[Comparative diagnostic value of the analysis of the skeletal muscle and lymphocytes in mitochondrial diseases].

Cytochemical analysis of lymphocytes' enzymes may could be an alternative method to skeletal muscle biopsy in diagnosis of mitochondrial pathology. We investigated biopsies of skeletal muscles and cytochemical status of lymphocytes in 14 children with mitochondrial pathology. Lymphocytes were investigated also in 12 health children.

[Morphological and pathogenetic differences in the respiratory disorders of newborn infants in the first days of life based on data from the composition of tracheobronchial smears].

Six variants of pulmonary pathology are described basing on the differences in composition of tracheobronchial wash-offs. This composition was studied by electron microscopy and biochemical assay of phospholipids in 76 neonates during the first day of life as well as by structural investigation of the lungs in 16 children who had died within two days after birth. The composition of the tracheobronchial wash-offs was compared with lung alterations associated with intrauterine hypoxia, infection, delay of respiratory parenchyma development, brain trauma.

[Characteristics of infection in children during prolonged oxidative stress after radiation exposure].

In the article on discusses the problems of origin and duration of chlamydia and herpes-virus infection in children with chronic somatic pathology and different degrees of radiation stress in contaminated territories of Brianskaya region (the level of contamination according to 137Cs = 9.37-19.73 Ci/km2).

[Mitochondrial insufficiency in children].

Structural and functional disturbances closely associated with mitochondrial insufficiency are found in the nervous system elements, skeletal and smooth muscles, myocardium, kidneys, liver, gastrointestinal tract, endocrine glands, systems of hematopoiesis and immunity. Nosological and syndromic forms of mitochondrial pathology associated with mitochondrial or nuclear DNA mutations are characterized. The disease variants with symptomatic (may be secondary) or with presumable mitochondrial pathology are analyzed.