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Faron-Górecka A, Kuśmider M, Solich J, Kolasa M, Pabian P, Gruca P, Romańska I, Żurawek D, Szlachta M, Papp M, Antkiewicz-Michaluk L, Dziedzicka-Wasylewska M. Regulation of somatostatin receptor 2 in the context of antidepressant treatment response in chronic mild stress in rat. Psychopharmacology (Berl) 2018; 235:2137-2149. [PMID: 29713785 PMCID: PMC6015609 DOI: 10.1007/s00213-018-4912-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 04/17/2018] [Indexed: 12/11/2022]
Abstract
RATIONALE The role of somatostatin and its receptors for the stress-related neuropsychiatric disorders has been widely raised. Recently, we have also demonstrated the involvement of somatostatin receptor type 2-sst2R and dopamine receptor type 2-D2R in stress. OBJECTIVE In this context, we decided to find if these receptors are involved in response to antidepressant treatment in animal model of depression-chronic mild stress (CMS). METHODS Here, we report data obtained following 7-week CMS procedure. The specific binding of [125I]Tyr3-Octreotide to sst2R and [3H]Domperidone to D2R was measured in the rat brain, using autoradiography. Additionally, the level of dopamine and metabolites was measured in the rat brain. RESULTS In the final baseline test after 7 weeks of stress, the reduced consumption of sucrose solution was observed (controls vs the stressed animals (6.25 0.16 vs. 10.39 0.41; p < 0.05). Imipramine was administered for the next 5 weeks, and it reversed anhedonia in majority of animals (imipramine-reactive); however, in some animals, it did not (imipramine-non-reactive). Two-way repeated measures ANOVA revealed significant effects of stress and treatment and time interaction [F(16, 168) = 3.72; p < 0.0001], n = 10 per groups. We observed decreased binding of [125I]Tyr3-Octreotide in most of rat brain regions in imipramine non-reactive groups of animals. The decrease of D2R after stress in striatum and nucleus accumbens and no effect of imipramine were observed. In the striatum and prefrontal cortex, the significant role of stress and imipramine in dopamine levels was observed. CONCLUSIONS The results obtained in binding assays, together with dopamine level, indicate the involvement of sst2R receptors for reaction to antidepressant treatment. Besides, the stress context itself changes the effect of antidepressant drug.
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Affiliation(s)
- Agata Faron-Górecka
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland.
| | - Maciej Kuśmider
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Joanna Solich
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Magdalena Kolasa
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Paulina Pabian
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Piotr Gruca
- Department of Pharmacology, Laboratory of Behavioral Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Irena Romańska
- Department of Neurochemistry, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Dariusz Żurawek
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Marta Szlachta
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Mariusz Papp
- Department of Pharmacology, Laboratory of Behavioral Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Lucyna Antkiewicz-Michaluk
- Department of Neurochemistry, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
| | - Marta Dziedzicka-Wasylewska
- Department of Pharmacology, Laboratory of Biochemical Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna Street 12, 31-343, Kraków, Poland
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