scholarly journals THE EFFECTS OF ETHANOL ON GLUCOSE 6-PHOSPHATE DEHYDROGENASE ENZYME ACTIVITY FROM HUMAN ERYTHROCYTES IN VITRO AND RAT ERYTHROCYTES IN VIVO

2002 ◽  
Vol 37 (4) ◽  
pp. 327-329 ◽  
Author(s):  
M. E. Buyukokuroglu
Keyword(s):  
Enzyme Activity ◽  
Human Erythrocytes ◽  
Rat Erythrocytes ◽  
Dehydrogenase Enzyme ◽  
Glucose 6 Phosphate Dehydrogenase ◽  
Dehydrogenase Enzyme Activity

IN VITRO STEROIDOGENESIS IN NORMAL HUMAN OVARIAN TISSUE

1966 ◽  
Vol 52 (3) ◽  
pp. 455-464 ◽  
Author(s):  
Lakshmi Kumari ◽  
Joseph W. Goldzieher
Keyword(s):  
Enzyme Activity ◽  
Luteal Phase ◽  
Ovarian Tissue ◽  
Human Ovarian Tissue ◽  
Dehydrogenase Enzyme ◽  
Normal Human ◽  
Dehydrogenase Enzyme Activity

ABSTRACT Eleven samples of normal human ovarian tissue from the various phases of the cycle were incubated with 7-3H progesterone and 4-14C-5-pregnenolone. Isolation, identification and quantitation of the metabolites showed clearly that pregnenolone is a far better substrate than progesterone for the production of C19 steroids. Under the conditions of these incubations, 3β-ol dehydrogenase enzyme activity converted the majority of the metabolites into androstenedione. The accumulation of radioactive androstenedione at the end of the incubation exceeded that of testosterone except in the later part of the luteal phase.

scholarly journals Effects of Gentamicin Sulfate on Enzyme Activities of Carbonic Anhydrase from Human Erythrocytes in Vitro and from Rat Erythrocytes in Vivo

2002 ◽  
Vol 25 (8) ◽  
pp. 966-969 ◽  
Author(s):  
Sükrü Beydemir ◽  
Mehmet Çiftçi ◽  
Ömer Irfan Küfrevioglu ◽  
Mehmet Emin Büyükokuroglu
Keyword(s):  
Carbonic Anhydrase ◽  
Enzyme Activities ◽  
Human Erythrocytes ◽  
Rat Erythrocytes ◽  
Gentamicin Sulfate

Paradoxical effect of perchlorate on thyroidal weight, glucose 6-phosphate dehydrogenase and polyamines in methylthiouracil-treated rats

1981 ◽  
Vol 97 (4) ◽  
pp. 491-495 ◽  
Author(s):  
S. Matsuzaki ◽  
M. Suzuki
Keyword(s):  
Enzyme Activity ◽  
Control Level ◽  
Sodium Perchlorate ◽  
Inhibitory Effect ◽  
Paradoxical Effect ◽  
G6pdh Activity ◽  
Wet Weight ◽  
Glucose 6 Phosphate Dehydrogenase

Abstract. The effect of sodium perchlorate (NaClO4) on the methylthiouracil-induced increase in the activity of thyroid glucose 6-phosphate dehydrogenase (G6PDH), ornithine decarboxylase (ODC) and polyamine contents was studied in the rat. The G6PDH activity was increased nearly three-fold by methylthiouracil (MTU) but not by ClO4- at 7 days of treatment. Perchlorate lowered the MTU-induced enzyme activity to nearly the control level, without changing circulating thyrotrophin (TSH). The anion had no inhibitory effect on G6PDH activity in vitro. The possibility that an inhibitor specific for G6PDH was generated in ClO4- treated rat thyroids was excluded. The activity of ODC was greatly increased by both ClO4- and MTU, the increase being significant as early as on the second day of treatment. Perchlorate had no inhibitory effect on MTU-induced ODC activity in vivo but decreased total contents of spermidine and spermine in the thyroid, without affecting the concentration (nmoles/ g wet weight) of the polyamines. These results suggest that ClO4- acts directly on the thyroid to suppress specifically the stimulatory effect of TSH on G6PDH activity and possibly on polyamine accumulation.

Effects of some medical drugs on enzyme activities of carbonic anhydrase from human erythrocytes in vitro and from rat erythrocytes in vivo

2000 ◽  
Vol 42 (2) ◽  
pp. 187-191 ◽  
Author(s):  
Şükrü Beydemir ◽  
Mehmet Çİftçi ◽  
İsmail Özmen ◽  
Mehmet Emin Buyuk Okuroglu ◽  
Hasan Özdemir ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Enzyme Activities ◽  
Human Erythrocytes ◽  
Rat Erythrocytes
Sign in / Sign up

Export Citation Format

Share Document