Suzana de Fátima Paccola Mesquita
Universidade Estadual de Londrina
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Anatomical Record-advances in Integrative Anatomy and Evolutionary Biology | 2011
Luiz Gustavo A. Chuffa; Roberta Barreiros de Souza; Fernando Frei; Suzana de Fátima Paccola Mesquita; Isabel Cristina Cherici Camargo
In the past decades, the therapeutic use of anabolic androgenic steroids (AAS) has been overshadowed by illicit abuse of these drugs by athletes and non‐athletes. Since that AAS can affect the reproductive tract, resulting in reproduction and fertilization damages, the purpose of this study was to investigate the nandrolone decanoate (ND) effects, associated or not with physical effort, on the uterine histomorphometric parameters. Female Wistar rats, sedentary or not, were exposed to treatment with ND by intraperitoneal injection (5 mg/kg/day, once a week) during four consecutive weeks. Control animals, sedentary or not, received vehicle alone (propylene glycol) in the same manner. The physical activity was forced swimming (20 min/day). During the experiment, all animals were monitored by daily vaginal smears. After 30 days of treatment, the females were sacrificed and their uteri collected and examined under light microscopy techniques. The ND‐treated females showed estrus acyclicity and decreased thickness of both the epithelium and endometrial stroma. A reduction in the number and size of blood vessels was also found in ND‐treated rats submitted to physical effort when compared to ND sedentary rats. ND‐treated rats, regardless of exercise, exhibited stromal fibrosis and reduced gland ducts that displayed high mitotic activity. A remarkable widespread presence of leukocytes occurred in rats receiving ND and submitted to exercise. These results suggest that ND associated or not with physical effort causes histomorphometric changes to the rat uterus. Anat Rec, 2011.
Reproductive Toxicology | 2013
Milene Leivas Vieira; Renata Yumi Hamada; Natalia Ignácio Gonzaga; André Demambre Bacchi; Mainara Ferreira Barbieri; Estefânia Gastaldello Moreira; Suzana de Fátima Paccola Mesquita; Daniela Cristina Ceccatto Gerardin
Based on the limited number of studies that have investigated the adverse effects of maternal treatment with antidepressants on the development of male descendents, this study was carried out in rat in order to evaluate if maternal exposure to fluoxetine (FLX) or St. Johns Wort (SJW) could disrupt the development of male offspring. The dams were treated daily, by gavage, with 7.5 mg/kg of FLX or 100 mg/kg SJW during pregnancy and lactation. The reproductive and behavior parameters were analyzed in male pups. Results showed decreases in the weight of the full seminal vesicle and in the number of spermatozoa. Moreover, FLX-exposed pups presented reduced seminiferous epithelium height and diameter of seminiferous tubules. The present study shows that maternal exposure to FLX, but not SJW could interfere on reproductive parameters in adult male rats.
Toxicology | 2015
Gláucia Elóisa Munhoz de Lion Siervo; Henrique Rodrigues Vieira; Fernanda M. Ogo; Carla D. B. Fernandez; Géssica D. Gonçalves; Suzana de Fátima Paccola Mesquita; Janete A. Anselmo-Franci; Rubens Cecchini; Flávia Alessandra Guarnier; Glaura Scantamburlo Alves Fernandes
Chronic consumption of ethanol causes morphological and physiological changes in the reproductive system of mammals. Vitamin C has an antioxidant role in organisms by neutralizing the ROS (reactive oxygen species) produced by oxidizing agents and this vitamin has an important function in the male reproductive system. The aim of this study was to evaluate whether vitamin C could prevent or attenuate the alterations in the male reproductive system caused by ethanol consumption. To test this hypothesis, male rats were divided into three experimental groups and treated by gavage for 63 days. The ethanol (E) and ethanol+vitamin C (EC) groups received 2 g/kg of ethanol (25%v/v) daily. In addition to ethanol, the EC group received vitamin C at a dose of 100 mg/day, diluted in water. The control group (C) received only the vehicle. On the 64th experimental day, the animals were anesthetized and euthanized, and blood was collected for plasmatic hormonal analysis. The testis, epididymis, vas deferens, and seminal vesicles were removed and weighed. Sperm from the vas deferens was submitted to morphological and motility analysis. The testis and epididymis were used for oxidative stress and histopathological analysis, sperm count, morphometric analysis of the testis, and stereological analysis of the epididymis. The results showed that vitamin C has a protective effect in the testes of adult male rats, entirely normalizing the parameters of sperm count, spermatogenesis kinetics, lipid peroxidation levels, and sperm motility, as well as partially normalizing the histopathological damage in the testis, epididymis, and sperm morphology. Thus, we concluded that lipid peroxidation is a major mechanism by which ethanol affects the testes and sperm, whereas no plasmatic testosterone alterations were found.
