[Resistance of the hemato-encephalic barrier in tick-borne neural infection (Lyme disease and tick-borne encephalitis)]. / Rezistentnost' gematoéntsefalicheskogo bar'era pri kleshchevoi neiroinfektsii (bolezn' Laima, kleshchevoi éntsefalit).

The dynamic state of hematoencephalic barrier (HEB) was estimated in Russian tick-borne encephalitic (RTBE) and in meningeal syndrome (Lyme's disease, LD). The enzyme immunoassays of neurospecific proteins in blood serum such as alpha 1-BG and enolase (NSE) were performed in the course of disease. The break of HEB at blood-brain direction was proved in patients with RTBE and LD for the proteins mentioned above. The blood serum NSE levels as well as their dynamics confirmed the functional alteration of brain neurons' permeability in LD and pronounced destruction of such neurons in RTBE. The acute increase of blood NSE concentration was observed within some days before the development of clinical signs of paresis. The authors suppose that the enzyme immunoassays of neurospecific proteins which are of rather high value for HEB permeability and neuronal destruction control may be successfully applied in monitoring of both therapy's efficacy and individualization of pharmacotherapy.