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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The development of immunoassays for follistatin and activin and their clinical applications

Evans, Lee W. January 1997 (has links)
No description available.
2

Effects of gonadal hormone deficiency on bone mineral density : can physical activity increase bone mineral density in women? /

Bergström, Ingrid, January 2006 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst., 2006. / Härtill 4 uppsatser.
3

Influência da flutuação hormonal feminina na força de mordida e performance mastigatória de pacientes portadoras de desordens temporomandibulares / Influence of the feminine hormonal fluctuation on bite force and masticatory performance in patients with temporomandibular disorders

Gonçalves, Thais Marques Simek Vega, 1980- 16 August 2018 (has links)
Orientador: Renata Cunha Matheus Rodrigues-Garcia / Dissertação (mestrado) - Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-16T04:43:06Z (GMT). No. of bitstreams: 1 Goncalves_ThaisMarquesSimekVega_M.pdf: 1027067 bytes, checksum: 92d491bec7f696929f36bacc93b9a487 (MD5) Previous issue date: 2010 / Resumo: A maior prevalência de desordens temporomandibulares (DTMs) ocorre especialmente em mulheres durante a fase reprodutiva, sugerindo uma possível influência dos hormônios reprodutivos na etiologia destas desordens. O objetivo do presente trabalho foi avaliar a possível influência das flutuações hormonais ocorridas durante o ciclo menstrual, sobre a força máxima de mordida (FMM) e performance mastigatória (PM) de mulheres com e sem DTM. Foram selecionadas 62 voluntárias: 14 com DTM e usuárias de contraceptivos orais (CO) (idade média: 23,21 ± 3,01 anos); 16 sem DTM e usuárias de CO (controle, idade média: 22,8 ± 3,17 anos); 15 voluntárias com DTM e com ciclos menstruais regulares (idade média: 23,69 ± 5,73 anos) e 17 voluntárias sem DTM e com ciclos menstruais regulares (idade média: 23,9 ± 5,7 anos). A DTM foi diagnosticada por meio do Research Diagnostic Criteria (RDC/TMD) (Eixo I), sendo selecionadas as voluntárias com DTM de origem articular com ausência de sintomatologia dolorosa (deslocamento de disco articular). O índice de massa corporal (IMC) (Kg/m2) foi calculado por meio da razão entre o peso corporal (Kg) e o quadrado da altura (m). A avaliação da FMM foi realizada por meio de sensores instalados bilateralmente na região dos dentes molares, solicitando à voluntária que ocluísse com máxima força durante sete segundos, e permitido um intervalo de cinco minutos entre as duas mensurações realizadas. A PM foi avaliada por meio da mastigação de material teste artificial Optosil® e a separação do material triturado pelo fracionamento em peneiras acopladas a um agitador, expressando o valor da PM segundo o tamanho médio das partículas (X50). As variáveis foram mensuradas em todas as fases do ciclo menstrual, identificadas com auxílio de teste preditor de ovulação, sendo avaliados três ciclos menstruais completos. A homogeneidade da amostra segundo a idade e o IMC foi avaliada por meio do teste de variância um fator. Os valores de FMM e PM foram submetidos ao teste de esfericidade de Mauchly, e aplicado o procedimento PROC MIXED para medidas repetidas do programa estatístico SAS. Comparações múltiplas foram realizadas pelo teste de Tukey-Kramer com nível de significância de 5%. Não foram verificadas diferenças entre os grupos em relação à idade (p=0,92) e IMC (p=0,86), revelando