An Alteration of Lymphocytes Subpopulations and Immunoglobulins Levels in Patients with Diabetic Foot Ulcers Infected Particularly by Resistant Pathogens.

The aim of our study was to analyse immune abnormalities in patients with chronic infected diabetic foot ulcers (DFUs) especially those infected by resistant microorganisms. Methods. 68 patients treated in our foot clinic for infected chronic DFUs with 34 matched diabetic controls were studied. Patients with infected DFUs were subdivided into two subgroups according to the antibiotic sensitivity of causal pathogen: subgroup S infected by sensitive (n = 50) and subgroup R by resistant pathogens (n = 18). Selected immunological markers were compared between the study groups and subgroups. Results. Patients with infected chronic DFUs had, in comparison with diabetic controls, significantly reduced percentages (p < 0.01) and total numbers of lymphocytes (p < 0.001) involving B lymphocytes (p < 0.01), CD4+ (p < 0.01), and CD8+ T cells (p < 0.01) and their naive and memory effector cells. Higher levels of IgG (p < 0.05) including IgG1 (p < 0.001) and IgG3 (p < 0.05) were found in patients with DFUs compared to diabetic controls. Serum levels of immunoglobulin subclasses IgG2 and IgG3 correlated negatively with metabolic control (p < 0.05). A trend towards an increased frequency of IgG2 deficiency was found in patients with DFUs compared to diabetic controls (22% versus 15%; NS). Subgroup R revealed lower levels of immunoglobulins, especially of IgG4 (p < 0.01) in contrast to patients infected by sensitive bacteria. The innate immunity did not differ significantly between the study groups. Conclusion. Our study showed changes mainly in the adaptive immune system represented by low levels of lymphocyte subpopulations and their memory effector cells, and also changes in humoral immunity in patients with DFUs, even those infected by resistant pathogens, in comparison with diabetic controls.

Lipid levels and their genetic regulation in patients with familial hypercholesterolemia and familial defective apolipoprotein B-100: the MEDPED Slovakia Project.

We examined, from a cohort of 165 families, 529 individuals for familial hypercholesterolemia (FH). Utilising clinical criteria for diagnosis, we identified 122 patients (n=41 families) as having FH. With PCR testing, 31 individuals (n=12 families) were found to have familial defective Apo B-100 (FDB). From the cohort, 102 normolipidemic (NL) individuals served as a control group. Patients with FH had the highest levels of total cholesterol (TC), LDL-cholesterol (LDL-C) and apolipoprotein B (Apo B), followed by FDB patients and the normolipidemic relatives had the lowest levels (P<0.0001 for all parameters). We did not find any effect of Apo E genotypes on lipid levels in the NL or FH group. Therefore, other genetic and/or environmental factors may be responsible for the diversity in the clinical expression in these populations.