scholarly journals Interspecies Comparison of Control Data From Embryo–Fetal Development Studies in Sprague-Dawley Rats, New Zealand White Rabbits, and Göttingen Minipigs

2019 ◽  
Vol 38 (6) ◽  
pp. 476-486
Author(s):  
France-Helene Paradis ◽  
Anne Marie Downey ◽  
Francine Beaudry ◽  
Clémentine Pinêtre ◽  
Sisse Ellemann-Laursen ◽  
...  
Keyword(s):  
New Zealand ◽  
Fetal Development ◽  
Zealand White Rabbit ◽  
Female Rats ◽  
Sprague Dawley ◽  
Skeletal Malformations ◽  
Sprague Dawley Rats ◽  
Study Results ◽  
Data Assessment ◽  
Safety Assessments

Species-dependent differences in relative incidence of spontaneous variations and malformations should be considered in the assessment of the translational value of reproductive and developmental safety assessments. The objective of this evaluation was to compare litter parameters and the frequency of external, visceral, and skeletal malformations and variations across species in the Sprague-Dawley rat, New Zealand White rabbit, and Göttingen minipig and to determine whether notable differences exist. Pregnant female rats (n = 824), rabbits (n = 540), and minipigs (n = 70) from vehicle control groups were included in the analysis, equating to 10,749 rat, 5,073 rabbit, and 378 pig fetuses collected at term by cesarean delivery. Preimplantation loss was more frequent than postimplantation loss in the rat and rabbit, whereas the opposite was observed in the minipig. Several external and visceral malformations and variations such as domed head, bent tail, abdominal edema, and anal atresia were observed in all 3 species. Visceral malformations of the heart and major blood vessels were remarkably more frequent in the minipig and rabbit, respectively; ventricular and atrium septum defects were observed in 1.9% and 2.1%, respectively, for the minipig fetuses, whereas they were observed in equal or less than 0.02% among the rat and rabbit fetuses evaluated in this study. Understanding species-dependent differences in spontaneous variations and malformations can be useful for the interpretation of embryo–fetal development study results. The current analysis identified relevant differences between commonly used species in reproductive toxicology with potential implications for data assessment.

Effect of astragaloside IV on the embryo-fetal development of Sprague-Dawley rats and New Zealand White rabbits

2009 ◽  
Vol 29 (5) ◽  
pp. 381-385 ◽  
Author(s):  
Zhu Jiangbo ◽  
Wan Xuying ◽  
Zhu Yuping ◽  
Ma Xili ◽  
Zheng Yiwen ◽  
...  
Keyword(s):  
New Zealand ◽  
Fetal Development ◽  
Sprague Dawley ◽  
Astragaloside Iv ◽  
Sprague Dawley Rats ◽  
New Zealand White Rabbits

Diabetes in pregnancy: influence of genetic background and maternal diabetic state on the incidence of skeletal malformations in the fetal rat

1986 ◽  
Vol 113 (3_Suppl) ◽  
pp. S66-S73 ◽  
Author(s):  
Ulf J. Eriksson ◽  
V. Elisabeth Dahlström ◽  
Hans O. Lithell
Keyword(s):  
Female Rats ◽  
Blood Levels ◽  
Suitable Model ◽  
Sprague Dawley ◽  
Pregnant Rats ◽  
Diabetic State ◽  
Skeletal Malformations ◽  
Sprague Dawley Rats ◽  
Fetal Rat ◽  
Rat Strain