Revista Brasileira de Ginecologia e Obstetrícia | 2009
Isabel Cristina Cherici Camargo; Ana Luisa Camolezi Gaspar; Fernando Frei; Suzana de Fátima Paccola Mesquita
PURPOSE: to evaluate the effects of the administration of two synthetic steroids in the uterus morphology and in the reproductive parameters of adult female rats. METHODS: divided into four experimental groups: control (C; physiological solution); treated with nandrolone decanoate (DN; 7.5 mg/kg of body weight); with a testosterone esters compound (T; 7.5 mg/kg); and simultaneously with DN and T (7.5 mg/kg of each steroid), in a single intraperitoneal weekly dose, for eight weeks. Five females of each group were sacrificed and the uterine horns were collected, weighted and prepared for histological and morphometrical evaluation. The remaining rats were mated with normal male rats for reproductive parameters evaluation, composing the groups treated during the pre-gestational period. Another group of 20 female rats were treated during the gestational period (7th-14th days). For data analysis, the Kruskal-Wallis non-parametric variance analysis was used, followed by the test of Dunn or of Student-Newman-Keus (5% significance level). RESULTS: there was a significant body weight increase in the androgenized females (ND: 305±50; T: 280±35; ND+T: 275±30 versus C: 255±22 g; p<0.05). Uterine weight was not affected by the steroidal treatment (ND: 0.6±0.2; T: 0.4±0.04; ND+T: 0.7±0.1 versus C: 0.4±0.09 g). All the androgenized females presented estral acyclicity and endometrium characterized by papilliferous luminal lining, oedematous stroma with hemorrhagic areas and secretory activity. There were changes in the morphometrical thickness parameters of the luminal epithelium, myometrium and perimetrium in the androgenized groups. None of the female rats got pregnant when treated with steroids in the pre-gestational period and the treatment during organogenesis affected negatively the reproductive parameters. CONCLUSIONS: steroidal agents alter the uterine structure and impair fertility and gestational outcome in female rats.
Acta Biologica Hungarica | 2009
Isabel Cristina Cherici Camargo; Roberta Barreiros de Souza; Suzana de Fátima Paccola Mesquita; Luiz Gustavo A. Chuffa; Fernando Frei
The study was conducted to analyze the histology of the ovaries of adults rats treated with steroids, and submitted or not to physical effort. The control group consisted of females submitted to physical effort and sedentary females, both of which received a physiological solution of 0.9% saline. Treated females, sedentary or not, received 6 mg/kg of body weight of nandrolone decanoate. The steroid and physiological solution were administered intraperitoneally, with a single injection per week for 4 consecutive weeks. The applied physical effort was swimming (20 minutes daily, 5 days/week, for the 4 weeks of treatment). Serial sections (5 mum) of ovaries were prepared for histological evaluation and follicular score. The weight of ovaries and hypophysis, the number of antral and atretic follicles, and the area of corpus luteum were all affected by the steroids. In the ovaries of the control groups, well-developed corpus luteum was observed. In the treated groups, the cortical stroma was occupied by ovarian interstitial tissue. The females treated with steroids presented estral acyclicity. The use of nandrolone decanoate, whether associated with physical effort or not, affected the morphological pattern of the ovaries.
Fertility and Sterility | 2012
Patrick Vianna Garcia; Mainara Ferreira Barbieri; Juliana E. Perobelli; Sílvio Roberto Consonni; Suzana de Fátima Paccola Mesquita; Wilma De Grava Kempinas; Luis Antonio Violin Dias Pereira
OBJECTIVE To evaluate morphometric-stereological changes in the epididymal caput, sperm quality, and fertility parameters in rats treated with finasteride and after a 30-day post-treatment recovery period. DESIGN Experimental study in a research laboratory. SETTING Reproductive biology research laboratory. ANIMAL(S) Male and female Sprague Dawley rats. INTERVENTION(S) Treatment with finasteride (5 mg/kg/day) for 56 days followed by 30 days without treatment. MAIN OUTCOME MEASURE(S) Serum hormone analyses, morphometric-stereological and ultrastructural evaluation of the epididymal caput, sperm transit time, natural mating, in utero insemination, sperm membrane integrity, and fertility parameters. RESULT(S) Serum dihydrotestosterone levels in the finasteride group decreased by ~40% compared with that of control rats. Ultrastructural analysis revealed significant reductions in several morphometric-stereological parameters of the epididymal caput. All parameters recovered significantly in the post-treatment period. There was no alteration in daily sperm production in the finasteride group. However, significant reductions in sperm transit time, motility, sperm membrane integrity, and fertility parameters were observed in rats treated with finasteride. CONCLUSION(S) Treatment with finasteride caused morphometric-stereological and functional changes in the epididymis and in sperm function that led to a reduction in fertility parameters. A 30-day post-treatment recovery period was insufficient to restore normal sperm motility, sperm transit time, and some fertility parameters.
