Haemato-Clinical Changes in Pregnant and Non-Pregnant Rats, Rattus rattus Linnaeus, 1758 under Parasitic Stress

2013 ◽  
Vol 44 (1) ◽  
pp. 1-19
2002 ◽  
Vol 7 (2) ◽  
Author(s):  
M. A. SILVA ◽  
L. E. KOZICKI ◽  
P. R. DALSENTER

Na presente pesquisa objetivou-se estudar os efeitos do gossipol (C30H30O8) na gestação e consequente lactação, de 40 ratas com idade média de 120 dias e peso variando entre 200 e 250 gramas, oriundas do Biotério Central da Universidade Federal do Paraná. Os animais foram acompanhados diariamente até a confirmação da cobertura através de esfregaço de lavado vaginal (esfregaço positivo - presença de espermatozóides) e separados em quatro grupos de dez animais: G I - controle, G II – gossipol 20 mg.kg-1, G III – gossipol 40 mg.kg-1, G IV - gossipol 80 mg.kg-1 respectivamente de acordo com a concentração de gossipol presente na suspensão utilizada (gossipol 20 mg.mL-1, gossipol 40 mg.mL-1 e gossipol 80 mg.mL-1). O gossipol ácido acético (GAA 97,8 % de pureza) diluído em óleo vegetal de canola (veículo) foi administrado oralmente para todos os animais no volume de 1 mL de suspensão para cada quilo de peso vivo. A administração da droga iniciou-se no 5o dia de gestação estendendo-se até o 20º. O peso das ratas foi aferido diariamente, do dia da cobertura até o dia do parto, a fim de se observar possíveis efeitos tóxicos durante a gestação. Durante a lactação as ratas e os filhotes eram pesados a cada 3 dias para acompanhar o desenvolvimento dos filhotes e recuperação materna. No desmame (21o dia pós-parto) todas as fêmeas foram sacrificadas para a observação dos pontos uterinos de implantação, comparando-se o número de fetos nascidos com o número de fetos gerados. Durante o experimento sete ratas do grupo G IV e uma do G III morreram, além de abortos e sinais de canibalismo na parturição. Observou-se como sinais de toxicidade: diarréia, inapetência, pelos eriçados, taquipnéa e perda de peso. Nenhum filhote apresentou alterações morfológicas macroscópicas. Concluiu-se que o gossipol (GAA) causou intoxicação grave nos animais que receberam maior dosagem, bem como interferiu no ganho de peso das ratas durante a gestação, peso ao nascimento e peso à desmama dos filhotes. Contudo não interferiu no processo de manutenção da gestação e no número de filhotes nascidos quando administrado entre o 5o e 20º dia de gestação. Gossypol toxicity in pregnant and nursing rats – Rattus rattus norvegicus Abstract In order to study the effects of gossypol (C30H30O8) in pregnancy and lactation, 40 female rats (120 days old) weighing between 200 and 250 grams, were used in this experiment. The animals were divided in four different group GI (n = 10), GII (n = 10), GIII (n = 10) and GIV (n = 10). The daily oral dose administered by gavage to the animals of each group was of 0, 20, 40 and 80 mg.kg-1 respectively of gossypol dissolved in canole oil. All rats were weighed daily from the day of copulation (0 day) to the day of parturition, for evaluation of the toxic effects during pregnancy. All rats and their offspring were weighed on days 3, 6, 9, 12, 15, 18 and 21 (day of weaning) of lactation. At the day of weaning, all rats were killed in order to observe the number of uterine implantation sites. Eight rats (1 from GIII group and 7 from GIV) died during the period of drug administration besides the occurrence of abortions and cannibalism at the parturition. Clinical symptoms of toxicity were diarrhea, inappetency, bristly hair, tachypnea, loss of weight. Neither pup displayed either macroscopic or morphological alterations. Heavy poisoning has been induced in rats that received higher doses of gossypol acetate as well as a dose-dependent decrease in body weight gain in pregnant rats, lesser weight at birth and at weaning. Nevertheless, gossypol did not interfere in the maintenance of pregnancy and in the number of pups born when administered from day 5 through day 20 of pregnancy.


