• Title/Summary/Keyword: pregnant rat

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Effect of Tota1 Saponin from Red Ginseng on Acvtivities of Antioxidant Enzymes in Pregnant Rats (홍삼 사포닌이 수태중인 흰쥐의 항산화 효소활성에 미치는 영향)

  • Song, Yong-Bum;Kwak, Yi-Seong;Park, Ki-Hyun;Chang, Sung-Keun
    • Journal of Ginseng Research
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    • v.26 no.3
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    • pp.139-144
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    • 2002
  • Pregnancy is a physiological state accompained 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. So we observed the activities of the hepatic antioxidant enzymes from rat treated with total saponin from the red ginseng against free raicals produced in pregnant rats. The activity of superoxide dismutase (SOD) in the control group was slightly decreased during pregnancy, and SOD activity in total saponin treated group was not observed any siginificant change compared with the control group. The activities of glutathione peroxidase (GPX), glutathione reductase (GRD) and catalase in the control group have shown the decreasing tendency during pregnancy, whereas the activities of GRD and catalase in total saponin treated group showed significant increased tendency compared with the control group. GPX activity in total saponin treated group was slightly decreased tendnency compared with the control group. The activity of glutathione-S-transferase (GST) in the control group was increased to keep the state of homaeostasis tendency in pregnant rats. On the other hand, the activity of GST after total saponin treatment was increased than control group. Activity of all enzymes in the control group and total saponin treated group recovered the normal level after delivery of rats. In spite of the physiological changes in vivo, the inflaunce of total saponin on activaties of hepatic antioxidant enzyme in pregnant rats seems to be regulated the biological homeostatic adaptation mechanism which protects the maternal liver aganist oxygen induced toxicity

THE EFFECTS OF IRRADIATION AND CALCIUM-DEFICIENT DIET ON DENTIN AND CEMENTUM FORMATION OF RAT MOLAR (방사선조사와 저칼슘식이가 백서구치의 상아질과 백악질형성에 미치는 영향에 관한 실험적 연구)

  • Shin Jae-Chang;Hwang Eui-Hwan;Lee Sang-Rae
    • Journal of Korean Academy of Oral and Maxillofacial Radiology
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    • v.28 no.1
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    • pp.87-109
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    • 1998
  • The present study was designed to elucidate the effects of the Co-60 γ irradiation and/or calcium­deficient diet on the dentin and cementum formation of rat molar. The pregnant three-week old Sprague­Dawley rats were used for the study. The experimental group was divided into two groups, irradiation/normal diet group and irradiation/calcium-deficient diet group. The control group was non­irradiation/normal diet group. The abdomen of the rats at the 19th day of pregnancy were irradiated with single absorbed dose of 350cGy. The rat pups were sacrificed on the 14th day after delivery and the maxillae including molar tooth germ were taken. The specimens including the 1st molar tooth germ were prepared to make tissue sections for light and transmission electron microscopy. Some of tissue sections for light microscopy were stained immunohistochemically with anti-fibronectin antibody. The results were as follows; 1. The Hertwig's epithelial root sheath cells, which are related to the differentiation of the tooth-forming cells, showed irregular cellular arrangement, decrease of intercellular junctional complex, and decreased immunoreactivity to the fibronectin after irradiation. These were more severe in the irradiation/calcium-deficient diet group. 2. The cementoblasts at the cementum-forming area showed chromatin clumpings after irradiation. The immu noreactivity to the fibronectin was weaken after irradiation, especially irradiation/calcium-deficient diet group. 3. The odontoblasts at the dentin-forming area showed increase of lysosomes in the cytoplasm and destruction of intercellular junctional complex. The irradiation/calcium-deficient diet group showed decrease of number and density of the electron dense particles and a large number of vacuoles scattered in the dentin matrix. The immunoreactivity was weaken.

