Inhibition of K+ transport in human sickle cell erythrocytes by okadaic acid and sodium fluoride.
Journal - Clinical and experimental pharmacology & physiology (AUSTRALIA )
1. The effect of okadaic acid and sodium fluoride on swelling- and N-ethylmaleimide (NEM)-stimulated KCl cotransport was examined in blood cells from homozygote sickle cell anaemia patients. 2. Blood was drawn into heparin or EDTA by vein puncture from sickle cell patients previously diagnosed in the haematology clinics of Princess Badee'a Teaching Hospital. A standard method for measuring flux by using radioactive rubidium was used. 3. Okadaic acid strongly inhibited swelling-stimulated KCl cotransport if added before swelling. Okadaic acid and sodium fluoride added before NEM inhibited the activation of transport by NEM. Okadaic acid added after NEM did not inhibit transport. 4. The inhibition of the effects of NEM by okadaic acid and sodium fluoride indicates that activation of the flux by NEM requires the action of phosphatase.
|ISSN : ||0305-1870|
|Mesh Heading : ||Anemia, Sickle Cell Dose-Response Relationship, Drug Erythrocytes, Abnormal Ethylmaleimide Hemoglobin, Sickle Homozygote Humans Ion Transport Okadaic Acid Potassium Sodium Fluoride blood metabolism pharmacology genetics|
|Mesh Heading Relevant : ||drug effects pharmacology metabolism pharmacology|