Abstract. Female Sprague-Dawley rats from two different substrains (denoted U and H rats) were made manifest diabetic (MD) with a single iv injection of streptozotocin 2–4 weeks before mating. In some MD animals insulin treatment was started 1–3 weeks before mating (denoted MDI rats) and in a majority of these animals the treatment was interrupted during two days of pregnancy, i.e. gestational days 2 + 3, 4 + 5, 6 + 7, 8 + 9 or 10 + 11. The pregnant rats were killed on gestational day 20. The offspring of MD and MDI rats of the U substrain showed skeletal malformations (micrognathia and sacral dysgenesis) at a rate up to 19%, whereas the MD and MDI fetuses of the H strain did not display any skeletal malformations. Offspring of the U strain with sacral dysgenesis exhibited lack of a tail and no staining of osseous and cartilagenous tissue in the sacral-caudal region, suggesting total absence of vertebrae. The offspring of the dibetic U rats tended to be more readily resorbed, were smaller and tended to have slightly larger placentae than those of the diabetic H rats. The severity of the diabetic state in pregnant and nonpregnant female rats – as reflected by body and kidney weights, blood levels of HbA1c, carbohydrate and lipid metabolites – did not differ significantly between the U and H rats. These results are in concert with the notion that congenital malformations result from a teratogenic insult in a genetically predisposed organism. The described malformation-prone rat strain (U) may be a suitable model for the future elucidation of teratological mechanisms in diabetic pregnancy.

scholarly journals An embryo-fetal development toxicity study with dimethylaminoethyl ginkgolide B in rats and rabbits

2018 ◽  
Vol 7 (6) ◽  
pp. 1225-1235
Author(s):  
Ronghua Li ◽  
Tingting Zhang ◽  
Mei Qin ◽  
Peng Yue ◽  
Ming Cai ◽  
...  
Keyword(s):  
New Zealand ◽  
Fetal Development ◽  
Toxicity Study ◽  
Ginkgolide B ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
New Zealand White Rabbits

The potential effects of dimethylaminoethyl ginkgolid B on pregnant dams and embryo-fetal development had been investigated in both Sprague-Dawley rats and New Zealand white rabbits.

scholarly journals Effects of ovariectomy and estrogen on ischemia-reperfusion injury in hindlimbs of female rats

2001 ◽  
Vol 91 (4) ◽  
pp. 1828-1835 ◽  
Author(s):  
Nicole Stupka ◽  
Peter M. Tiidus
Keyword(s):  
Muscle Damage ◽  
Ischemia Reperfusion Injury ◽  
Serum Insulin ◽  
Ischemia Reperfusion ◽  
Neutrophil Infiltration ◽  
Female Rats ◽  
Protective Effects ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
17Β Estradiol

The effects of estrogen and ovariectomy on indexes of muscle damage after 2 h of complete hindlimb ischemia and 2 h of reperfusion were investigated in female Sprague-Dawley rats. The rats were assigned to one of three experimental groups: ovariectomized with a 17β-estradiol pellet implant (OE), ovariectomized with a placebo pellet implant (OP), or control with intact ovaries (R). It was hypothesized that following ischemia-reperfusion (I/R), muscle damage indexes [serum creatine kinase (CK) activity, calpain-like activity, inflammatory cell infiltration, and markers of lipid peroxidation (thiobarbituric-reactive substances)] would be lower in the OE and R rats compared with the OP rats due to the protective effects of estrogen. Serum CK activity following I/R was greater ( P < 0.01) in the R rats vs. OP rats and similar in the OP and OE rats. Calpain-like activity was greatest in the R rats ( P < 0.01) and similar in the OP and OE rats. Neutrophil infiltration was assessed using the myeloperoxidase (MPO) assay and immunohistochemical staining for CD43-positive (CD43+) cells. MPO activity was lower ( P < 0.05) in the OE rats compared with any other group and similar in the OP and R rats. The number of CD43+ cells was greater ( P < 0.01) in the OP rats compared with the OE and R rats and similar in the OE and R rats. The OE rats had lower ( P < 0.05) thiobarbituric-reactive substance content following I/R compared with the R and OP rats. Indexes of muscle damage were consistently attenuated in the OE rats but not in the R rats. A 10-fold difference in serum estrogen content may mediate this. Surprisingly, serum CK activity and muscle calpain-like activity were lower ( P< 0.05) in the OP rats compared with the R rats. Increases in serum insulin-like growth factor-1 content ( P < 0.05) due to ovariectomy were hypothesized to account for this finding. Thus both ovariectomy and estrogen supplementation have differential effects on indexes of I/R muscle damage.

scholarly journals Apple Pomace Consumption Favorably Alters Hepatic Lipid Metabolism in Young Female Sprague-Dawley Rats Fed a Western Diet