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THE EFFECTS OF CALCIUM-DEFICIENT DIET AFTER IRRADIATION ON THE PERIODONTAL TISSUE FORMATION IN RAT PUPS (방사선조사와 저칼슘식이가 성장기 백서의 치주조직에 미치는 영향에 관한 실험적 연구)

  • Jun Chan-Duk;Hwang Eui-Hwan;Lee Sang-Rae
    • Journal of Korean Academy of Oral and Maxillofacial Radiology
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    • v.28 no.1
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    • pp.171-191
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    • 1998
  • The present study was designed to elucidate the effects of the Co-60 γ irradiation and/or calcium-deficient diet on the periodontal tissue formation in rat pups. The pregnant three-week old Sprague-Dawley rats were used for the study. The experimental group was divided into two groups, irradiation/normal diet group (Group 2) and irradiation/calcium-deficient diet group (Group 3). The control group was non-irradiation/normal diet group (Group 1). The abdomen of the rats at the 19th day of pregnancy were irradiated with single absorbed dose of 350 cGy. The rat pups were sacrificed on the 14th day after delivery, and the maxillae including molar tooth germ were taken. The specimens including the 1st molar tooth germ were prepared to make tissue sections for light and transmission electron microscopy. Some of tissue sections for light microscopy were stained immunohistochemically with anti-fibronectin and anti-osteonectin antibodies. The results were as follows; 1. In the periodontal ligament forming area, the fibroblasts of Group Z showed irregular arrangement and low activity. The immunoreactivity between the fibroblasts and collagen fibers was decreased, compared with Group 1. The fibroblasts of Group 3 showed atrophic change and clumped nucleus. The collagen fibers showed cystic change and low immunoreactivity to the fibronectin. 2. In the cementum forming area, the cementoblasts of Group 2 showed decrease of number and atrophic change. The cementoblasts of Group 3 showed edematous change, atrophy of cytoplasm, and clumping of nucleus. 3. In the alveolar bone forming area, the bone of Group 2 was thin and various degree of immunoreactivity to the osteonectin. Group 3 showed edematous osteoblasts, fibrous degeneration of bone marrow, and weak immunoreactivity to the osteonectin.

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Immunohistochemical study on the atretic and the growing follicles after experimental superovulation in rats 2. Atresia and growing of follicles (과배란 유기된 rat 난소에 퇴축난포와 성장난포에 대한 면역조직화학적 연구 2. 동원된 난포의 퇴축과 성장에 대하여)

  • Kwak, Soo-dong;Koh, Phil-ok;Kim, Chong-sup
    • Korean Journal of Veterinary Research
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    • v.37 no.1
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    • pp.79-86
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    • 1997
  • This study was designed to investigate the effects of superovulation on the growing and mature follicles following gonadotrophin treatments in mature rat by immunohistochemical methods. Eighteen mature rats (Sprague-Duwely, 190~230gm) were randomly alloted into 3 groups. One group was control group, another FSH-treated group was injected intramuscularly with 0.5 units of follicular stimulating hormone(FSH) / rat, and third PMS and HCG-treated group was injected intramuscularly with 20~25IU of pregnant mare serum(PMS) / rat and then at the 48 hrs later, with 20~25IU of human chorionic gonadotropin(HCG) / rat. Half the number of rats were administrated intraperitoneally with bromodeoxyuridine(Brdur, 0.2mg/gm BW once) at 2 hours before exanguination and the remainder of rats were sacrified without Brdur administration. The investigation by immunohistochemical methods using paraffin sections of ovaries was performed by using anti-Brdur antibody and PCNA(proliferating cell nuclear antigen) antibody for labeling proliferating cells in follicles. In immunohistochemical findings, follicles squeezed by peripheral corpus luteum or follicles large follicles with loosly and irregularly distributed granulosa cells and although with compacted granulosa cells, middle follicles with dilated round or oval follicular antrum were confirmed as atretic follicles. The proportions of atretic follicles in control group were 29.8%, 21.7% and 14.2% respectivley at large, middle and small follicles and mean proportions of these all 3 grade follicles were 26.7%. The proportions of atretic follicles in FSH-treated group were 35.4%, 24.9% and 10.4% respectively at large, middle and small follicles and mean proportions of these all 3 grade follicles were 28.1%. The proportions of atretic follicles in PMS and HCG-treated group were 44.7%, 24.0% and 12.7% respectively at large, middle and small follicles, and mean proportions of these all 3 grade follicles were 29.7%. The above findings reveal that the group with higher proportion of atretic follicles were ordered as large, middle and small follicles in size, and these proportions were increased in hormone treated two groups with more number of more growing and mature follicles when compared with control group.

