Iron accumulation in human spleen in autoimmune thrombocytopenia and hereditary spherocytosis.

Background: Although the iron is an essential element for the physiological functions of cells, tissues and organs, it is also an important inductor of reactive oxygen species (ROS).

Material And Methods: Three groups of human spleen with autoimmune thrombocytopenia (AITP), hereditary spherocytosis (HS) and reference samples stained by haematoxylin and eosin, Perls' reaction for nonheme Fe(III) iron and Alcian blue for glycoconjugates detection were studied.

Results: Positive Perls' reaction in both AITP and HS groups was seen.

Cryoglobulinemia manifested by gangraene of almost all fingers and toes.

Cryoglobulinemia is a rather rare condition accompanying quite a broad spectrum of different states and diseases. Mixed or polyclonal cryoglobulins can be seen in patients with autoimmune disorders, chronic infections and lymphoproliferative disorders. Monoclonal cryoglobulins are often revealed in patients with multiple myeloma or Waldenström's macroglobulinemia.

Treatment of rat adjuvant arthritis with flavonoid (Detralex), methotrexate, and their combination.

In both adjuvant arthritis and rheumatoid arthritis, edema and inflammation appear in synovial joints. Edema or effusion reflects an imbalance in lymph dynamics. Purified micronized flavonoid fraction is mainly used in the treatment of chronic venous insufficiency.

Spironolactone differently influences remodeling of the left ventricle and aorta in L-NAME-induced hypertension.

Aldosterone receptor antagonist, spironolactone, has been shown to prevent remodeling of the heart in several models of left ventricular hypertrophy. The aim of the present study was to determine whether the treatment with spironolactone can prevent hypertension, reduction of tissue nitric oxide synthase activity and left ventricular (LV) and aortic remodeling in N(G)-nitro-L-arginine methyl ester (L-NAME)-induced hypertension. Four groups of rats were investigated: control, spironolactone (200 mg/kg), L-NAME (40 mg/kg) and L-NAME + spironolactone (in corresponding dosage).

Acute toxicity of magnetic nanoparticles in mice.

Objectives: The acute toxicity of magnetic nanoparticles was effectively lowered by their encapsulation with poly(D,L lactide). In relation to the idea to use magnetic nanoparticles in development of new delivery systems suitable for targeted drug administration, the toxicological profile of five types of magnetic fluids was assessed in mice.

Methods: The nanoprecipitation method was used to prepare magnetic fluids containing nanoparticles of Fe(3)O(4) encapsulated with biodegradable substances.