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da Silva GN, Seiffert N, Tovote P. Cerebellar contribution to the regulation of defensive states. Front Syst Neurosci 2023; 17:1160083. [PMID: 37064160 PMCID: PMC10102664 DOI: 10.3389/fnsys.2023.1160083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 03/15/2023] [Indexed: 04/03/2023] Open
Abstract
Despite fine tuning voluntary movement as the most prominently studied function of the cerebellum, early human studies suggested cerebellar involvement emotion regulation. Since, the cerebellum has been associated with various mood and anxiety-related conditions. Research in animals provided evidence for cerebellar contributions to fear memory formation and extinction. Fear and anxiety can broadly be referred to as defensive states triggered by threat and characterized by multimodal adaptations such as behavioral and cardiac responses integrated into an intricately orchestrated defense reaction. This is mediated by an evolutionary conserved, highly interconnected network of defense-related structures with functional connections to the cerebellum. Projections from the deep cerebellar nucleus interpositus to the central amygdala interfere with retention of fear memory. Several studies uncovered tight functional connections between cerebellar deep nuclei and pyramis and the midbrain periaqueductal grey. Specifically, the fastigial nucleus sends direct projections to the ventrolateral PAG to mediate fear-evoked innate and learned freezing behavior. The cerebellum also regulates cardiovascular responses such as blood pressure and heart rate-effects dependent on connections with medullary cardiac regulatory structures. Because of the integrated, multimodal nature of defensive states, their adaptive regulation has to be highly dynamic to enable responding to a moving threatening stimulus. In this, predicting threat occurrence are crucial functions of calculating adequate responses. Based on its role in prediction error generation, its connectivity to limbic regions, and previous results on a role in fear learning, this review presents the cerebellum as a regulator of integrated cardio-behavioral defensive states.
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Affiliation(s)
- Gabriela Neubert da Silva
- Defense Circuits Lab, Institute of Clinical Neurobiology, University Hospital Würzburg, Würzburg, Germany
| | - Nina Seiffert
- Defense Circuits Lab, Institute of Clinical Neurobiology, University Hospital Würzburg, Würzburg, Germany
| | - Philip Tovote
- Defense Circuits Lab, Institute of Clinical Neurobiology, University Hospital Würzburg, Würzburg, Germany
- Center for Mental Health, University Hospital Würzburg, Würzburg, Germany
- *Correspondence: Philip Tovote,
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Palozi RAC, Lorençone BR, Guarnier LP, Romão PVM, Marques AAM, Hulsmeyer APCR, Lourenço ELB, Tolouei SEL, da Silva GN, Curi TZ, Passoni MT, Dalsenter PR, de Araújo FHS, Oesterreich SA, Souza RIC, Dos Santos AC, de Castilho PF, de Oliveira KMP, Nocchi SR, Silva DB, Gasparotto Junior A. From general toxicology to DNA disruption: A safety assessment of Plinia cauliflora (Mart.) Kausel. J Ethnopharmacol 2020; 258:112916. [PMID: 32360045 DOI: 10.1016/j.jep.2020.112916] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/14/2020] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Plinia cauliflora (Mart.) Kausel (Myrtaceae) is popularly known as "jaboticaba" or "jaboticaba". The fruit is appreciated for both fresh consumption and the manufacture of jelly, juice, ice cream, fermented beverages, and liqueurs. The more widespread traditional use of the plant involves the treatment of diarrhea, which utilizes all parts of the plant, including the fruit peels. AIM OF THE STUDY We sought to elucidate possible risks of the administration of an ethanol-soluble fraction that was obtained from an infusion of P. cauliflora fruit peels (SEIPC). We performed a series of experiments to evaluate possible toxicity, in which we administered SEIPC orally both acutely and repeatedly for 28 days. We also evaluated possible endocrine-disruptive and genotoxic effects in eukaryotic cells. The possible mutagenic activity of SEIPC was evaluated using reverse mutation (Ames) assays. MATERIALS AND METHODS SEIPC was produced and chemically characterized by LC-DAD-MS. Acute toxicity and behavioral and physiological alterations were evaluated in the modified Irwin test. Respiratory rate, arterial blood gas, electrocardiography, respiratory rate, heart rate, and blood pressure were evaluated, and hematological, biochemical, and histopathological analyses were performed after 28 days of oral treatment. The comet assay, mammalian erythrocyte micronucleus test, uterotrophic test, Hershberger bioassay, and AMES test were performed using appropriate protocols. RESULTS From SEIPC, ellagic acid and derivatives, flavonols and anthocyanidins, as well as citric acid and gallic acid, were annotated by LC-DAD-MS. We did not observed any significant toxic effects after acute or prolonged SEIPC treatment. No endocrine-disruptive or mutagenic effects were observed. CONCLUSIONS The present study found that SEIPC did not cause any significant alterations of various corporeal systems, including cardiac electrical activity, body temperature, respiratory rate, and arterial pressure. No alterations of biochemical, hematological, or blood gas parameters were observed. SEIPC did not cause any perturbations of the endocrine system or mutagenic, cytotoxic, or genotoxic effects. These findings substantiate the safe clinical use of P. cauliflora.