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Production of a Normal Calf from Bovine Embryo Microinjected with Human Growth Hormone Gene (사람 성장호르몬 유전자가 미세주입된 체외수정란 유래의 송아지 생산)

  • 손동수;김선정;김일화;서국현;이광원;상병돈;박무균;이철상;한용만
    • Journal of Embryo Transfer
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    • v.9 no.3
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    • pp.229-234
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    • 1994
  • This experiment was carried out to develop the model system for mass production of biomedical and nutritional proteins (human proteins) through mamraary gland of the transgenic cattle produced by gene manipulation and embryological technologies. Human growth hormone gene fused with rat $\beta$-casein gene promoter was microinjected into pronuclei of one cell bovine embryos produced by in vitro fertilization. After microinjection, embryos were cultured in vitro for 6 or 7 days. Twenty embryos reaching to blastocysts were transferred to 10 beef recipients, each receiving two embryos. Recipients were diagnosed for pregnancy by rectal palpation at 76 days after embryo transfer. One of them was pregnant to term and produced a female calf weighing 21 kg at 280 days following embryo transfer. DNA was extracted from umbilical cord tissue and blood of calf born for confirming gene insertion. As determined by Southern hybridization, the transgene was not found.

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Historical Control Data for Developmental Toxicity Study in Sprague-Dawley Rats (Sprague-Dawley 랫드를 이용한 발생독성시험의 기초자료연구)

  • 김종춘;이상준;배진숙;박종일;김용범;정문구
    • Toxicological Research
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    • v.17 no.2
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    • pp.83-90
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    • 2001
  • The background control data were compiled from rat developmental toxicity studies con-ducted at Toxicology Research Center, KRICT during the 1993-1999 period. These data were assembled in order to provide background in formation for the maternal and fetal data collected in 13 developmental toxicity studies using Sprague-Dawley rats. A total of 325 mated females were used in these studies during the seven-year period and overall pregnancy rate of these females was 93.8%. The present background control data included body weights, food consumption, hematological values, and organ weights of pregnant females, caesarean section data, and fetal examination data. These data can be used not only as a historical database for the meaningful interpretation of data from reproductive and developmental toxicity studies, but also as a contribution to biological characterization oj Sprague-Dawley rats.

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GESTATIONAL EXPOSURE TO NONYLPHENOL CAUSE PRECOCIOUS MAMMARY GLAND DEVELOPMENT IN FEMALE RATS

  • Moon, Hyun-Ju;Kim, Hyung-Sik;Shin, Jae-Ho;Kang, Il-Hyun;Kim, Tae-Sung;Suzanne. E. Fenton;Han, Soon-Young
    • Proceedings of the Korean Society of Toxicology Conference
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    • 2001.10a
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    • pp.175-175
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    • 2001
  • This experiment tested whether in utero and lactational exposure to 4-nonylphenol (NP) alters mammary gland differentiation in the female offspring rat. Pregnant Sprague Dawley rats were administered NP (l0, 100 mg/kg), atrazine (l00 mg/kg), pesticide demonstrating antiestrogenic activity in mammary gland development, or vehicle (0.5% methyl cellulose) by oral gavage from gestation day 15-19.(omitted)