1998 ◽  
Vol 3 (1) ◽  
Author(s):  
ROSILENE FERNANDES DA ROCHA ◽  
WILMA P. BASTOS-RAMOS ◽  
THALES ROCHA MATTOS FILHO ◽  
TEREZINHA O. NOGUEIRA

Foi estudada a influência da droga antimitótica 5-fluoruracil (5-FU), administrada a ratas prenhes sobre a formação do germe dental de ratos recém nascidos. Foram utilizadas 125 fêmeas com 90-100 dias de idade e 15 machos adultos (Rattus rattus norvaegicus, albinus, Wistar). A droga foi injetada por via intraperitoneal a ratas grávidas, em doses únicas, aos 9º, 10º, 11º , 12º ou 13 º dias de gestação. Os animais foram divididos em quatro subgrupos de acordo com a dose administrada: 10, 20, 30 e 40 mg/kg. Os resultados mostraram que nessas doses, o 5-FU não teve efeito tóxico nas ratas prenhes, alem de perda de peso com doses mais elevadas (30-40 mg/kg), enquanto causou anomalias dentais nos embriões, bem como malformações externas. A proporção de tais anomalias foi, alem de dose dependente, influenciada pelo dia de gestação no qual antimitótico foi administrado às mães: foi observada maior sensibilidade ao 9º dia e menor ao 10º dia. Doses mais elevadas (30-40 mg/kg) causaram freqüentemente morte do embrião e reabsorção fetal. Agenesia do germe dentário foi freqüentemente observada. Abstract It was studied the influence of the antimitotic drug 5 - fluorouracil (5-FU), administered to pregnant rats, on dental germ formation of newborn rats. A total of 125 female aged 90-100 days and 15 male adult rats (Rattus rattus norvaegicus, albinus, Wistar) were used. The drug was injected intraperitoneally in single doses to females at the 9th, 10th, 11th, 12th and 13th days of pregnancy. The animals were divided in four groups according to the doses administered: 10, 20, 30 and 40 mg/kg. Results show that the drug induced no toxicity to mothers, other than loss of body weight with higher doses (30-40 mg/kg), but caused in the fetuses dental germ anomalies and body external malformations. The proportion of such anomalies were, besides dose dependent, influenced by the day of pregnancy when the drug was administered to the mothers: there was a greater sensitivity at the 9th day and a lesser one at the 10th day. Higher doses (30-40 mg/kg) caused frequently embryonic death or fetal uterine reabsorption. Agenesia of the dental germ was frequently found.


Author(s):  
R. A. Turner ◽  
A. E. Rodin ◽  
D. K. Roberts

There have been many reports which establish a relationship between the pineal and sexual structures, including gonadal hypertrophy after pinealectomy, and gonadal atrophy after injection of pineal homogenates or of melatonin. In order to further delineate this relationship the pineals from 5 groups of female rats were studied by electron microscopy:ControlsPregnant ratsAfter 4 weekly injections of 0.1 mg. estradiol benzoate.After 8 daily injections of 150 mcgm. melatonin (pineal hormone).After 8 daily injections of 3 mg. serotonin (melatonin precursor).No ultrastructural differences were evident between the control, and the pregnancy and melatonin groups. However, the estradiol injected animals exhibited a marked increase in the amount and size of rough endoplasmic reticulum within the pineal cells.


Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
F Namjooyan ◽  
M Panahi ◽  
F Ahmadpour ◽  
A Darvish ◽  
M Azemi ◽  
...  

2019 ◽  
Vol 25 (1) ◽  
Author(s):  
ASHOK KUMAR ◽  
ALPANA PARMAR ◽  
ANAND KUMAR BAJPEYEE

Young female Black rat (Rattus rattus), were administered monthly long acting steroid contraceptive to induce hypertriglyceridemia. It was observed that by 3 weeks of the second injection of estrogen containing mixed type of contraceptive, female rats developed consistent and frank hyperglyceridemia . TG in the treated rats was 195.8 ± 7.44 mg /100 ml as compared to 91.5 ± 6.27 mg/100ml in plasma of the control group.