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Affiliation(s)
- Rhanany Alan Calloi Palozi
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Bethânia Rosa Lorençone
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Lucas Pires Guarnier
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Paulo Vitor Moreira Romão
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Aline Aparecida Macedo Marques
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | | | | | | | | | - Tatiana Zauer Curi
- Laboratory of Reproductive Toxicology, Federal University of Paraná, Curitiba, PR, Brazil
| | | | | | - Flávio Henrique Souza de Araújo
- Laboratory of Toxicological Assays - LETOX, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Silvia Aparecida Oesterreich
- Laboratory of Toxicological Assays - LETOX, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Roosevelt Isaias Carvalho Souza
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Ariany Carvalho Dos Santos
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Pamella Fukuda de Castilho
- Laboratory of Applied Microbiology, Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Kelly Mari Pires de Oliveira
- Laboratory of Applied Microbiology, Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Samara Requena Nocchi
- Laboratório de Produtos Naturais e Espectrometria de Massas (LaPNEM), Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição (FACFAN), Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Denise Brentan Silva
- Laboratório de Produtos Naturais e Espectrometria de Massas (LaPNEM), Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição (FACFAN), Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Arquimedes Gasparotto Junior
- Laboratory of Electrophysiology and Cardiovascular Pharmacology - LEFaC, Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil.
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Neubert da Silva G, Zauer Curi T, Lima Tolouei SE, Tapias Passoni M, Sari Hey GB, Marino Romano R, Martino-Andrade AJ, Dalsenter PR. Effects of diisopentyl phthalate exposure during gestation and lactation on hormone-dependent behaviours and hormone receptor expression in rats. J Neuroendocrinol 2019; 31:e12816. [PMID: 31758603 DOI: 10.1111/jne.12816] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 12/28/2022]
Abstract
Phthalates are found in different plastic materials, such as packaging, toys and medical devices. Some of these compounds are endocrine disruptors, comprising substances that are able to induce multiple hormonal disturbances and downstream developmental effects, including the disruption of androgen-dependent differentiation of the male reproductive tract and changes in pathways that regulate hormone-dependent behaviours. In a previous study, metabolites of diisopentyl phthalate (DiPeP), a potent anti-androgenic phthalate, were found in the urine of Brazilian pregnant women. Therefore, the present study aimed to evaluate the effects of DiPeP exposure during critical developmental periods on behaviours controlled by sex hormones in rats. Pregnant Wistar rats were treated with DiPeP (1, 10 or 100 mg kg day-1 ) or canola oil by oral gavage between gestational day 10 and post-natal day (PND) 21. Male offspring were tested in a behavioural battery, including the elevated plus maze task, play behaviour, partner preference and sexual behaviour. After the behavioural tests, the hypothalamus and pituitary of these animals were removed on PND 60-65 and PND 145-160 to quantify gene expression for aromatase, androgen receptor (Ar) and oestrogen receptors α (Esr1) and β (Esr2). Male rats exposed to 1 and 10 mg kg day-1 DiPeP displayed no preference for the female stimulus rat in the partner preference test and 1 mg kg day-1 DiPeP rats also showed a significant increase in mount and penetration latencies when mated with receptive females. A decrease in pituitary Esr1 expression was observed in all DiPeP treated groups regardless of age. A reduction in hypothalamic Esr1 expression in rats exposed to 10 mg kg day-1 DiPeP was also observed. No significant changes were found with respect to Ar, Esr2 and aromatase expression in the hypothalamus. These results suggest that DiPeP exposure during critical windows of development in rats may induce changes in behaviours related to mating and the sexual motivation of males.
