Reparative and neoplastic spheroid cellular structures and their mathematical model

Spheroid cell structures in the cell cultures have been described and are used for studying cell-cell and cell-matrix interactions. At the same time, spheroid cell structure participation in the repair and development of cancer in vivo remains unexplored. The aim of this study was to investigate the cellular composition of spherical structures and their functional significance in the repair of squamous epithelium in human papilloma virus-associated cervical pathology - chronic cervicitis and cervical intraepithelial neoplasia 1–3 degree, and also construct a mathematical model to explain the development and behavior of such spheroid cell structure.     

Transplantation of stem/progenitor cells of human brain into the brain of adult rats

We studied the development of stem/progenitor cells of the human brain transplanted in the adult rat brain after reproduction in an in vitro tissue culture. It was preliminarily shown by the immunological methods that the stem cells grown in a medium with growth factors formed neurospheres, which were heterogenous and contained both stem and progenitor cells of the human brain. The cells were implanted in the hippocampus, striatum, or lateral ventricle of the rat brain as a suspension or aggregates (neurospheres) and their behavior and differentiation were studies within 10, 20, and 30 days using the morphological and immunochemical methods. The cultured cells of the human brain continued their development in the rat brain, migrated, and formed neurons and astrocytes. The white mater fibers, lateral ventricle wall, and perivascular spaces served as the main pathways of migration. The neuronal differentiation was shown by staining with antibodies to beta-tubulin III, neurofilaments-70, and calbindin. Some growing nerve cells had long processes with growth cones. At the same time, some transplanted cells retained the undifferentiated state within one month after the implantation, as shown by the vimentin expression.     

The normalizing effect of dalargin on the glucocorticoid and opioid levels of the blood in CBA and C57Bl/6 mice undergoing footshock stress]

Radioreceptor investigations showed that it is impossible to interpret changes in the activity of opioid receptor ligands of mu and delta types in plasma of mice under footshock stress (FSS) as activation or depletion of opioid system (OS). There occurred qualitative changes characterized by interstrain differences (ID). These are also typical for dynamics of development of FSS effects on blood corticosterone levels. Administration of dalargin diminishes qualitative and quantitative changes in OS function at different periods after FSS preventing early rise of corticosterone levels after the exposure. In spite of common features in dalargin action on opioid and steroid metabolism in mice of both strains, ID are also present.     

New method of FACS analyzing and sorting of intact whole ovarian fragments (COPAS) after long time (24 h) cooling to 5 °C before cryopreservation

As recently announced by the American Society for Reproductive Medicine (ASRM), human ovarian tissue cryopreservation is an established option for fertility preservation in prepubertal girls and young women undergoing gonadotoxic treatments for cancer as well as some autoimmune diseases. Proper ovarian tissue assessment before and after cryopreservation is essential to increase success rates. Ovarian fragments from 16 patients were divided into small pieces in form of cortex with medulla, and randomly divided into the following two groups. Pieces of Group 1 (n?=?16) were frozen immediately after operation, thawed and just after thawing their quality was analyzed. Group 2 pieces (n?=?16) after operation were cooled to 5 °C for 24 h, then frozen after 24 h pre-cooling to 5 °C, thawed and just after thawing their quality was analyzed. The effectiveness of the pre-freezing cooling of tissue was evaluated by the development and viability of follicles (Calcein-AM and Propidium Iodide) using complex object parametric analyzer and sorter machine (COPAS). Positive effect of cooling of cells to low supra-zero temperatures on their future development after re-warming has been observed. New flow cytometry- technique is suitable for the evaluation and sorting of cryopreserved whole human whole intact ovarian fragments. Long time (24 h) cooling of ovarian tissue to 5 °C before cryopreservation has a trend of a cell viability increasing.

     

Sigma receptors of the loach embryo regulate ornithine decarboxylase activity

When loach embryos (Miagurnus fossilis) were incubated with opioid substance, sigma-receptors ligand SKF 10.047, activity of the key enzyme of polyamine synthesis - ornithine decarboxylase (ODC), increased. A correlation between teratogenic and ODC-stimulated action of SKF 10.047 was stage-specific and depend on opioid concentration. Possible mechanism of embryonic cell aggregation under SKF 10.047 action and polyamines role in that process is discussed.     

Spontaneous and induced production of the tumor necrosis factor by the blood cells of newborn infants

The authors determined activity of tumor-necrotizing factor in the blood serum from the umbilical cord and venous blood in children aged 5-6 years and in supernatants from the culture of mononuclear blood cells after its cultivation in the course of 24 h with bacterial products.     

Specific binding of (+)-3H-SKF 10047 by mouse splenocytes

Stereoselective, saturable, reversible and temperature-dependent binding of ligand of sigma opioid receptors (+)-3H-SKF 10047 to mouse splenocytes has been demonstrated. The estimated Kd value of this interaction (20-100 nM) was similar to that of (+)-3H-SKF 10047-sigma receptor complex. The binding capacity was 100 molecules per cell. A comparatively low affinity, non-stereoselective and temperature-independent binding of (+)-3H-SKF 10047 to mouse splenocytes has also been found.