a homogeneidade da amostra. Comparações entre as fases do ciclo menstrual não revelaram diferenças nos valores de FMM (p=0,5716). Independente do uso de CO, as voluntárias com DTM apresentaram os menores valores de FMM (p?0,05). Não houve diferença significante na FMM dentre as voluntárias que faziam ou não uso de CO (p=0,1522). Com relação à PM não houve diferenças entre voluntárias com e sem DTM (p>0,05), assim como entre as fases do ciclo menstrual (p=0,1177) e entre aquelas que faziam ou não uso de CO (p=0,3422). Desta forma, conclui-se que a flutuação hormonal feminina não influenciou a FMM e PM. A presença de DTM, mesmo na ausência de sintomatologia dolorosa, reduziu a FMM, entretanto, a PM não foi influenciada / Abstract: The higher prevalence of temporomandibular disorders (TMD) among women occurs during reproductive age suggesting that female reproductive hormones may play a role in TMD. The aim of the present study was to evaluate the possible influence of hormonal fluctuation at the menstrual cycle, on maximum bite force (MBF) and masticatory performance (MP) in women with or without TMD. Sixty two volunteers were selected: 14 women with TMD and taking oral contraceptives (OC) (mean age = 23.21 ± 3.01 years); 16 without TMD taking OC controls (mean age = 22.8 ± 3.17 years); 15 normally cycling women with TMD (mean age = 23.69 ± 5.73 years) and 17 normally cycling without TMD (mean age = 23.9 ± 5.7 years). TMD diagnosis was performed by Research Diagnostic Criteria (RDC/TMD) (Axis I) application, being selected those volunteers that presented articular TMD diagnosis without pain (joint disk displacement). Body mass index (BMI) was calculated by the ratio between the weight in kilograms (Kg) and the height in meters (m) squared (Kg/m2). MBF evaluation was performed through sensor in bilateral way at molar teeth area, requesting the volunteer to occlude with maximum force during seven second, allowed an interval of five minutes among the two measurements. MP was evaluated by chewing artificial test material Optosil®, and separation of chewed material at sieve system coupled an agitator, expressing MP value according to medium particle size (X50). The variables were evaluated in all menstrual cycle phases, identified with the aim of an ovulation test, and three complete menstrual cycles were analyzed. The sample homogenate according to age and BMI was analyzed by one way ANOVA. MBF an MP data were submitted to Mauchly's sphericity test and PROC MIXED procedure of SAS statistical program was applied for repeated measures. Multiple comparisons were accomplished by Tukey-Kramer test with significance level of 5%. No differences were found between the volunteers for age (p=0.92) or BMI (p=0.86), showing the homogeneity of the sample. Comparisons among menstrual cycle phases showed no difference in MBF values (p=0.5716). Independently of OC use, TMD volunteers presented the smallest MBF values (p?0.05). No differences on MBF were found between volunteers using or not OC (p=0.1522). In relation to MP, no differences were noticed among the volunteers with or without TMD (p>0.05), as well as between menstrual cycle phases (p=0.1177) or between groups taking or not OC (p=0.3422). This way, it can be concluded that feminine hormonal fluctuation did not influence MBF and MP. The presence of TMD, even without pain symptoms, reduced MBF, however, MP were not influenced / Mestrado / Protese Dental / Mestre em Clínica Odontológica
4

