[Immunobiologically active compounds from skin].

This paper describes physiochemical and biological properties of 3 immunologically active compounds extracted by acetone from porcine skin. High pressure gel chromatography confirmed their heterogeneity. RP-HPLC of compound 2 (C2 or K-activin) also characterizes it as a heterogeneous entity. It was shown to inhibit proliferation of cultured fibroblasts from human fetuses and exhibit weak activity in general anaphylactic reaction (anaphylactic shock) and skin anaphylactic reaction. A summary of data on immunologically active compounds are presented with special emphasis laid on acetone-extractable K-activin.

[Development of fluoroquinolone (ciprofloxacin) resistance in Mycoplasma hominis in the presence of Hela cells]. / Formirovanie ustoichivosti Mycoplasma hominis k ftorkhinolonam (tsiprofloksatsinu) v prisutstvii kletok Hela.

The effect of cocultivation of eukaryotic HeLa cells and Mycoplasma hominis mycoplasma on the resistance of the latter to fluoroquinolones (ciprofloxacin) was examined. It was shown that cocultivation of the M. homonis and HeLa cells during 24 h with subsequent addition of ciprofloxacin resulted in an increase of the mircoplasma resistance to this antimicrobial agent. In the M. hominis cells cultivated in the presence of HeLa cells and the increasing concentration of ciprofloxacin mutations in the parC gene were observed only at low concentrations of the antimicrobial agent, while mutations in the gyrA gene were never detected. A gradual elevation of ciprofloxacin concentration up to 10 micrograms/ml resulted in the reversion of the parC mutations in mycoplasmas. Mycoplasma cells resistant to high flouroquinolone concentrations and isolated after cocultivation with the HeLa cells were characterized by the wild-type genotype in respect of the gyrA and parC genes. It was shown for the first time that infection of HeLa cells resulted in the appearance of genome rearrangements in M. hominis cells.

[The use of in situ polymerase chain reaction for detection the intracellular localization of Mycoplasma hominis in cultured HeLa cells]. / Ispol'zovanie metoda polimeraznoi tsepnoi reaktsii in situ dlia vyiavleniia vnutrikletochnoi lokalizatsii mikoplazmy Mycoplasma homonis v kul'tivirovannykh kletkakh HeLa.

Mycoplasma hominis was incubated with HeLa cells up to 72 h. Infection of HeLa cells was estimated by in situ polymerase chain reaction with a subsequent use of computer digital image analysis for result processing. The localization of mycoplasma in the cell nucleus was demonstrated after a 48 h incubation. The quantity of infected HeLa cells was increased with time to make 58 and 75% on days 2 and 3, respectively. No M. hominis was found in the cytoplasma of HeLa cells.