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Gomez R, Caletti G, Arbo BD, Hoefel AL, Schneider R, Hansen AW, Pulcinelli RR, Freese L, Bandiera S, Kucharski LC, Barros HMT. Acute intraperitoneal administration of taurine decreases the glycemia and reduces food intake in type 1 diabetic rats. Biomed Pharmacother 2018; 103:1028-1034. [PMID: 29710660 DOI: 10.1016/j.biopha.2018.04.131] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 02/28/2018] [Revised: 04/17/2018] [Accepted: 04/17/2018] [Indexed: 10/17/2022] Open
Abstract
Taurine, an amino acid with antioxidant and osmoregulatory properties, has been studied for its possible antidiabetic properties in type 1 and type 2 diabetic animals. In type 2 diabetic mice, taurine decreases blood glucose through increased insulin secretion and insulin receptor sensitization. However, insulin is absent in type 1 diabetic individuals. The aim of this study was to evaluate the effects of taurine on parameters related to the energy balance that could explain the metabolic action of this amino acid in type 1 diabetic rats. Control and streptozotocin-induced diabetic rats received saline or taurine (100 mg/kg/day), intraperitoneally, for 30 days. Parameters such as palatable food intake, gastrointestinal transit rate, serum glucose, insulin, leptin, and glucagon levels were measured 60 min after the last taurine administration. Liver, kidneys, heart, and retroperitoneal fat were dissected and weighted. Glycogen levels were measured in the liver and soleus muscle. Our results showed that acute taurine administration decreased glycemia. It also decreased food intake in diabetic rats, without affecting other metabolic parameters. Altogether, our results suggest that in type 1 diabetic rats, taurine decreases blood glucose by a non-insulin-dependent mechanism. Due to the safety profile of taurine, and its effect on glycemia, this amino acid may help to design new drugs to add benefit to insulin therapy in type 1 diabetic individuals.
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Affiliation(s)
- Rosane Gomez
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil; Programa de Pós-Graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil.
| | - Greice Caletti
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
| | - Bruno Dutra Arbo
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Brazil
| | - Ana Lúcia Hoefel
- Programa de Pós-Graduação em Fisiologia, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Ricardo Schneider
- Programa de Pós-Graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Alana Witt Hansen
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Rianne Remus Pulcinelli
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Luana Freese
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
| | - Solange Bandiera
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Luiz Carlos Kucharski
- Programa de Pós-Graduação em Fisiologia, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Helena Maria Tanhauser Barros
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
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Constant HMRM, Figueiró LR, Signor L, Bisch NK, Barros HMT, Ferigolo M. Tradução, adaptação transcultural e validação de conteúdo da versão em português do Coping Behaviours Inventory (CBI) para a população brasileira. CAD SAUDE PUBLICA 2014; 30:2049-56. [DOI: 10.1590/0102-311x00176513] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 07/30/2014] [Indexed: 11/22/2022] Open
Abstract
Estratégias de coping relacionam-se diretamente com o sucesso de abstinência do uso de álcool. No Brasil não há instrumentos que identifiquem estratégias específicas para usuários de álcool. O objetivo deste estudo foi realizar a tradução, adaptação transcultural e validação de conteúdo do Coping Behaviours Inventory (CBI). Os procedimentos seguiram de tradução e retradução, adaptação transcultural, avaliação de conteúdo e estudo piloto. A versão final em português foi aplicada por telefone a 40 usuários de álcool que buscaram auxílio em um serviço de teleatendimento, o VIVAVOZ. A versão retraduzida aproximou-se da original. Quanto à validação de conteúdo, a maioria dos itens é satisfatória e aceitável. Além disso, a concordância entre os juízes, referente à dimensão teórica, apresentou índice kappa médio igual a 0,666, sendo o nível de concordância considerado substancial. Os resultados são satisfatórios e aceitáveis, o que demonstra que a escala está adequada para investigar as estratégias de coping para usuários de álcool.