Influência da flutuação hormonal sobre o movimento mandibular mastigatório de portadoras de deslocamento de disco articular / Influence of the femine hormonal fluctuations on jaw masticatory movement in patients with articular disc displacement

Oliveira, Jonas Alves de, 1979- 07 August 2011 (has links)
Orientador: Renata Cunha Matheus Rodrigues Garcia / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-18T19:59:49Z (GMT). No. of bitstreams: 1 Oliveira_JonasAlvesde_D.pdf: 1670128 bytes, checksum: 578dc0d51fde913279b576735cdfeac0 (MD5) Previous issue date: 2011 / Resumo: A natureza multifatorial e os dados epidemiológicos envolvendo gênero sugerem que as Desordens Temporomandibulares (DTM) tenham como um dos componentes etiológico e de manutenção, os hormônios reprodutivos femininos. Este estudo avaliou a influência da flutuação hormonal nas fases menstrual, folicular, ovulatória, e lútea, sobre o padrão de movimento mandibular mastigatório de mulheres com e sem deslocamento de disco articular (DD). O deslocamento de disco articular com ausência de sintomatologia dolorosa foi diagnosticado por meio do Research Diagnostic Criteria for Temporomandibular Disordes (RDC/TMD). Foram selecionadas 57 voluntárias (idade média de 23,3 anos ±3,9) e distribuídas da seguinte forma: grupo (1): 13 portadoras de deslocamento de disco articular e ciclo menstrual regular; grupo (2): 15 com deslocamento de disco articular e que faziam uso de contraceptivo oral; grupo (3): 16 sem deslocamento de disco articular e com ciclo menstrual regular; e grupo (4)-controle: 13 com ausência de deslocamento de disco articular e que faziam uso de contraceptivo oral. Todas tiveram o índice de massa corporal (IMC) (Kg/m2) calculado por meio da razão entre o peso corporal (Kg) e o quadrado da altura (m). Foram feitas 12 avaliações do movimento mastigatório por voluntária em três ciclos menstruais completos. Os traçados dos movimentos mandibulares foram registrados durante a mastigação de silicone Optosil®, utilizando o equipamento cinesiógrafo (K6-I Diagnostic System, Myotronics Research. Inc) nos planos frontal e sagital, avaliando-se as amplitudes (mm) vertical, lateral e ântero-posterior, área total (mm2) frontal e sagital do ciclo mastigatório, e velocidade (mm/s) de abertura e fechamento da boca. A homogeneidade entre os grupos, segundo a idade e o IMC, foi avaliada por meio do teste de variância de um fator. Sendo medidas repetidas no tempo, foi aplicado o teste de esfericidade de Mauchly com análise multivariada de modelo misto de três critérios, e o teste de Tukey (?= 0,05) nas comparações múltiplas (Statistic v 5.1). Os grupos foram homogêneos quanto à idade (p= 0,793) e ao índice de massa corporal (p= 0,927). Dentre as variáveis mensuradas, somente a área total do ciclo mastigatório no plano frontal (p= 0,011) e sagital (p= 0,035) apresentaram diferença significante para as fases do ciclo menstrual, em que a fase lútea (4a mensuração) foi maior para mulheres que faziam ou não uso de contraceptivo oral. A amplitude lateral apresentou diferença significante para o uso ou não de contraceptivo oral (p= 0,049), em que os grupos com uso tiveram maiores valores, mas sem diferença para as fases do ciclo (p=0,063). Não houve diferença estatística entre os grupos com e sem DD. Pode se concluir que a flutuação hormonal feminina não teve efeito no padrão de movimento mandibular mastigatório / Abstract: The multifactor nature and epidemiological data involving gender suggest that temporomandibular disorders (TMD) have as etiological and maintenance component the female reproductive hormones. The influence of hormonal fluctuation during menstrual, follicular, ovulation and luteal phases on the pattern of mandibular movement of women with and without articular disc displacement (DD) was investigated. The articular disc displacement with absence of pain was diagnosed using the Research Diagnostic Criteria for Temporomandibular Disorder (RDC / TMD). Fifty seven were selected (mean age 23.3 years ± 3.9) and distributed in groups as follows: Group 1: Thirteen women diagnosed with articular disc displacement and regular menstrual cycle; Group 2: Fifteen with articular disc displacement and who were using oral contraceptive; Group 3: Sixteen without articular disc displacement and with regular menstrual cycles; and Group 4 (Control Group): Thirteen without articular disc displacement and who were using oral contraceptive. The body mass index (BMI) (kg/m2) was calculated using the ratio of body weight (kg) and squared height (m). Twelve assessments for each volunteer were taken (three full menstrual cycles). The tracings of mandibular movements were recorded during chewing of silicone Optosil® using a kinesiographic device (K6-I Diagnostic System, Myotronics Research. Inc) on frontal and sagittal planes, evaluating vertical, lateral and anteroposterior amplitudes (mm), total area (mm2), frontal and sagittal masticatory cycle, and speed (mm/s) of opening and closing. The homogeneity between groups according to age and BMI was evaluated through one-way analysis of variance. Mauchly's Sphericity Test with a mixed multivariate analysis of three criteria was used to validate repeated measures. In addition, Tukey's test was carried (? = 0.05) in multiple comparisons (Statistica v 5.1). The groups were homogeneous in age (p = 0.793) and body mass index (p = 0.927). There was no statistical difference between groups with and without DD. Among the variables measured, only the total area of the chewing cycle in the frontal (p=0.011) and sagittal planes (p=0.035) showed significant difference for the female sexual cycle stages in which the luteal phase (4th measurement) was highest for women who did or did not use oral contraceptive. The lateral amplitude was significantly lower for non-use of oral contraceptive (p = 0.049), and the other groups showed highest values for contraceptive use, but no difference for cycle phases (p = 0.063) was found. There were no differences between groups with and without DD. It can be concluded that hormonal fluctuation on women had no effect on the pattern of jaw masticatory movement / Doutorado / Protese Dental / Doutor em Clínica Odontológica
5

