Prediction and prevention of postoperative intra-abdominal adhesive complications in children

The aim of this work was to study the morphology of adhesion formation under the influence of ozone in the experiment, as well as the development of prediction criteria and methods for correcting increased adhesion in children.Materials and methods. Experimental studies were carried out on 36 rabbits «Shinshilla» with a body weight of 0.7–1.2 kg., of which 12 animals were included in the control group, which did not carry out ozonation of the abdominal cavity. The main group consisted of 24 rabbits, which were divided into two subgroups (12 animals in each subgroup), which ozonized the abdominal cavity with an ozone-oxygen mixture. In order to study the prognostic value of the acetylation phenotype in the formation of intraperitoneal adhesions, 67 children with symptoms of adhesive intestinal obstruction were examined.Results. The results of experimental studies showed that in animals of the control group there was the formation of massive adhesions. The basis of adhesions is connective tissue with a significant number of fibroblasts, blood vessels and collagen fibers. In animals of the main group, sharp inhibition of adhesion formation, a delay in the differentiation of fibroblasts and inhibition of their synthetic function were revealed. Acetylation phenotype was determined in 58 patients with appendicular peritonitis. 30 (51%) children turned out to be slow acetylators, and in 28 (49%) patients the phenotype of fast acetylation was established. The results of the study allowed us to isolate fast acetylators as a risk group for excessive adhesion formation and timely start therapeutic and preventive measures.

The effect of acetylation phenotype on the dynamic changes of indices of calcium metabolism and iron levels in liver detoxification on the background of experimental hypothyroidism

Background: Some studies of the characteristics of the calcium-phosphorus metabolism changes in experimental hypothyroidism given the phenotype of acetylation will allow to more effectively diagnose, predict the course and to carry out prevention and treatment of hypothyroidism and the accompanying pathological changes.The aim is to trace the dynamics of phosphorus-calcium metabolism and the level of serum iron in experimental hypothyroidism and to determine the severity of it changes depending on the type of acetylation.Methods: In experiments were used rats weighing 180-220g, who were divided into 2 main groups depending on the type of acetylation on α - slow and β - fast metabolizer (acetylators). Each group was modelled experimental hypothyroidism by the introduction of mercazolil at a dose of 5 mg, for 14 days. Each group was divided into 5 subgroups depending on the time of the study. Group of α-slow metabolizers (acetylators) were divided into the following subgroups: Iα - intact IIα - at the 4th hour of the study, IIIα - on the 1st week of the study, IVα - 2-week studies, Vα - on the 3rd week of the study.Results: In the study of the calcium concentration at the 4th hour of the study in subgroups with α - and β - acetylation phenotypes were observed the decrease by 12.0% and 10.5% respectively, and its level in the IIβ - subgroup was 5.3% lower than the IIα- subgroup. The concentration of calcium ions in Vα subgroup was lower than in the Iα sub-group was 12.0%, and the level of calcium in the blood serum of animals Vβ was lower compared to Iβ IIβ IIIβ Ivβ-90.9%, 72.7%, 80.0%, 80.9% respectively. Also relatively, Vα Vβ subgroups in the subgroup calcium concentration were lower at 81.8 percent.Conclusions: Belonging to a particular phenotype of acetylation affects the degree of severity of the changes of indices of calcium-phosphorus metabolism and serum iron in experimental hypothyroidism, the most significant differences between the values of their indicators were detected early and deadlines of the study.

Burkholderia thailandensis oacAMutants Facilitate the Expression ofBurkholderia mallei-Like O Polysaccharides

ABSTRACTPrevious studies have shown that the O polysaccharides (OPS) expressed byBurkholderia malleiare similar to those produced byBurkholderia thailandensisexcept that they lack the 4-O-acetyl modifications on their 6-deoxy-α-l-talopyranosyl residues. In the present study, we describe the identification and characterization of an open reading frame, designatedoacA, expressed byB. thailandensisthat accounts for this phenomenon. Utilizing theB. thailandensisandB. malleilipopolysaccharide (LPS)-specific monoclonal antibodies Pp-PS-W and 3D11, Western immunoblot analyses demonstrated that the LPS antigens expressed by theoacAmutant,B. thailandensisZT0715, were antigenically similar to those produced byB. malleiATCC 23344. In addition, immunoblot analyses demonstrated that whenB. malleiATCC 23344 was complemented intranswithoacA, it synthesizedB. thailandensis-like LPS antigens. To elucidate the structure of the OPS moieties expressed by ZT0715, purified samples were analyzed via nuclear magnetic resonance spectroscopy. As predicted, these studies demonstrated that the loss of OacA activity influenced the O acetylation phenotype of the OPS moieties. Unexpectedly, however, the results indicated that the O methylation status of the OPS antigens was also affected by the loss of OacA activity. Nonetheless, it was revealed that the LPS moieties expressed by theoacAmutant reacted strongly with theB. malleiLPS-specific protective monoclonal antibody 9C1-2. Based on these findings, it appears that OacA is required for the 4-Oacetylation and 2-Omethylation ofB. thailandensisOPS antigens and that ZT0715 may provide a safe and cost-effective source ofB. mallei-like OPS to facilitate the synthesis of glanders subunit vaccine candidates.