1953 ◽  
Vol 14 (2) ◽  
pp. 181-188 ◽  
Author(s):  
Bengt Engfeldt ◽  
Gösta T. Hultquist

1964 ◽  
Vol 45 (4_Suppl) ◽  
pp. S139-S153 ◽  
Author(s):  
K. Junkmann ◽  
F. Neumann

ABSTRACT Experiments are described dealing with the mechanism of action of 6-chloro-Δ6-1,2α-methylene-17α-hydroxyprogesterone-acetate with regard to its anti-masculine effect on male rat foetuses, when administered to pregnant rats. It was shown that a marked direct anti-androgenic effect due to a competitive action on androgen receptors within the target organs, is probably the explanation of the mechanism of action. It was further shown that an oestrogenic effect or an appreciable inhibition of the pituitary gland respectively, can be ruled out as causative factors in the mechanism of action.


1966 ◽  
Vol 53 (4) ◽  
pp. 547-552 ◽  
Author(s):  
C. Göran Hansson ◽  
Lennart Angervall
Keyword(s):  

ABSTRACT Geometrically increasing doses of cortisone (0.5, 1.5 and 4.5 mg twice daily) were injected into pregnant rats, and the volume, nuclear diameters and mitotic rate of the maternal parathyroids as well as the parathyroid volume and mitotic rate in the foetuses were determined. The nuclear diameters were if anything smaller and the mitotic rate tended to decrease in the cortisone treated groups. There were no significant differences between the parathyroid volumes of the foetuses in the control and cortisone-treated groups. Thus, it seems that the development of the rat foetal parathyroids and the morphology of the maternal parathyroids are little affected if at all, by cortisone.


1968 ◽  
Vol 59 (2) ◽  
pp. 227-234 ◽  
Author(s):  
H. C. Moore ◽  
I. Cserhati ◽  
F. P. Biliczki

ABSTRACT Experimental deciduomata and progesterone together lower the blood pressure in the steroid hypertensive rat from the 5th to 10th day of decidual growth i. e. from the 10th to 15th day of pseudopregnancy. This would suggest that the fall of blood pressure at an equivalent time of gestation in hypertensive pregnant rats could be due to the maternal decidua under the influence of progesterone. It is further considered that the metrial gland of the deciduoma is more likely to be responsible for the hypotensive effect and by comparison that the metrial gland is implicated in the hypotensive effect of pregnancy. Progesterone alone also exerts a minor hypotensive effect in those animals in which a nephrectomy forms part of the hypertension regimen and indicates one way in which a maternal renal factor could influence blood pressure responses in hypertensive pregnant rats.


Reproduction ◽  
2000 ◽  
pp. 143-149 ◽  
Author(s):  
RM Sainz ◽  
RJ Reiter ◽  
JC Mayo ◽  
J Cabrera ◽  
DX Tan ◽  
...  

Pregnancy is a physiological state accompanied by a high energy demand of many bodily functions and an increased oxygen requirement. Because of the increased intake and utilization of oxygen, increased levels of oxidative stress would be expected. In the present study, the degree of lipid peroxidation was examined in different tissues from non-pregnant and pregnant rats after the delivery of their young. Melatonin and other indole metabolites are known to be direct free radical scavengers and indirect antioxidants. Thus the effect of pinealectomy at 1 month before pregnancy on the accumulation of lipid damage was investigated in non-pregnant and pregnant rats after the delivery of their young. Malonaldehyde and 4-hydroxyalkenal concentrations were measured in the lung, uterus, liver, brain, kidney, thymus and spleen from intact and pinealectomized pregnant rats soon after birth of their young and at 14 and 21 days after delivery. The same parameters were also evaluated in intact and pinealectomized non-pregnant rats. Shortly after delivery, lipid oxidative damage was increased in lung, uterus, brain, kidney and thymus of the mothers. No differences were detected in liver and spleen. Pinealectomy enhanced this effect in the uterus and lung. It is concluded that during pregnancy high levels of oxidative stress induce an increase in oxidative damage to lipids, which in some cases is inhibited by the antioxidative actions of pineal indoles.


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