Effects of endocrine disruptors on adrenocortical and leydig cell steroidogenesis /

Supornsilchai, Vichit, January 2007 (has links)
Diss. (sammanfattning) Stockholm : Karolinska institutet, 2007. / Härtill 4 uppsatser.
6

"Avaliação da função gonadal em pacientes do sexo masculino com dermatomiosite juvenil" / Gonadal function evaluation in male patients with juvenile dermatomyiositis

Moraes, Ana Julia Pantoja de 09 September 2005 (has links)
Em sete adolescentes com dermatomiosite (DM) juvenil (DMJ) foi avaliada a função gonadal através do estadiamento puberal, aspectos da sexualidade, exame físico da genitália e exames complementares: análise seminal (duas amostras com intervalo de um mês), anticorpos anti-espermatozóides, ultra-sonografia escrotal e dosagens hormonais (testosterona, hormônio estimulante do folículo, hormônio luteinizante, prolactina, T3, T4, T4 livre e TSH). Todos os pacientes apresentaram terazospermia, dois tiveram varicocele e um anticorpo anti-espermatozóide localizado em peça intermediária. A futura fertilidade destes pacientes é incerta e estudos de prevalência de função gonadal em populações de jovens e adultos do sexo masculino com DM são necessários / In seven adolescents with dermatomyositis (MD) juvenile (JDM), gonadal function was evaluated through the puberal estadiamento, aspects of the sexuality, examination of the genitalia, semen analysis (two semen samples over a period of one month), anti-sperm, testicular ultrasound and hormones (testosterone, follicle stimulating hormone, luteinizing hormone, prolactin, T3, T4, free T4 and TSH).
7

"Avaliação da função gonadal em pacientes do sexo masculino com dermatomiosite juvenil" / Gonadal function evaluation in male patients with juvenile dermatomyiositis

Ana Julia Pantoja de Moraes 09 September 2005 (has links)
Em sete adolescentes com dermatomiosite (DM) juvenil (DMJ) foi avaliada a função gonadal através do estadiamento puberal, aspectos da sexualidade, exame físico da genitália e exames complementares: análise seminal (duas amostras com intervalo de um mês), anticorpos anti-espermatozóides, ultra-sonografia escrotal e dosagens hormonais (testosterona, hormônio estimulante do folículo, hormônio luteinizante, prolactina, T3, T4, T4 livre e TSH). Todos os pacientes apresentaram terazospermia, dois tiveram varicocele e um anticorpo anti-espermatozóide localizado em peça intermediária. A futura fertilidade destes pacientes é incerta e estudos de prevalência de função gonadal em populações de jovens e adultos do sexo masculino com DM são necessários / In seven adolescents with dermatomyositis (MD) juvenile (JDM), gonadal function was evaluated through the puberal estadiamento, aspects of the sexuality, examination of the genitalia, semen analysis (two semen samples over a period of one month), anti-sperm, testicular ultrasound and hormones (testosterone, follicle stimulating hormone, luteinizing hormone, prolactin, T3, T4, free T4 and TSH).
8

