Alloimmunization Against Well Defined Polymorphic Major Histocompatibility or Class I MHC Transfected L Cells Antigens Can Prevent Poly IC Induced Fetal Death in Mice

METHOD : It is possible to induce increased fetal resorption in a number of inbred murine matings by injecting Poly (I) Poly (C12U) 3.5 days postconception, a maneuver associated with natural killer-mediated damage to the feto placental unit such as occurs in spontaneous fetal resorptions. RESULTS : We show here that alloimmunization can block this effect. In addition, maternal immune responses induced by alloimmunization against isolated mutant class I or class II, as well as by immunization with class I MHC alloantigens (K^d) transfected L cells are sufficient to restore normal fetal viability. It is not necessary that the maternal immune response be specifically directed against paternal alloantigens fr the fetal protecton to ensue, since the effect occurs in inbred matings when the mother is immunized against unrelated class I or class II alloantigens. As in previous studies conducted in the murine species, not all MHC alloimmunizations are protective. In addition, as control, immunization with a monomorphic class I MHC molecular (37), transfected L cells, sheep red blood cells or hen egg lysozyme is without effect. CONCLUSION : These results indicate that defined MHC antigens can mediate fetal protection from induced fetal resorption, and suggest that one driving force in promoting MHC antigen polymorphism in mammals is their capacity to confer protection from NK mediated fetal demise.     

Physico-chemical properties of DNA of human adenovirus type 6

Physico-chemical characteristics of human adenovirus type 6 DNA were studied. The sedimentation constant of adenovirus type 6 DNA was shown to be 32.7S. The intrinsic viscosity of DNA was on the average 93.8 dl/g. The average size of the molecular mass determined by the results of sedimentation and viscosimetry was 23.5 X 10(6) daltons which agreed favourably with the value calculated from the data of electron microscopic determination of the length of DNA molecule. The buoyant density of DNA in cesium chloride density gradient was 1.7126 g/cm3. The melting temperatures were 90.5 and 75 degrees C for 1 X SSC and 0.1 X SSC, respectively. Adenovirus type 6 DNA contained 52.6% GC pairs on the average.     

GC-pair distribution in the DNA of simian SA7 and human type 6 adenoviruses

The buoyant density values in cesium chloride of DNA fragments of simian adenovirus SA7 obtained with restricting endonucleases of R. EcoRI, R. BamHI, R. SalI and human adenovirus type 6 DNA fragments obtained with restricting endonucleases of R. EcoRI and R. BamHI were determined. On the basis of the buoyant density values for these fragments the content of GC pairs in them was calculated. Using the known position of the fragments in the physical map of these DNAs, the distribution of GC pairs along the examined DNA molecules was constructed.     

Surgical treatment of lung cancer patients with brain metastases

The authors present an experience with diagnosing and treatment of 16 patients suffering from lung cancer with solitary metastasis into the brain. The examination performed has shown that in 7 out of 16 patients the surgical treatment was found to be not expedient. This solution was based on the detection of an extensive spread of lung cancer: multiple metastasis outside the thoracic cavity and the brain or inside the brain, and in one case--due to a considerable reduction of indices of the functional and reserve capacities of respiration and blood circulation. Single-step operations were carried out in 9 patients with lung cancer with a solitary metastasis into the brain (resection of the lung with an ablation of the brain metastasis). Out of the 9 patients operated on 6 patients survived for as long as 1.5 to 2 years, one patient lived longer than 4 years. Two other patients operated upon in June 2003 and March 2004 are still alive and feel much better. Satisfactory results of treatment of these patients show such methods to be expedient.     

Antiproliferative action of swine leukocyte interferon and of an inhibitor of interferon action

The results of the study of the antiproliferative effect of swine leukocyte interferon and of an inhibitor of interferon effect in experimental mice with transplanted Krebs-2 ascitic carcinoma cells are presented. The interferon inhibitor exerted antiproliferative effect similar to that of native swine interferon. Combined use of swine interferon and interferon inhibitor did not lead to summation of the antiproliferative effect of these preparations.     

The filterability of whole blood (the role of leukocytes and erythrocytes)]

Filterability of the blood with various red cell and leukocyte concentrations was examined in 17 patients with coronary heart disease. The blood was filtered through a filter with pore diameter of 5 microns under a pressure of 100 cm water column. Blood filterability drastically deteriorated if leukocyte concentrations in the blood increased and depended on the leukocyte filtration characteristics. The number of red cells passed through the filter was in direct proportion with the blood red cell count.     

Disorders of lipid metabolism in patients with chronic diseases of the small intestine

Lipid metabolism was evaluated in patients with chronic enteritis, celiac disease, general variable immunodeficiency (GVI), short-bowel syndrome. In chronic enteritis with malabsorption syndrome degree I and II changes in metabolism were characterized by hyperlipidemia due to high lipid fractions, mainly triglycerides; in malabsorption syndrome degree III (celiac disease, general variable immunodeficiency, short-bowel syndrome) by a drop of serum total lipids, phospholipids, cholesterol, beta-lipoproteins, free fatty acids, elevated concentrations of triglycerides. Changes in fatty acid composition of blood serum in patients with malabsorption syndrome degree III manifested by derangement of polyunsaturated fatty acids ratio. Arachidonic acid concentration was reduced in 100% of cases, linolenic acid in 45%. In all the patients with celiac disease and malabsorption syndrome degree III there was hypoactivity of lipolytic blood enzymes lipase and tributyrinase.