• Title/Summary/Keyword: Biochemical changes

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Effects of TGF ${\beta}_1$ on the Growth and Biochemical Changes in Cultured Rat Glial Cells (Transforming growth factor ${\beta}_1$이 배양랫트 신경교세포의 성장 및 생화학적 변화에 미치는 영향)

  • Kim, Yong-Sik;Youn, Yong-Ha;Park, Nan-Hyang;Park, Chan-Woong
    • The Korean Journal of Pharmacology
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    • v.30 no.2
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    • pp.167-179
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    • 1994
  • Recent evidence indicates that glial cells have a wide range of funtions which are critical for maintaining a balanced homeostatic environment in the central nervous system(CNS) peripheral nervous system(PNS). Morever, astrocytes are known to participate in the tissue repair and neuroimmunologic events within the CNS through many kinds of growth factors and cytokines. We investigated the effect of $TGF\;{\beta}_1$, on the growth and biochemical changes of rat glial cells in culture. The proliferative effect was determined by $^3H-thymidine$ uptake and the double immunostain with anti-cell-specific marker and anti-Bromodeoxyuridine(BrdU) antibody. To check the effect of biochemical changes we compared the amounts of glial fibrillar acidic protein(GFAP) and the activity of glutamine synthetase(GS) in astrocyte. And the amounts of myelin basic protein and the activity of 2',3'-cyclic nucleotide phosphohydrolase(CNPase) were measured in oligodendrocyte and the amounts of peripheral myelin in Schwann cell. When $TGF\;{\beta}_1$, was treated for 2 days with cultured glial cell, $TGF\;{\beta}_1$, decreased the $^3H-thymidine$ uptake and proliferation index of double immunostain of astrocytes, which indicates the inhibition of astroglial DNA synthesis, but stimulated the growth of Schwann cell. Also, $TGF\;{\beta}_1$, decrease the GS activity and increased the amounts of GFAP in astrocyte. In the case of Schwann cells the amounts of peripheral myelin was increased when treated with $TGF\;{\beta}_1$. However, $TGF\;{\beta}_1$, didn't show any effect on the proliferation and biochemical changes in oligodendrocyte. These results suggest that $TGF\;{\beta}_1$, might have a critical action in the regulation of proliferation and biochemical changes in glial cells, especially astrocyte.

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Effects of Different Dietary Oil and d-Limonene on Histopathological and Biochemical Changes in Experimental Hepatocarcinogenesis (식이지방의 종류 및 d-Limonene 투여가 간 발암과정에 미치는 영향)

  • 이미숙;김정희
    • Journal of Nutrition and Health
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    • v.33 no.1
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    • pp.23-32
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    • 2000
  • The purpose of this study was to investigate the effcts of n-3, n-6 fatty arid and d-limonene on histopathological and biochemical changes in experimental rat hepatocarcinogenesis. To attain the above objectives, weanling Sprague-Dawley female rats were intraperitoneally injected twice with a dose of diethylnitrosamine(DEN, 50mg/kg body weight) and after 1 week 0.05% phenobarbital was provided with water. Sardine oil rich in n-3 fatty acids and corn oil rich in n-6 fatty acids were fed at 15% by weight and 5% d-limonene was added to the diet in each group. Ten weeks or 20 weeks after DEN treatment, rats were sacrifirced. The formation of glutathione S-transferase placental form positive(GST-P$\^$+/) foci was significantly decreased by the treatment of either sardine oil or d-limonene HMG-CoA reductase activity was not affected by dietary oils and d-limonene. Protein kinase C (PKC) activity was decreased by either sardine oil or d-limonene. Particularly d-limonene decreased the membrane PKC activity. Membrane Cholesterol/Phospholipid(Chol/PL) ratio was significantly decreased by d-limonene in sardine oil group. The data showed that GST-P$\^$+/ foci number was positively correlated with membrane PKC activity and serum cholesterol and negatively correlated with liver cholesterol level. These results suggest informations about the correlation between histopathological and biochemical changes such as cholesterol metabolism and PKC activity in experimental hepatocarcinogenesis and thereby can elucidate the possible mechanism related to the cancer inhibition.(Korean J Nutrition 33(1) : 23-32, 2000)

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Physio-biochemical changes correlated with cadmium adaptation and detoxification mechanism in klebsiella aerogenes (Klebsiella aerogenes의 카드뮴 적응 및 해독기작에 관련된 생리생화학적인 변화)

  • 이기성;송인극;박영식;윤성녀;최영길
    • Korean Journal of Microbiology
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    • v.28 no.3
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    • pp.249-257
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    • 1990
  • In the course of operating the accommodative and detoxifying mechanism against cadmium, its physio-biochemical changes were observed in Klebsiella aerogenes ATCC 10031. Changes of enzyme activity concerned phosphate metabolism, changes of phospholipid composition and in view of energy metabolism the changes of the nucleotide pool were examined. Activities of both alkaline and acid phosphatase were derepressed 4-10 folds under cadmium added cultures. Moreover, production of phospholipid such as lysophosphatidyl choline (LPC), phosphatidyl serine (PS) and phosphatidyl ethanolamone (PE) was increased and uridylate nucleotide pool was increased under Cd-surplus culture. These results i.e. overproduction of phosphatase catalyzing phosphate residue, increase of the production of PE and PS which have a close affinity with cadmium, and indrease of uridylate nucleotide pool used as a carrier of polysaccharide synthesis like bacterial capsule exhibited cellular responses for active defence against Cd-pressure. It was postulated that these phenomena should play another assistant roles in Cd-detoxifing mechanism.