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Affiliation(s)
| | | | - Luciana Signor
- Universidade Federal de Ciências da Saúde de Porto Alegre, Brasil
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Souza MF, Couto-Pereira NS, Freese L, Costa PA, Caletti G, Bisognin KM, Nin MS, Gomez R, Barros HMT. Behavioral effects of endogenous or exogenous estradiol and progesterone on cocaine sensitization in female rats. ACTA ACUST UNITED AC 2014; 47:505-14. [PMID: 24878606 PMCID: PMC4086178 DOI: 10.1590/1414-431x20143627] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 03/06/2014] [Indexed: 11/21/2022]
Abstract
Cocaine sensitization is a marker for some facets of addiction, is greater in female rats, and may be influenced by their sex hormones. We compared the modulatory effects of endogenous or exogenous estradiol and progesterone on cocaine-induced behavioral sensitization in 106 female rats. Ovariectomized female rats received progesterone (0.5 mg/mL), estradiol (0.05 mg/mL), progesterone plus estradiol, or the oil vehicle. Sham-operated control females received oil. Control and acute subgroups received injections of saline, while the repeated group received cocaine (15 mg/kg, ip) for 8 days. After 10 days, the acute and repeated groups received a challenge dose of cocaine, after which locomotion and stereotypy were monitored. The estrous cycle phase was evaluated and blood was collected to verify hormone levels. Repeated cocaine treatment induced overall behavioral sensitization in female rats, with increased locomotion and stereotypies. In detailed analysis, ovariectomized rats showed no locomotor sensitization; however, the sensitization of stereotypies was maintained. Only females with endogenous estradiol and progesterone demonstrated increased locomotor activity after cocaine challenge. Estradiol replacement enhanced stereotyped behaviors after repeated cocaine administration. Cocaine sensitization of stereotyped behaviors in female rats was reduced after progesterone replacement, either alone or concomitant with estradiol. The behavioral responses (locomotion and stereotypy) to cocaine were affected differently, depending on whether the female hormones were of an endogenous or exogenous origin. Therefore, hormonal cycling appears to be an important factor in the sensitization of females. Although estradiol increases the risk of cocaine sensitization, progesterone warrants further study as a pharmacological treatment in the prevention of psychostimulant abuse.
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Affiliation(s)
- M F Souza
- Laboratório de Neurociência Comportamental, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - N S Couto-Pereira
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - L Freese
- Laboratório de Neurociência Comportamental, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - P A Costa
- Laboratório de Neurociência Comportamental, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - G Caletti
- Laboratório de Neurociência Comportamental, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - K M Bisognin
- Laboratório de Neurociência Comportamental, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - M S Nin
- Laboratório de Neurociência Comportamental, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - R Gomez
- Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - H M T Barros
- Laboratório de Neurociência Comportamental, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
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Souza MF, Toniazo VM, Frazzon APG, Barros HMT. Influence of progesterone on GAD65 and GAD67 mRNA expression in the dorsolateral striatum and prefrontal cortex of female rats repeatedly treated with cocaine. Braz J Med Biol Res 2010; 42:1068-75. [PMID: 19855903 DOI: 10.1590/s0100-879x2009001100011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2009] [Accepted: 09/24/2009] [Indexed: 11/22/2022] Open
Abstract
Female rats are intensely affected by cocaine, with estrogen probably playing an important role in this effect. Progesterone modulates the GABA system and attenuates the effects of cocaine; however, there is no information about its relevance in changing GABA synthesis pathways after cocaine administration to female rats. Our objective was to investigate the influence of progesterone on the effects of repeated cocaine administration on the isoenzymes of glutamic acid decarboxylase (GAD(65) and GAD(67)) mRNA in brain areas involved in the addiction circuitry. Ovariectomized, intact and progesterone replacement-treated female rats received saline or cocaine (30 mg/kg, ip) acutely or repeatedly. GAD isoenzyme mRNA levels were determined in the dorsolateral striatum (dSTR) and prefrontal cortex (PFC) by RT-PCR, showing that repeated, but not acute, cocaine decreased GADs/beta-actin mRNA ratio in the dSTR irrespective of the hormonal condition (GAD(65): P < 0.001; and GAD(67): P = 0.004). In the PFC, repeated cocaine decreased GAD(65) and increased GAD(67) mRNA ratio (P < 0.05). Progesterone replacement decreased both GAD isoenzymes mRNA ratio after acute cocaine in the PFC (P < 0.001) and repeated cocaine treatment reversed this decrease (P < 0.001). These results suggest that cocaine does not immediately affect GAD mRNA expression, while repeated cocaine decreases both GAD(65) and GAD(67) mRNA in the dSTR of female rats, independently of their hormonal conditions. In the PFC, repeated cocaine increases the expression of GAD isoenzymes, which were decreased due to progesterone replacement.
