• Title/Summary/Keyword: erythropoeitin

Search Result 3, Processing Time 0.019 seconds

Kinetics of Cultivating Mammalian Cells in Fed-Batch Process for the Production of Erythropoeitin (동물세포의 유가배양 공법에 의한 Erythropoeitin 생산에 관한 동력학적 연구)

  • 유호금;최석규;이윤수;신광순;황희구;이현용
    • Microbiology and Biotechnology Letters
    • /
    • v.19 no.5
    • /
    • pp.504-508
    • /
    • 1991
  • $1.85\times 10^{-10}$ (mmole/cell/h) of specific glucose consumption rate was obtained under fed-batch cultivation of recombinant mamalian ce11s with maintaining $4.7\times 10^{-7}(\mu g/ceil/h)$ of average specific erythropoeitin production rate. Higher maximum cell density was also achieved than for both cases of batch and perfusion cultivations. It proves that glutamolysis dominates metaboiic pathways at latter period of cultivation where quasi steady state was maintained. Substrate limitation of glucose concentration was estimated as 13 (mmole/l) under fed-batch conditions. while specific product production rate was decreased according to cultivation time, erythropoeitin production was increased as glucose concentration in the media increased up to 13.2 (mole/l).

  • PDF

System Analysis for Mass Cultivation of Mammalian Cells to Produce Erythropoeitin(EPO) (동물세포 대량배양에 의한 Erythropoeitin(EPO) 생산에 관한 고찰)

  • 이현용
    • KSBB Journal
    • /
    • v.4 no.1
    • /
    • pp.34-39
    • /
    • 1989
  • Growth kinetics of mammalian cell, Chinese Hamster Ovalry(CHO) was investigated to effectively produce pharmaceutically important Erythropoeitin under perfusion chemostat conditions. Perfusion rate, D is correlated with total viable is to be an essential factor in controlling growth kinetic parameters under this kind of operations. It is also found that the measurement of oxygen uptake rates is a relatively accurate method to understand cell growth, in case that the traditional cell count method is no longer useful due to heavy cell clumpings. True growth yield, Ymax and maintenance coefficient, me associated with mammalian cell growth were estimated as $2.86{\times}10^8$ cells/ g of glucose and 0.0063 g of glucose/ cells/ hr, respectively.

  • PDF

A Study on the Serologic Parameters in Petients with Anemia of Chronic Renal Failure-According to Erythropoietin Treatment (만성 신부전환자의 빈혈에 있어서 Erythropoietin 치료에 따른 혈청지표의 양상)

  • Lim, Jong-Sik;Kang, Ho-Jung;Park, Jong-Won;Do, Joon-Yeung;Yoon, Kyung-Woo
    • Journal of Yeungnam Medical Science
    • /
    • v.11 no.1
    • /
    • pp.82-93
    • /
    • 1994
  • Clinical study was carried out on the 64 hemodialysis patients(HD) with chronic renal failure who had been treated from December 1992 to July 1993 in Yeungnam University Hospital. The following results were obitained. In hematologic parameters, MCH was $28.8{\pm}2.0pg$, and MCV was $92.4{\pm}4.7fl$. Result revealed normochromic and normocytic anemia. Mean values of serum ferritin were $657.4{\pm}292.0ng/ml$ in men and $511.5{\pm}370g$ in women. Mean valuses of serum iron were $145.5{\pm}63.7{\mu}g/dl$. Mean values of transferrin saturation was $61.6{\pm}28.4%$. Serum frerritin, serum iron and transferrin saturation were higher in HD group than normal reference. In erythropoeitin treatment group, Hb and Hct were significantly higher than non-erythropoietin treatment group. Amount of transfusion was significantly higher in non-erythropoietin treatment group than erythropoeitin treatment group(p<0.05). Values of iron, transferrin saturation were significantly higher in abnormal liver function test(LFT) hemodialysis group than normal LFT group(p<0.05). Transfusion amounts revealed positive correlation with ferritin(r=0.4675), transferrin satruation (r=0.3823) and iron(r=0.3386)(p<0.05). In conclusion, erythropoietin treatment cna reduce requirement of blood transfusion and transfusion related side effects such as iron overload, hemosiderosis and hemochromatosis.

  • PDF