The Role of Gonadal Hormones in Mesencephalic Dopaminergic Systems

Johnson, Misha Lynette 11 August 2008 (has links)
<p>Dopamine regulates movement, cognition and the rewarding effects of addictive drugs. Sex differences mediated by gonadal hormones affect each of these processes. An extensive literature suggests that estrogen augments dopaminergic function. Our laboratory found that female rats exhibit increased locomotor stimulation in response to cocaine and greater cocaine-induced dopamine overflow compared to males, sex differences that emerge in early adulthood. Currently, the underlying mechanisms for these differences are poorly understood. I hypothesized that female rats would have more dopamine neurons in midbrain regions and that ovarian hormones would exert trophic effects on dopamine neurons. Immunohistochemical and stereological techniques were used to quantitate the number of cells in the SNpc and VTA of male and female rats and mice to assess: (1) if sex differences in dopamine neuron number exist and when they emerge, (2) how gonadal hormones influence dopaminergic cell number and dopamine-mediated behaviors (3) the role of specific hormone receptors in the effects on cell number (4) the possibility that dopamine neuron number is directly linked to cocaine-stimulated behavior and electrically-stimulated dopamine release and that these responses to cocaine are mediated through gonadal hormone modulation of midbrain dopamine neuron number. I discovered sex differences in midbrain dopamine neuron number; adult female rodents have more neurons in the SNpc and VTA. We also found that gonadectomy in adulthood reduced midbrain dopamine neuron number in females and increased neuron number in males, establishing the trophic effects of estrogen in the intact midbrain and possible suppressive effects of androgens. Treatment with agonists for estrogen receptor subtypes alpha and beta and androgen receptor reversed the effects of gonadectomy on cell number in females and males, respectively. In an effort to bridge cocaine-stimulated behavior and cell number in sham ovariectomized and ovariectomized females, we discovered cocaine-stimulated behavior, dopamine release and SNpc cell density were positively correlated in intact female rats, an effect that is lost with ovariectomy. This dissertation demonstrates that estrogen is critical for the maintenance of dopaminergic cell populations that enhance behavioral responses to psychostimulants in females, thereby contributing to the observed sex differences.</p> / Dissertation
9

Social modulation of adult brain cell proliferation: influence of sex and gonadal hormones

Almli, Lynn Marie 14 October 2009 (has links)
Environmental factors are known to have far reaching effects on nervous system function, and in the adult brain, it is clear that a wide range of environmental stimuli modulate cell proliferation and survival (e.g., neurogenesis). This project investigated whether social stimulation and concomitant changes in gonadal hormones can influence the proliferation of new cells in the adult brain. The adult green treefrog (Hyla cinerea)was used as the model system; studying the courtship behavior of the highly social treefrog affords a direct, quantifiable way to measure the effects of acoustic social cues and hormonal intervention on adult brain cell proliferation. Using immunohistochemistry techiques, endocrinological manipulations, and socially-relevant acoustic stimulus presentations, I report that social cues modulate cell proliferation in the brains of adult male and female H. cinerea. I first mapped the distribution of proliferative areas in the adult treefrog brain using 5-bromo-2′- deoxyuridine (BrdU) labeling. I then exposed naturally-cycling male and female treefrogs to random tones or a recording of a natural H. cinerea chorus for ten days during the breeding season. I found that male and female treefrogs that heard their conspecific chorus exhibited increased brain cell proliferation compared to animals that heard random tones. Moreover, this modulation was region-specific and occurred in those regions which reflected their presumed involvement in reproductive physiology and behavior: the preoptic area (POA) and the infundibular hypothalamus (IF). To determine the involvement of gonadal hormones in cell proliferation with and without social stimulation, I gonadectomized and implanted male and female H. cinerea with blank or steroid-filled implants. After exposing the treefrogs to the same acoustic conditions as above, I discovered that social modulation of adult cell proliferation can occur without the influence of gonadal hormones (i.e., androgens in the male and estrogen in the female). Furthermore, the results revealed that neither hormone was neurotrophic and in fact, chronically-elevated estrogen levels decreased cell proliferation in the female POA and IF. Together, these results indicate that the reception of acoustic social cues increases cell proliferation in brain regions mediating sexual behavior and endocrine regulation; furthermore, this modulation occurs in a sexually-differentiated fashion without gonadal hormone influence. / text
10