Nutrients ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1882 ◽  
Author(s):  
Roy Skinner ◽  
Derek Warren ◽  
Soofia Lateef ◽  
Vagner Benedito ◽  
Janet Tou
Keyword(s):  
Lipid Metabolism ◽  
Apple Pomace ◽  
Western Diet ◽  
Sprague Dawley ◽  
Hepatic Lipid Metabolism ◽  
Study Objective ◽  
Hepatic Lipid ◽  
Sprague Dawley Rats ◽  
Study Results ◽  
Isocaloric Diets

Apple pomace, which is a waste byproduct of processing, is rich in several nutrients, particularly dietary fiber, indicating potential benefits for diseases that are attributed to poor diets, such as non-alcoholic fatty liver disease (NAFLD). NAFLD affects over 25% of United States population and is increasing in children. Increasing fruit consumption can influence NAFLD. The study objective was to replace calories in standard or Western diets with apple pomace to determine the effects on genes regulating hepatic lipid metabolism and on risk of NAFLD. Female Sprague-Dawley rats were randomly assigned (n = 8 rats/group) to isocaloric diets of AIN-93G and AIN-93G/10% w/w apple pomace (AIN/AP) or isocaloric diets of Western (45% fat, 33% sucrose) and Western/10% w/w apple pomace (Western/AP) diets for eight weeks. There were no significant effects on hepatic lipid metabolism in rats fed AIN/AP. Western/AP diet containing fiber-rich apple pomace attenuated fat vacuole infiltration, elevated monounsaturated fatty acid content, and triglyceride storage in the liver due to higher circulating bile and upregulated hepatic DGAT2 gene expression induced by feeding a Western diet. The study results showed the replacement of calories in Western diet with apple pomace attenuated NAFLD risk. Therefore, apple pomace has the potential to be developed into a sustainable functional food for human consumption.

Infarct size is increased in female post-MI rats treated with rapamycin

2009 ◽  
Vol 87 (6) ◽  
pp. 460-470 ◽  
Author(s):  
Claude Lajoie ◽  
Viviane El-Helou ◽  
Cindy Proulx ◽  
Robert Clément ◽  
Hugues Gosselin ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Female Rats ◽  
Coronary Artery Ligation ◽  
Female Rat ◽  
Sprague Dawley ◽  
Ischemic Insult ◽  
Fibrotic Response ◽  
Artery Ligation ◽  
Sprague Dawley Rats ◽  
Scar Healing

Rapamycin represents a recognized drug-based therapeutic approach to treat cardiovascular disease. However, at least in the female heart, rapamycin may suppress the recruitment of putative signalling events conferring cardioprotection. The present study tested the hypothesis that rapamycin-sensitive signalling events contributed to the cardioprotective phenotype of the female rat heart after an ischemic insult. Rapamycin (1.5 mg/kg) was administered to adult female Sprague–Dawley rats 24 h after complete coronary artery ligation and continued for 6 days. Rapamycin abrogated p70S6K phosphorylation in the left ventricle of sham rats and the noninfarcted left ventricle (NILV) of 1-week postmyocardial-infarcted (MI) rats. Scar weight (MI 0.028 ± 0.006, MI+rapamycin 0.064 ± 0.004 g) and surface area (MI 0.37 ± 0.08, MI+rapamycin 0.74 ± 0.03 cm2) were significantly larger in rapamycin-treated post-MI rats. In the NILV of post-MI female rats, rapamycin inhibited the upregulation of eNOS. Furthermore, the increased expression of collagen and TGF-β3 mRNAs in the NILV were attenuated in rapamycin-treated post-MI rats, whereas scar healing was unaffected. The present study has demonstrated that rapamycin-sensitive signalling events were implicated in scar formation and reactive fibrosis. Rapamycin-mediated suppression of eNOS and TGF-β3 mRNA in post-MI female rats may have directly contributed to the larger infarct and attenuation of the reactive fibrotic response, respectively.