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BLOOD CHEMICAL ALTERATIONS IN EXPERIMENTAL Setaria cervi INFECTION IN RABBITS

  • Kumar, M.;Joshi, H.C.
    • Asian-Australasian Journal of Animal Sciences
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    • v.6 no.4
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    • pp.491-495
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    • 1993
  • Adult male and female Setaria cervi worms were implanted in the peritoneal cavity of rabbits to develop microfilaraemia. These infected rabbits revealed non-significant rise in total protein, significant reduction in albumin content and albumin-globulin ratio and significant increase in globulin and total bilirubin. The levels of total cholesterol, blood urea nitrogen and urea in blood were elevated from day 20 to 40, 25 to 70 and 30 to 70 respectively whereas, uric acid remained high from day 25 to 50 and creatinine from 15th day to 50th day of worm implantation. Biochemical changes suggested the involvement of liver and kidney in the infected rabbits.

An Experimental Study of Jeongjihwan(定志丸) on the Biochemical Changes in Brain Tissue and the Damages of the Neuron (정지환(定志丸)이 뇌조직(腦組織)의 생화학적(生化學的) 변화(變化)와 신경세포(神經細胞)의 손상(損傷)에 미치는 실험적(實驗的) 연구(硏究))

  • Choi, Yong-Joon;Sung, Kang-Kyung;Moon, Byung-Soon
    • The Journal of Korean Medicine
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    • v.19 no.1
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    • pp.392-409
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    • 1998
  • The present experiment was designed to examine the effects of Jeongjihwan on carecholamines, serotonin, amino acids, lipid peroxide, free radical scavenging activity, malondialdehyde and superoxide dismutase activity in senile brain. It was performed by administering Jeongjihwan extracts of a variety of concentration to senile rats to experimentally determine effects of Jeongjihwan on biochemical changes in senile brain and examine protective effects against neurotoxin. To examine survival rate, the rat's spinal cord sensory ganglion cell pretreated in Jeongjihwan extracts was cultured in oxygen free radical. The results were summarized as follows: 1. Jeongjihwan significantly increased noradrenaline in the hippocampus and hypothalamus of the brain tissue of senile rats, and even though Jeongjihwan increased noradrenaline also in other brain tissue, there was no significance. 2. Jeongjihwan had no effects on dopamine changes in all brain tissue of senile rats. 3. Jeongjihwan significantly increased serotonin, but decreased in other brain tissue. 4. Jeongjihwan increased amino acid in the brain tissue of senile rats. 5. Jeongjihwan significantly decreased lipid peroxide and free radical in the brain tissue of senile rats. 6. Jeongjihwan significantly increased survival rate of nerve cell exposed to oxygen free radical. According to the above results, Jeongjihwan is assumed to improve brain function by reacting on biochemical changes of the senile brain and carries effects of protecting against neurocytotoxicity, and that Jeongjihwan can be used to treat regressive brain disease carrying symptoms of psychoactive disorders.

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Anatomical and biochemical Changes of Corn Roots Infected with Pratylenchus vulnus (사과뿌리썩이선충의 침입과 기주의 해부학적 및 생화학적 변화에 관한 연구)

  • 한혜림;한상찬;김용균
    • Korean journal of applied entomology
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    • v.34 no.2
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    • pp.112-119
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    • 1995
  • Anatomical and biochemical changes of the corn root injured by the root lesion nematode, Pratylenchus vulnus, were examined to understand the interactions between the nematode and the crop which can be applied to a breeding program for nematode-resistant crop. The nematode and the crop which can be applied to be a breeding program for nematode-resistant crop. The nematode entered the cortex of corn root through its epidemis. They moved to other cortical cells by breaking their cell walls. They, finally, gathered around the endodermis of the roots and the bases of the root hairs. Parasitism of the nematode formed cavities within the root tissues where the females laid eggs. Major root damage by the nematode occurred in the cortical cells where must cell walls were broken and crushed to form empty spaces. These empty spaces in the base of the root resulted in this breakdown. Damage-induced biochemical changes of the corn roots were analysed by their total protein patterns and esterase activities in both control and nematode-infected roots. Denaturing gel did not show any significant difference in the banding patterns between them. Esterase patterns and activities, also, were not significantly different between the infected and the control roots.

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