Influência de hormônios gonadais no eixo [ECA2/ANG(1-7)/Mas] encefálico para o controle da sede e apetite por sódio em ratos / Influence of gonadal hormones in the cerebral ACE2/ANG(1-7)/Mas axis for the control of thirst and sodium appetite in rats

Alves, Julio Cesar Santana 26 July 2013 (has links)
Sodium and water intake are important regulatory components of the hidromineral balance. In this context, human body regulates hidromineral imbalance through the neuro-immune-endocrine and behavioral response. Gonadal hormones are important players for the modulation of ingestive behaviors. The present study aimed to investigate the influence of male and female gonadal hormones in cerebral ECA2/ANG-(1-7)/Mas axis over the control of water sodium intake in rats. In this experiment, ovariectomized female rats were treated with estradiol benzoate (20μg/animal/day, sc; OVXE) or vehicle (sunflower oil; OVXV). Male rats underwent bilateral orchiectomy (ORQX) or sham surgery (SHAM). Guide cannulae were implanted into the right lateral ventricle for intracerebroventricular administration (icv) of drugs. We used angiotensin-converting enzyme type 2 (ACE2) activator, DIZE (diminazene of aceturate, 40 nmol / 2μl , icv ) or the antagonist of Ang-(1-7) Mas recetor, D-Ala7-ANG-(1-7) (A779, 10 nmol / 2μl, icv). The vehicle for both drugs was artificial cerebrospinal fluid (aCFS) administered in the same volume. For induction of thirst and sodium appetite, animals were subjected to hydrossaline depletion by administration of furosemide (20 mg / kg, sc) and access to distilled water and low sodium diet (corn ) for 24 hours. After microinjection of drugs, water and 0.3 M NaCl were reoffered and the ingested volume were recorded at the following 15, 30 , 60, 90 , 120, 180, 240 min and 24 h. Two-way analysis of variance was performed, followed by Bonferroni posthoc test when appropriate. The level of significance was p < 0.05. In females treated with vehicle or DIZE, sodium and water intake, as well as sodium preference index (SPI) did not differ between groups. However, OVXV ingested less water than OVXE when both were treated with A779 (p < 0.05). Twenty-four hours after reintroduction of fluids intake sodium ingestions was higher in OVXV than in OVXE when both received A779 (p<0.05). Similarly, OVXV rats showed greater preference for sodium when compared to OVXE, if both received icv injection of A779. Males ORQX microinjected with aCFS ingested more water than SHAM+aCSF. However, at 30 min, SHAM+DIZE male rats presented higher water intake when compared to their respective control. Up to 15 min after reintroduction of fluids, ORQX rats ingested less sodium than SHAM rats, regardless DIZE administration (p < 0.05). Water intake as well as SPI did not differ between groups in males undergoing A779 administrarion. However sodium intake was lower in ORQX+A779 than in ORQX+aCFS (p < 0.05) at 30, 60 , 90, 120 , 180 and 240 min after fluid presentation. Thus, we conclude that estrogen seems to exert inhibitory influences on sodium intake independent ECA2/ANG (1-7)/Mas activity. On the other hand, the male gonadal hormones act by raising intake for the regulation of salt intake shaft in the proposed protocol. / Os comportamentos de ingestão de sódio e água constituem importantes componentes regulatórios do equilíbrio hidroeletrolítico. Neste contexto, o organismo humano regula seu déficit