Genetics and Molecular Biology | 2006
Fábio Vieira dos Santos; Suzana de Fátima Paccola Mesquita; Maria José Sparça Salles de Faria; Aline Poersh; Maria Aparecida M. Maciel; Angelo C. Pinto; Helena Kaminami Morimoto; Ilce Mara de Syllos Cólus
The plant Croton cajucara Benth. (Euphorbiaceae) is a medicinal plant from the Brazilian Amazon where it is commonly known as sacaca. The principal compound isolated from C. cajucara stem-bark extracts is the clerodane-type diterpene trans-dehydrocrotonin (DCTN) which presents several biological activities, including antiulcerogenic, anti-inflammatory, hypoglycemic, antimutagenic and antitumoral activity. However, few studies have been carried out to evaluate the therapeutic potential of raw C. cajucara extracts. We studied mutagenicity and antimutagenicity effects of C. cajucara methanol extract using the micronucleus assay in bone marrow cells and the dominant lethal assay in mice submitted to subchronic treatments. The blood testosterone levels of the mice were also measured to assess the effects of the methanol extract on testes function. Statistical analysis of the data obtained in this study showed no statistically significant mutagenicity attributable to C. cajucara stem-bark extracts, nor did such extracts show antimutagenic activity at the concentrations assessed. The testosterone concentration was normal in all the mice studied.
Physiology & Behavior | 2014
Bruno Garcia Montagnini; Luiza Sienna Silva; Alice Hartmann dos Santos; Janete Aparecida Anselmo-Franci; Glaura Scantamburlo Alves Fernandes; Suzana de Fátima Paccola Mesquita; Daniela Cristina Ceccatto Gerardin
Methylphenidate (MPH) is a psychostimulant drug which acts by blocking the dopamine and norepinephrine transporters and is the main drug used to treat attention deficit hyperactivity disorder in children and adolescents. During puberty, changes in neurotransmitter systems (including dopaminergic system) are engaged on the release of gonadal hormones and the development of cephalic structures responsible for reproductive function. This study investigated the effects of repeated treatment with methylphenidate during development on reproductive parameters of adult male rats. Wistar rats received MPH 2.5 mg/kg, MPH 5.0 mg/kg, or distilled water (gavage) from postnatal day (PND) 21 to PND 60. At PND 100, an increase in percentage of abnormal tail morphology sperm in MPH 2.5 and increase in testicular interstitial tissue volume in MPH groups as well as in the number of type A spermatogonia in MPH 5.0 group were observed. This study demonstrated that repeated administration of methylphenidate during periods corresponding childhood to early adulthood interfered on testicular function in rats at adult life.
Biologia | 2008
Fábio Vieira dos Santos; Vanessa Jaqueline da Silva Vieira dos Santos; Maria José Farias; Suzana de Fátima Paccola Mesquita; Maria Aparecida M. Maciel; Angelo C. Pinto; Ilce Mara de Syllos Cólus
Croton cajucara Benth. (‘sacaca’) is a tree of the Euphorbiaceae family, native to the Amazon region in northern Brazil, where it is widely used in the popular treatment of various diseases. Its active principle, the terpenoid trans-dehydrocrotonin, has been credited with a variety of medical properties, including antiulcer, antiinflammatory, antitumor, antimutagenic and hypoglycemic activity. In this investigation, possible mutagenic and antimutagenic effects were evaluated in treatments using methanol extract of this plant on Swiss Albino mice by examining their peripheral blood cells for micronuclei. In these tests, the material obtained by methanol extraction of C. cajucara tree bark was administered to the mice by gavage. None of the doses evaluated in this study presented mutagenicity. Analysis of the results obtained from studies evaluating antimutagenicity revealed protection against the chemotherapeutic agent cyclophosphamide for the two highest doses used.
Microscopy Research and Technique | 2015
Ana Paula Alves Favareto; Lázaro Cícero Nogueira; Davi Abeid Pontes; Suzana de Fátima Paccola Mesquita; Isabel Cristina Cherici Camargo
Cisplatin (CPL) is one of the most widely used and effective chemotherapeutic agents for the treatment of several human malignancies. However, it causes serious side effects, especially on reproduction. In order to reduce the undesirable effects caused by many drugs, liposomes have been used as a good system for drug delivery. The aim of this study was to investigate, for the first time, the effects of CPL incorporated into the dipalmitoyl phosphatidylcholine liposome (DPPC) on the testicular tissue of adult Wistar rats. The animals (n = 20) were distributed into four experimental groups: (a) control (distillated water); (b) liposome (DPPC, 1 mL), (c) cisplatin incorporated into liposome (CPL/DPPC), and (d) CPL (8 mg/kg body weight). The animals received a single intraperitoneal injection and were killed 10 days after each treatment for histopathological analysis of testes. The results showed that the testicular histomorphometric parameters in rats of DPPC and CPL/DPPC groups were similar to those of the control group. Meanwhile, rats of the CPL‐treated group showed a variety of morphological alterations, including atrophy of seminiferous tubules and presence of multinucleated cells in the germinal epithelium. The incorporation of CPL into the liposome had no influence on the testicular weight or any other stereological parameters, but it was beneficial in maintaining the body weight of the animals. In conclusion, the liposome suppressed the cytotoxic effects caused by cisplatin in the testes of rats, suggesting a possible use in chemotherapy against cancer to reduce the side effects seen on reproduction. Microsc. Res. Tech. 78:323–329, 2015.