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Affiliation(s)
- M F Souza
- Laboratório de Psicofarmacologia, Departamento de Farmacologia e Toxicologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
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Nin MS, Salles FB, Azeredo LA, Frazon APG, Gomez R, Barros HMT. Antidepressant effect and changes of GABAA receptor gamma2 subunit mRNA after hippocampal administration of allopregnanolone in rats. J Psychopharmacol 2008; 22:477-85. [PMID: 18308780 DOI: 10.1177/0269881107081525] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The present study aimed to verify the effect of bilateral intra-hippocampus administration of the neurosteroid allopregnanolone (3alpha-hydroxy-5alpha-pregnan-20-one; 3alpha, 5alpha-THP) in the forced swimming test (FST) and in the alpha4 and gamma2 GABA(A) receptor subunits gene expression. Results showed that bilateral intra-hippocampal allopregnanolone administration of 2.5 microg/rat ( P<0.05) reduced immobile behavior and increased climbing behavior in the FST. Overall, for all doses of allopregnanolone tested (1.25, 2.5, 5.0 microg/rat), an increase of gamma2 (P<0.05) GABA(A) subunit mRNA was observed. There was a higher increase in the gamma2 gene expression in the right hemisphere than in the left hemisphere (P<0.01) after allopregnanolone treatment. Intra-hippocampal allopregnanolone did not change the expression of the alpha4 subunits. In conclusion, intra-hippocampal administration of allopregnanolone produces an antidepressant-like effect in the FST at an intermediate dose, confirming the potential of neurosteroids as a new class of antidepressant drugs. Our findings suggest that the gamma2, but not the alpha4 GABA(A) subunit, needs further evaluation to be involved in the antidepressant effect of allopregnanolone in the hippocampus and that there is a hemispheric diversity in the biochemical effect of the drug.
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Affiliation(s)
- M S Nin
- Division of Pharmacology, Fundação Faculdade Federal de Ciências Médicas de Porto Alegre, Sarmento Leite, 245, Porto Alegre, RS Brazil
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Andrade S, Silveira SL, Gomez R, Barros HMT, Ribeiro MFM. Gender differences of acute and chronic administration of dehydroepiandrosterone in rats submitted to the forced swimming test. Prog Neuropsychopharmacol Biol Psychiatry 2007; 31:613-21. [PMID: 17223242 DOI: 10.1016/j.pnpbp.2006.12.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2006] [Revised: 11/21/2006] [Accepted: 12/06/2006] [Indexed: 11/19/2022]
Abstract
Previous pre-clinical and clinical studies investigating the antidepressant potential of DHEA revealed conflicting results. In this study, the effects of exogenous DHEA on performance in the forced swimming test (FST) were examined in male and female Wistar rats in different phases of the estrous cycle. Furthermore, the effects of treatment and of the FST, on corticosterone and DHEA serum levels were investigated. Acute administration of DHEA (2 mg/kg) significantly increased freezing only in proestrus female rats. Similarly, the chronic administration of DHEA (2 mg/kg) increased freezing duration and decreased climbing behavior but only in females in diestrus II compared to those given vehicle. These results demonstrate that chronically administered DHEA induces a depressant-like effect, and this effect is sex dependent. There was no direct correlation between corticosterone levels or the corticosterone/DHEA ratio and the behaviors studied. After the FST, serum DHEA and corticosterone levels were increased, with females showing higher DHEA levels than males. Nevertheless, corticosterone levels were unaltered with chronic procedure; an effect that was independent of sex and treatment. These findings are relevant for research examining alternative treatment for depression and may elucidate the gender differences involved in stress-related diseases.
