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| Id: | 25573
| | Autor: | Teo, Steve K; Denny, Kevin H; Stirling, David I; Thomas, Steve D; Morseth, Sandy; Hoberman, Alan M
| | Título: | Effects of thalidomide on developmental, peri- and postnatal function in female New Zealand whith rabbits and offspring
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| | Fonte: | s.l; s.n; 2004. 11 p. tab.
| | Resumo: | The present study determined effects of thalidomide on three successive generations of New Zeland Whith rabbits after oral dosing to FO maternal rabbits during the later third of gestation (post major organogenesis) and lactation. On hundred and twenty four time-mated FO rabbits (31/dose) were gaveged with 0,030,150, or 500mg/kg thalidomide from gestation day 18 (DG 18) to lactation day 28 (DP or day postpartum 28) for approximately 42 days. At 6 months, 12 F1 females were randomly paired witthin each dose group and mated. Reproductive evaluation and/or gross necropsy of the thoracic, abodominal, and pelvic viscera was perfomed on day 29 postpartum (DP 29) for FO rabbits, on DP49 for F1 pups not selected for continued evaluation, sfter completion of mating for F1 rabbits, and on DG 29 for F1 rabbits on continued evaluation of F2 litter. There was no thalidomide-related mortality in FO and F1 rabbits. One FO doe at 30 and 150 mg/kg and 2 at 500 mg/kg aborted. Maternal FO rabbits had reductions in feed consumption but no body weight gain during the gestation and lactation periods for 150 and 500 mg/kg. The numbers of does with stillborn and all pups dyving from DP 1-4 was increased at 150 and 500 mg/kg. Mean number of liverborn (litter size) and percentage of live pups were decreased at 500 mg/kg. A significantly increased number of pups died at 150 and 500 mg/kg, resulting in a reduced viability index and decreased litter size. There were some F1 male and female bodyweight reductions at 150 and 500 mg/kg postweaning with no changein feed consumption. F1 Caesarean-sectioning and litter observations were normal. Fertility of F1 offspring was not affected by maternal doses of thalidomide, but the pregnancy index may have been reduced by the 500 mg/kg maternal thalidomide dose. There was an apparent dose-related increased in splayed limbs in F1 pups. Splaving has been reported in New Zealand Whith rabbits and may be a recessive trait. The splay could be caused by the nerve and muscle fiber degeneration and skeletal muscle atrophy observed in some pups. It could also be due to the decreased in litter size, resulting in fewer pups per litter for nursing, leading to rapid weight gain and a failure of the pups to support this weight. No F@ fetal gross external alterations were observed. (AU).
| | Descritores: | COELHOS/anorm
COELHOS/embriol
COELHOS/cresc
TALIDOMIDA/admin
TALIDOMIDA/ef adv
TALIDOMIDA/farmacol
- ABORTO ANIMAL/etiol
PESO AO NASCER/ef drogas
| | Limites: | COELHOS
| | Localização: | BR191.1; 00953/s |
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