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BEHAVIORAL TERATOGENICITY OF METHAMPHETAMINE

  • Chin, Kang;Cho, Dae-Hyun;Cho, Tae-Soon
    • Toxicological Research
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    • v.6 no.2
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    • pp.121-130
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    • 1990
  • Pregnant Wister rats were given daily subcutaneous administrations of methamphetamine (MAPT; varying doses ranging from 1.0 to 4.5mg/kg) from days 7 to20 of gestation and teratogenic effects have been determined. The teratogenic effects inducible with orally administered caffeine (90mg/kg/day)for the same durations were used as the positive controls. MAPT doses greater than 2.0 mg/kg have suppressed the rate of maternal weight gain. Some of the offsprings (F1) of the prenatal MAPT treated groups had decreased growth rate and delayed development of physical characters and functional reflexes. The male offsprings of the MAPT treated groups had significant decreases in their spontaneous motor activity but had enhanced conditioned avoidance responses. However, the mating performances of these offsprings were not affected. These results indicated that prenatal exposure of MAPT may induce some behavioral teratogenicity in rats.

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Reproductive Toxicity Study of Aspalatone, A New Antithrombetic Agent: Teratogenicity Study in Rats (항혈전제 아스파라톤의 생식독성연구:랫드 최기헝성시험)

  • 정문구;이상준;김종춘;송시환
    • Biomolecules & Therapeutics
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    • v.6 no.2
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    • pp.151-158
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    • 1998
  • Aspalatone, a new antithrombotic agent, was administered orally to pregnant Sprague-Dawley rats during the organogenetic period at dose levels of 0, 20, 100 and 500 mg/kg/day. All dams were subjected to caesarean section on day 20 of pregnancy. Effects of test substance on dams and embryonic development of F1 fetuses were examined There were treatment-related decreases in body weight and food consumption in the 500 mg/kg group. There was a increase in the spleen weight in the 100 and 500 mg/kg groups. Develo-pmental toxicity was evident as decreased fetal body weights and increased fetal malformations in the 500 mg/ kg group. External and skeletal malformations of fetuses occurred at an incidence of 1 and 8.2%, respectively. In addition, there was a delay in ossification of sternebrae and sacrocaudal vertebrae in the 500 mg/kg group. The results show that the no observed adverse effect dose level (NOAEL) for maternal toxicity was 20 mg/kg/ day and for developmental toxicity was 100 mg/kg/day.

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General Pharmacology of DA-125, A New Anthracycline Anticancer Agent (새로운 Anthracycline계 항암제 DA-125의 일반약리작용)

  • Kim, Myung-Suk;Park, Jong-Wan;Kim, Young-Hoon;Kim, Soon-Hoe;Shin, Myeong-Soo;Kim, Won-Bae;Yang, Junn-Ick
    • The Korean Journal of Pharmacology
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    • v.30 no.2
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    • pp.227-242
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    • 1994
  • The general pharmacological effects of a new anthracycline anticancer agent, DA-125 $[7-0-(2,\;6-dideoxy-2-fluoro-{\alpha}-L-talopyranosyl)-adriamycinone-14-{\beta}-alaninate{\cdot}HCI]$ were investigated in mice, rats, guinea pigs, rabbits and dogs. Intravenous administration of DA-125 presented no significant effects on the central and peripheral nervous systems of ICR mice except a decrease in the numbers of acetic acid-induced writhing response at a dose of 10 mg/kg. In anesthetized rats and dogs, DA-125 produced a transient depression of blood pressure and an increase in heart rate, but did not affect the peripheral blood flow in the isolated ear vessels of rabbits and the mechanical functions of the isolated hearts of guinea pigs. No significant effects were observed on the gastrointestinal functions and the contractilities of smooth muscle preparations obtained from guinea pig trachea, rabbit ileum, pregnant and non-pregnant uterus and vas deferens of rats. DA-125 Increased the contractility of the isolated ileum of guinea pigs in a dose range of $10^{-6}{\sim}10^{-9}g/ml$, and also increased, but weaker than adriamycin, the vascular permeability in rat skin. DA-125 had no effect on the kallikrein-induced increase in permeability and the permeability of the visceral organs. DA-125 did not adversely affect the liver function and the blood coagulation system, and did not induce hemolysis in vitro. It is concluded from the results that the general pharmachological effects of DA-125 are similar to or weaker than those of adriamycin, and that little adverse effects are anticipated with a therapeutic dose range.

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