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Affiliation(s)
- S Andrade
- Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Erhardt E, Zibetti LCE, Godinho JM, Bacchieri B, Barros HMT. Behavioral changes induced by cocaine in mice are modified by a hyperlipidic diet or recombinant leptin. Braz J Med Biol Res 2006; 39:1625-35. [PMID: 17160272 DOI: 10.1590/s0100-879x2006001200014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2005] [Accepted: 08/21/2006] [Indexed: 11/22/2022] Open
Abstract
The objective of the present study was to determine if the acute behavioral effects of cocaine acutely administered intraperitoneally (ip) at doses of 5, 10 and 20 mg/kg on white male CF1 mice, 90 days of age, would be influenced by leptin acutely administered ip (at doses of 5, 10 and 20 microg/kg) or by endogenous leptin production enhanced by a high-fat diet. The acute behavioral effects of cocaine were evaluated in open-field, elevated plus-maze and forced swimming tests. Results were compared between a group of 80 mice consuming a balanced diet and a high-fat diet, and a group of 80 mice fed a commercially available rodent chow formula (Ralston Purina) but receiving recombinant leptin (rLeptin) or saline ip. Both the high-fat-fed and rLeptin-treated mice showed decreased locomotion in the open-field test, spent more time in the open arms of the elevated plus-maze and showed less immobility time in the forced swimming test (F(1,68) = 7.834, P = 0.007). There was an interaction between diets and cocaine/saline treatments in locomotion (F(3,34) = 3.751, P = 0.020) and exploration (F(3,34) = 3.581, P = 0.024). These results suggest that anxiolytic effects and increased general activity were induced by leptin in cocaine-treated mice and that low leptin levels are associated with behavioral depression. Chronic changes in diet composition producing high leptin levels or rLeptin treatment may result in an altered response to cocaine in ethologic tests that measure degrees of anxiety and depression, which could be attributed to an antagonistic effect of leptin.
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Affiliation(s)
- E Erhardt
- Departamento de Farmacologia, Faculdade Federal de Ciencias Medicas de Porto Alegre, Av. Neuza G. Brizola 495, 90460-230 Porto Alegre, RS, Brazil.
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Marquardt AR, Ortiz-Lemos L, Lucion AB, Barros HMT. Influence of handling or aversive stimulation during rats' neonatal or adolescence periods on oral cocaine self-administration and cocaine withdrawal. Behav Pharmacol 2004; 15:403-12. [PMID: 15343067 DOI: 10.1097/00008877-200409000-00015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Adverse early life events may influence vulnerability for drug intake. The influence of handling or aversive stimulation during neonatal or adolescent periods on adult cocaine oral self-administration and withdrawal were investigated. Neonatal or adolescent rats were exposed to a modified unpredictable stress paradigm or handling for 10 days. When adults, oral cocaine was offered through the two-bottle choice paradigm for 30 days. Rats were submitted to the forced swimming test after cocaine withdrawal. Overall, there was a significant increase of cocaine choice throughout the days of cocaine consumption and an interaction between interventions and cocaine daily choice. Control rats started cocaine intake at a lower level and increased cocaine choice over time, while animals submitted to neonatal interventions started cocaine intake at higher levels of choice, with less increase in cocaine intake during the period of cocaine exposure. Rats receiving aversive stimulation during adolescence also started taking cocaine solution at higher levels. Significantly higher immobility duration and shorter latency to immobility during the forced swimming were detected in these same adolescents that received unpredictable stress, when compared to the control or handled rats, while there was no difference for rats stimulated neonatally. Therefore, early life events increase initial preference for cocaine and promote changes in its abuse pattern, according to the intensity of the event and the age of the individual at the time of the event. Moreover, adverse experiences during adolescence, but not in neonatal phases, increase the vulnerability to depressive-like behaviors during cocaine withdrawal of adult rats.