hidromineral através de uma resposta neuroimunoendócrina e comportamental comandada majoritariamente pelo sistema nervoso central (SNC). Reconhecidamente, os hormônios gonadais representam importantes fatores moduladores dos comportamentos ingestivos. O presente estudo objetivou estudar a influência dos hormônios gonadais masculinos e femininos no eixo ECA2/ANG(1-7)/Mas sobre o controle da ingestão de água e NaCl 0,3 M em ratos e ratas. Neste experimento, fêmeas ovariectomizadas foram tratadas com benzoato de estradiol (20μg/animal/dia, s.c.; OVXE), ou com veículo (óleo de girassol; OVXV). Machos foram submetidos à orquiectomia bilateral (ORQX) ou cirurgia fictícia (SHAM). Por meio de cirurgia estereotáxica, cânulas-guia foram implantadas no ventrículo lateral direito para administração intracerebroventricular (icv) das drogas utilizadas. Foram utilizados o ativador da enzima conversora de angiotensina tipo 2 (ECA2), DIZE (Aceturato de Diminazeno, 40 nmol / 2 μL, i.c.v.) ou o antagonista do receptor Mas de ANG (1-7), o D-Ala7-ANG(1-7) (A779, 10 nmol / 2 μL, i.c.v.). O veículo para ambas as drogas foi líquido cerebro-espinhal artificial (LCEa), administrado nos animais controle em igual volume. Para indução da sede e apetite por sódio, os animais foram submetidos a depleção hidrossalina por administração de um diurético de alça (furosemida, 20 mg / kg, s.c.) e acesso à água destilada e dieta pobre em sódio (fubá de milho) por 24 horas. Após a microinjeção das drogas, água e de NaCl 0,3 M foram reapresentados e registrados os volumes ingeridos nos tempos 15, 30, 60, 90, 120, 180, 240 min e 24 h. Foram realizadas análises de variância de duas vias seguidas do pós-teste de Bonferroni, quando necessário. O nível de significância foi de p < 0,05. Os dados demonstraram que, em fêmeas tratadas com DIZE ou veículo, a ingestão de água, NaCl 0,3 M e o índice de preferência ao sódio (IPS) não diferiram entre os grupos. Porém, fêmeas OVXV ingeriram menos água quando comparadas às femeas OVXE, quando ambas foram tratadas com A779 (p < 0,05). Vinte e quatro horas após a reapresentação de fluidos, a ingestão de NaCl 0,3 M foi maior em ratas OVXV que nas OVXE, quando ambas receberam A779 (p < 0,05). No mesmo sentido, ratas OVXV apresentaram maior preferência por sódio que as OVXE, ambas tratadas com A779. Machos ORQX microinjetados com LCEa ingeriram mais água quando comparados aos animais do grupo SHAM+LCEa. Todavia, aos 30 min, os machos SHAM+DIZE apresentaram maior ingestão de água quando comparado ao seu respectivo controle. Até 15 min após a reapresentação de fluidos, a ingestão de NaCl 0,3 M em ratos ORQX foi menor em comparação aos ratos SHAM independente do tratamento com DIZE (p<0,05), o IPS não diferiu entre os grupos. Os dados referentes a ingestão de água e ao IPS em machos submetidos ao tratamento icv com A779, revelam não haver diferença entre os grupos estudados, porém para ingestão de NaCl 0,3 M, os ratos ORQX+A779 demonstraram menor ingestão quando comparados aos animais ORQX+LCEa (p<0,05) nos tempos 30, 60, 90, 120, 180 e 240 min. Assim, podemos concluir que o estrógeno parece exercer influencia inibitória na ingestão de sódio independente da atividade do eixo ECA2/ANG(1-7)/Mas. Por outro lado, os hormônios gonadais masculinos atuam elevando a ingestão hidrossalina para a regulação do eixo no protocolo proposto.

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