stress ulcer in the critically ill and therapeutic for other pathogenetically related gastrointestinal disorders such as peptic ulcer disease and irritable bowel syndrome.
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Affiliation(s)
- K E Gabry
- Clinical Neuroendocrinology Branch, National Institute of Mental Health, Intramural Research Program, National Institutes of Health, Bethesda, MD 20892-11284, USA
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Sandbak T, Murison R, Sarviharju M, Hyytia P. Defensive Burying and Stress Gastric Erosions in Alcohol-Preferring AA and Alcohol-Avoiding ANA Rats. Alcohol Clin Exp Res 1998. [DOI: 10.1111/j.1530-0277.1998.tb05915.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kõks S, Vasar E, Soosaar A, Lang A, Volke V, Võikar V, Bourin M, Männistö PT. Relation of exploratory behavior of rats in elevated plus-maze to brain receptor binding properties and serum growth hormone levels. Eur Neuropsychopharmacol 1997; 7:289-94. [PMID: 9443661 DOI: 10.1016/s0924-977x(97)00034-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Forty-five male Wistar rats were selected according to their behavior in the elevated plus-maze. They were separated as follows: animals with low exploratory activity ('anxious'), an 'intermediate' group and animals having high exploratory activity ('non-anxious'). Various receptor binding studies and hormonal assays were also performed in these selected rats. The affinity of 5-hydroxytryptamine 5-HT2A receptors in the frontal cortex was lower in the 'anxious' rats compared to home-cage controls and 'non-anxious' animals. Moreover, the number of cholecystokinin (CCK) receptors in the hippocampus was significantly elevated in the 'anxious' group compared to home-cage control animals. The blood levels of growth hormone (GH) were significantly lower in the 'non-anxious' rats compared to 'anxious' counterparts. In conclusion, it seems likely that the decreased exploratory activity of rats is related to the increased 5-hydroxytryptamine (5-HT) and CCK mediated neurotransmission in the brain. The different serum levels of GH in the selected rats probably reflect alterations in the activity of 5-HT and CCK.
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Affiliation(s)
- S Kõks
- Department of Physiology, University of Tartu, Estonia.
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Overmier JB, Murison R, Johnsen TB. Prediction of individual vulnerability to stress-induced gastric ulcerations in rats: a factor analysis of selected behavioral and biological indices. Physiol Behav 1997; 61:555-62. [PMID: 9108575 DOI: 10.1016/s0031-9384(96)00502-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Fifty rats were subjected seriatim to 6 different test tasks (open-field, startle, drug-induced sterotypy, oral finickiness, defensive burying, and memory for aversive event). This yielded 12 test-specific plus 2 general biobehavioral measures (growth and defecation). These 14 measures were subjected to factor analysis to determine if these measured tapped a common construct of "emotionality." The data yielded a 4-factor structure of Finickiness, Defensiveness, Startle-Sensitivity, and Dopaminergic-Sensitivity that accounted for 62% of the variance. Then, all rats were subjected to restraint-in-water stress to induce gastric ulcerations. Multivariate techniques tested if there was a factor or factor-structure that could predict individual differences in vulnerability to the stress-induced gastric ulcerations. Only the Dopaminergic-Sensitivity factor predicted ulcerogenic vulnerability, and its predictive power resided substantially in the latency to initiate stereotypic gnawing induced by apomorphine. This single test score correlated with amount of ulcer (r = +0.52), accounting for 25% of the variance in ulcer, suggesting that 1. prescreening rats on this variable could be a tool for reducing intrastrain experimental variance in future studies of treatments that modulate ulcerogenicity, and 2. the dopaminergic system may be intimately involved in the causal path of ulcerogenicity.
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Affiliation(s)
- J B Overmier
- Faculty of Psychology, University of Bergen, Norway.
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