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Curi TZ, Neubert da Silva G, Passoni MT, Lima Tolouei SE, Meldola H, Romano RM, Grechi N, Dalsenter PR, Martino-Andrade AJ. In utero and lactational exposure to diisopentyl phthalate (DiPeP) induces fetal toxicity and antiandrogenic effects in rats. Toxicol Sci 2019; 171:347-358. [PMID: 31368500 DOI: 10.1093/toxsci/kfz159] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 07/10/2019] [Accepted: 07/15/2019] [Indexed: 12/20/2022] Open
Abstract
A previous study has demonstrated exposure of Brazilian pregnant women to Diisopentyl phthalate (DiPeP), which reduces fetal rat testosterone production in a dose-responsive manner. In this study we examined gene expression of steroidogenic proteins in rat fetal testes and investigated the effects of in utero and lactational DiPeP exposure on male rat reproductive development and function. For the prenatal experiment, we orally exposed pregnant Wistar rats to DiPeP or Di-n-butyl phthalate (reference phthalate) at 0, 125, 250, and 500 mg/kg/day from gestation day 14-18 and the fetal testis was evaluated for transcript expression of Star, Cyp11a1, Cyp17a1, Cyp19a1, Insl3, Ar, Esr1, Esr2 and Gper1 by RT-q PCR. DiPeP lowered mRNA levels of key steroidogenic proteins, lending support to the previously reported reductions in fetal testosterone production. DiPeP also lowered fetal testis transcript levels of Insl3 and changed gene expression of some steroid hormones receptors. Signs of fetal toxicity were observed at the highest dose. For the postnatal experiment pregnant rats were exposed orally to vehicle (canola oil) and four DiPeP doses (1, 10, 100 and 300 mg/kg/day) between gestation day 10 and post-natal day 21. DiPeP induced a range of reproductive and antiandrogenic effects that are typical of the rat phthalate syndrome, including reduced anogenital distance at the highest dose, reduced weight of seminal vesicles at 10 mg/kg/day and above, and testicular morphological and functional changes. Together, our results indicate that DiPeP, a compound relevant to the human exposure scenario, is one of the most active antiandrogenic phthalates.
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Affiliation(s)
- Tatiana Zauer Curi
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
- Animal Endocrine and Reproductive Physiology Laboratory, Department of Physiology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
| | - Gabriela Neubert da Silva
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
- Animal Endocrine and Reproductive Physiology Laboratory, Department of Physiology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
| | - Marcella Tapias Passoni
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
| | - Sara Emilia Lima Tolouei
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
| | - Heloísa Meldola
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
| | - Renata Marino Romano
- Laboratory of Reproductive Toxicology, Department of Pharmacy, State University of Centro-Oeste, Guarapuava, PR 85040-080, Brazil
| | - Nicole Grechi
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
| | - Paulo Roberto Dalsenter
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
| | - Anderson Joel Martino-Andrade
- Reproductive Toxicology Laboratory, Department of Pharmacology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
- Animal Endocrine and Reproductive Physiology Laboratory, Department of Physiology, Federal University of Paraná (UFPR), Curitiba, PR 81531-980, Brazil
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