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Affiliation(s)
- A R Marquardt
- Division of Pharmacology, Federal Faculty of Medical Sciences of Porto Alegre, Sarmento Leite, 245, Porto Alegre, RS, 90050-170, Brazil
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Abstract
The effects of drugs of abuse might depend on several environmental factors, among them the individual's feeding habits. It was our objective to study the influence of the diet on cocaine acute behavioral effects and during the first 5 days of withdrawal after prolonged treatment. Rats were fed a balanced diet, high-protein diet, high-carbohydrate diet or high-fat diet from weaning to adulthood. Adult rats were injected with 15 mg/kg cocaine 24, 5 and 1 h before the forced swimming retest or the drug was administered daily during 15 days and the animals were evaluated in the forced swimming test on five daily occasions after drug withdrawal. Diets alone did not induce significant behavioral differences in locomotion, immobility, swimming, climbing or head shakes. Acute cocaine reduced immobility during the forced swimming test and increased locomotion demonstrating a nonspecific antiimmobility effect related to hyperactivity. Acute cocaine reduced head shakes of rats fed high-protein and high-carbohydrate diets. After cocaine withdrawal, head shakes were decreased for rats fed any of the diets and rats were more immobile if fed a high-fat diet and were less immobile if fed a high-protein or high-carbohydrate diet. In conclusion, differences in the amounts of macronutrients in the diet may cause different behavioral outcomes after acute cocaine and during cocaine withdrawal.
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Affiliation(s)
- M Loebens
- Division of Pharmacology, Federal Faculty of Medical Sciences of Porto Alegre, Rua Sarmento Leite, 245, Porto Alegre, RS 90050-170, Brazil
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Abstract
Pilocarpine is a cholinergic agonist that increases salivary flow and has been used to treat xerostomia. Oral intake is the most frequent route of administration. Adverse effects are dose-dependent and include sudoresis, facial blushing and increased urinary frequency. The objective of the present study was to evaluate the effects of topical pilocarpine solutions as mouthwashes on salivary flow and their adverse effects on healthy subjects. Forty volunteers received 10 ml 0.5, 1 and 2% pilocarpine solutions or 0.9% saline in a randomized, double-blind, placebo-controlled manner. Salivation was measured before and 45, 60 and 75 min after mouth rinsing for 1 min with 10 ml of saline or pilocarpine solutions. Vital signs were measured and ocular, gastrointestinal and cardiovascular symptoms, anxiety and flushing were estimated using visual analog scales. There was a dose-dependent increase in salivation. Salivation measured after 1 and 2% pilocarpine (1.4 +/- 0.36 and 2.22 +/- 0.42 g, respectively) was significantly (P<0.001) higher than before (0.70 +/- 0.15 and 0.64 +/- 0.1 g), with a plateau between 45 and 75 min. Cardiovascular, visual, gastrointestinal and behavioral symptoms and signs were not changed by topical pilocarpine. Mouth rinsing with pilocarpine solutions at concentrations of 1 to 2% induced a significant objective and subjective dose-dependent increase in salivary flow, similar to the results reported by others studying the effect of oral 5 mg pilocarpine. The present study revealed the efficacy of pilocarpine mouthwash solutions in increasing salivary flow in healthy volunteers, with no adverse effects. Additional studies on patients with xerostomia are needed.
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Affiliation(s)
- R Bernardi
- Divisão de Farmacologia Básica e Clínica, Departamento de Ciências Fisiológicas, Fundação Faculdade Federal de Ciências Médicas de Porto Alegre, Porto Alegre, RS, Brasil
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