scholarly journals Hypertensive female Sprague-Dawley rats require an intact nitric oxide synthase system for compensatory increases in renal regulatory T cells

2020 ◽  
Vol 319 (2) ◽  
pp. F192-F201
Author(s):  
Lindsey A. Ramirez ◽  
Ellen E. Gillis ◽  
Jacqueline B. Musall ◽  
Riyaz Mohamed ◽  
Elizabeth Snyder ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
T Cells ◽  
Angiotensin Ii ◽  
Nitric Oxide Synthase ◽  
Regulatory T Cells ◽  
Female Rats ◽  
Sprague Dawley ◽  
Albumin Excretion ◽  
Sprague Dawley Rats ◽  
Oxide Synthase

We have previously shown that hypertensive female rats have more regulatory T cells (Tregs), which contribute more to blood pressure (BP) control in female versus male rats. Based on known protective properties of Tregs, the goal of the present study was to investigate the mechanisms by which female rats maintain Tregs. The present study was designed to 1) compare the impact of three hypertension models on the percentage of renal Tregs and 2) test the hypothesis that nitric oxide synthase (NOS) inhibition prevents increases in renal Tregs and exacerbates renal damage in female Sprague-Dawley rats. Rats (11–14 wk old) were randomized to one of the following four groups: control, norepinephrine (NE) infusion, angiotensin II infusion, or the NOS inhibitor Nω-nitro-l-arginine methyl ester (l-NAME) in drinking water. BP was measured via tail cuff. After 2 wk of treatment, kidneys were isolated and processed to measure Tregs via flow cytometric analysis and renal injury via urinary albumin excretion, plasma creatinine, and histological analyses. Hypertensive treatments increased BP in all experimental animals. Increases in BP in norepinephrine-and angiotensin II-treated rats were associated with increases in renal Tregs versus control. In contrast, l-NAME treatment decreased Tregs compared with all groups. l-NAME treatment modestly increased albumin excretion. However, plasma creatinine was comparable among the groups, and there was no histological evidence of glomerular or tubular injury. This study provides insights into the mechanisms regulating renal Tregs and supports that an intact NOS system is crucial for female rats to have BP-related increases in renal Tregs.

Impaired follicular development and endocrine disorders in female rats by prepubertal exposure to toxic doses of cadmium

2020 ◽  
Vol 36 (2) ◽  
pp. 63-75
Author(s):  
Saman Saedi ◽  
Mohammad Reza Jafarzadeh Shirazi ◽  
Mohammad Javad Zamiri ◽  
Mehdi Totonchi ◽  
Mohammad Dadpasand ◽  
...  
Keyword(s):  
Steroid Hormones ◽  
Endocrine System ◽  
Follicular Development ◽  
Female Rats ◽  
High Dose ◽  
Endocrine Disorders ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Puberty Onset ◽  
Different Doses

Cadmium (Cd) has been associated with several physiological problems including reproductive and endocrine system dysfunction resulting in temporary infertility. The principal objective of this project was to investigate the effects of prepubertal exposure to toxic doses of Cd on puberty onset, the endocrine system, and follicular development. For this purpose, 16 female Sprague-Dawley rats weaned on postnatal day (PND) 21 were randomly divided into 4 groups ( n = 4 per group). The treatments were as follows: 0, 25, 50, and 75 mg/kg/day of cadmium chloride (CdCl2) by oral gavage from PND 21 to observation of first vaginal opening (VO). The results demonstrated that prepubertal exposure to different doses of CdCl2 delays the age of VO, first diestrus, and first proestrus via altering the concentrations of estradiol and progesterone. The low level of these steroid hormones contributed to lower differentiation and maturation of follicles and it finally led to reduced ovarian reservoir of follicles and impaired follicular development. The number of atretic follicles and secondary follicles with premature cavity increased in rats that received a high dose of CdCl2, whereas the number of secondary follicles and corpora luteum decreased in the same circumstances. Taken together, these data suggest that prepubertal exposure to toxic doses of Cd delays the onset of puberty via disorderliness in the concentration of steroid hormones and reduces the ovarian reservoir of follicles, as well as folliculogenesis.

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