Ectonucleotidase Activity in Smooth Muscle Tissues of Rats with a Valproate Model of Autism.

Ectonucleotidases play an important role in regulating the level of extracellular nucleotides and nucleosides and are an important part of the regulation of the effects of adenosine and ATP on adenosine and P2 receptors, respectively. We have previously established the ambiguous effect of P2 receptor agonists on the contractile activity of smooth muscle tissue in rats with the valproate model of autism. In this work, HPLC was used to evaluate the activity of ectonucleotidases in the smooth muscle tissues of the internal organs of rats with a valproate model of autism.

[The clinical manifestations and pathogenetic characteristics of skeletal muscle involvement in rheumatoid arthritis].

The state of skeletal muscles was subjected to a comprehensive study in 106 patients with verified rheumatoid arthritis. Kinesthetic, thermography, electromyography, tensometry and morphohistochemical methods were employed together with determination of serum activity of creatine phosphokinase. The muscular syndrome of the disease was characterized by the presence of foci of myofibrosis manifesting as local painful indurations of different size and consistency.

[Lactate dehydrogenase and creatine kinase activity in nerve compression and myodystrophic syndromes of lumbar osteochondrosis].

The blood serum lactate dehydrogenase (LDH), creatine kinase (CK), and LDH isoforms activities have been measured in 103 patients with the compression neural and myodystrophic syndromes of lumbar osteochondrosis. The studies have revealed a relationship between the myodystrophic process severity and the intensity of LDH and CK ejection from the muscle into the blood, particularly in the trigger stage. The shift of LDH activity towards the predominance of slowly migrating isoforms augments and the total blood serum LDH and CK activities grow as the muscular syndrome progresses.