Recent Advances in Copper-Based Organic Complexes and Nanoparticles for Tumor Theranostics.

Treatment of drug-resistant forms of cancer requires consideration of their hallmark features, such as abnormal cell death mechanisms or mutations in drug-responding molecular pathways. Malignant cells differ from their normal counterparts in numerous aspects, including copper metabolism. Intracellular copper levels are elevated in various cancer types, and this phenomenon could be employed for the development of novel oncotherapeutic approaches.

Heparin-coated iron oxide nanoparticles: application as a liver contrast agent, toxicity and pharmacokinetics.

The prepared heparin-coated iron oxide nanoparticles (Hep-IONPs) contrasted cholangioma tumors in the liver in MRI. The NPs were not toxic to rats and rabbits after 14 days of consecutive IV injections as observed from the monitoring of the body weight and biochemical and hematological parameters. No embryotoxic or immunotoxic side effects of the material were detected.

Targeting Brain Tumors with Mesenchymal Stem Cells in the Experimental Model of the Orthotopic Glioblastoma in Rats.

Despite multimodal approaches for the treatment of multiforme glioblastoma (GBM) advances in outcome have been very modest indicating the necessity of novel diagnostic and therapeutic strategies. Currently, mesenchymal stem cells (MSCs) represent a promising platform for cell-based cancer therapies because of their tumor-tropism, low immunogenicity, easy accessibility, isolation procedure, and culturing. In the present study, we assessed the tumor-tropism and biodistribution of the superparamagnetic iron oxide nanoparticle (SPION)-labeled MSCs in the orthotopic model of C6 glioblastoma in Wistar rats.

Copper-Containing Nanoparticles and Organic Complexes: Metal Reduction Triggers Rapid Cell Death via Oxidative Burst.

Copper-containing agents are promising antitumor pharmaceuticals due to the ability of the metal ion to react with biomolecules. In the current study, we demonstrate that inorganic Cu in the form of oxide nanoparticles (NPs) or salts, as well as Cu ions in the context of organic complexes (oxidation states +1, +1.5 and +2), acquire significant cytotoxic potency (2-3 orders of magnitude determined by IC values) in combinations with N-acetylcysteine (NAC), cysteine, or ascorbate.

[Baroreflexes originated in vertebral artery zones upon peripheral vein tonus, systemic arterial blood pressure, and external respiration].

The investigation was intended to study the role ofbaroreceptors ofhemodynamically isolated zone of vertebral arteries in regulation of peripheral veins tonus, arterial pressure and external respiration. Pressure decrease in this vascular reflexogenic zone led to reflex responses of increase in femoral vein tonus, elevation of blood pressure level and stimulation of external respiration. The opposite reflex responses of cardio-respiratory functional system to initial pressure activation of vertebral arteries baroreceptors are observed.

[Hypoxic training -- effective method of raising skin vitality in cases of local plastic operations].

In spite of the complications after expander use the advantages of local plastics predetermine constant return to the method. Systemic use of hypoxic training produces stimulating effect on the skin microcirculation and can be used widely in clinical surgical practice in cases of local plastic operations to prevent possible complications reducing consequences of blood supply disturbance and tissue oxygen provision. The method of hypoxic adaptation let us receive as non-medicamentous mean to prepare for shorter period of time more vital flap.

[The effect of phonational load on parameters of cardiorespiratory system in hypotonic dysphonia].

Cardiointervalometry was used to investigate functional parameters of the cardiorespiratory system during text reading. A total of healthy women aged from 17 to 28 years and 11 women with hypotonic dysphonia 17 to 31 years of age entered the study. Both groups exhibited a low index of parasympathetic component of cardiorhythm regulation in shortening of the RR-interval.

[Desynchronization: mechanisms of development from molecular to systemic levels].

Striking progress in the field of molecular chronobiology has been made during the last years. It renders us to reconsider some traditional viewpoints concerning circadian system functioning. Not only we are able now to explain basic concept of how clock genes pass through transcriptional and post-transcriptional pathways and how circadian system eventually "comes to life" at the cellular level, but we are also in position to speculate on how the whole organism constitutes its space-temporal order and how certain ultradians and infradians could be generated.

[Role of carotid chemoreceptors in formation of adaptive reactions in animals].

After surgical denervation of sinocarotid reflexogenic zones and bilateral glomectomy in white laboratory rats oxygen consumption, rectal temperature, rate of cardial contractions and thermoregulatory activity of skeletal muscles display authentic increase. Glomectomy results in decreasing calorigecic effect of noradrenaline. Compensatory increase of thermoregulatory activity of sceletal muscles in response to beta-adrenogenic blocade with inderal in post-glomectomic animals is authentically less, than before inactivation of carotid receptors.

[Classification of hypoxia, hypo-, and hypercapnia].

The new classifications of hypoxical, hypo- and hypercapnical conditions are elaborated. They take into account the ecological factors in the development of various kinds of exogenic hypoxia, hypercapnia. For the first time the positive sides of physiological hypoxia and hypercapnia are brought in.

[Electrophysiological and neurochemical analysis of the biological effects of disturbances of Earth's magnetic field].

Geomagnetic effects on quantitative characteristics of alpha-rhythm were assessed by shifts in electroencephalograms recorded in 126 essentially healthy human subjects and changes in lipid metabolism in the cortex and white matter in 140 white rats. Indices of the geomagnetic activity were D, H and Z-components. The method of "epoch superposition" revealed an inconsistent alpha-rhythm depression and flattening out of the interhemispheric functional asymmetry against persistently high electrical activity in the right hemisphere, and biochemical asymmetry in consequence of different lipid transformation processes.

[Influence of geomagnetic activity on the cardiorespiratory system in healthy humans].

Changes in a number of respiration and circulation parameters during magnetic storms of varying intensity were analyzed in 126 normal humans belonging to two age groups: 19-21 yr. old young men and women (29 of each) and 51-53 yr. old men (n = 36) and women (n = 32).

[Specific aspects of hemostasis and lipid peroxidation in thrombocyte membranes during expedition and shift organization of labor].

The aim of the present study is to investigate dynamics of the hemostasis system and structural and functional state of thrombocyte membranes by the LPO and AOD parameters under the conditions of expedition and shift organization of labour of worker tripping from the West Siberia middle latitudes to the Far North. A trend to hypocoagulemia and increases in LPO and AOD reactions were characteristic of the type-1 (adaptive) reaction. The type-2 (hypotensive) reaction included a trend to hypercoagulemia, an increase in LPO and a decrease in AOD reactions in thrombocyte membranes as well as a hypertensive reaction during the whole shift period.