[Age-related changes in the choroid plexus of the brain include focal fibrosis of its villi.].

The choroid plexus of the cerebral ventricles is a highly vascularized villous structure that produces cerebrospinal fluid, forms the blood-cerebrospinal fluid barrier and regulates the exchange of biologically active molecules between blood and cerebrospinal fluid. The purpose of the work was to study the distribution of collagen fibers in the choroid plexus and determine the presence of type IV collagen in their composition. To identify collagen fibers, preparations were stained with aniline blue; the localization of type IV collagen was determined by immunohistochemistry.

25-Year Storage of Human Choroid Plexus in Methyl Salicylate Preserves Its Antigen Immunoreactivity.

Objective: Immunohistochemical investigation of archival histological material is a serious problem, since long-term storage of biological tissues, most often in formalin, leads to a loss of antigenic properties. However, the biological material can also be stored in the clearing agent methyl salicylate. The aim of this study was to assess the antigenicity of the human choroid plexus after extra long-term storage in methyl salicylate.

The theoretical modeling of the dynamic compaction process of forest soil.

Due to the growing demand for timber, forest soils are increasingly exposed to mechanical disturbances, caused by forestry equipment. Even though using skidding machines to transport wood is detrimental to the physical state of the soil, this method remains the most common. Hence, there is a need to model the impact of skidding systems on the upper (fertile) layer of the soil.

Modern Imaging Technologies of Mast Cells for Biology and Medicine (Review).

Mast cells play an important role in the body defense against allergens, pathogens, and parasites by participating in inflammation development. However, there is evidence for their contributing to the pathogenesis of a number of atopic, autoimmune, as well as cardiovascular, oncologic, neurologic, and other diseases (allergy, asthma, eczema, rhinitis, anaphylaxis, mastocytosis, multiple sclerosis, rheumatoid arthritis, inflammatory gastrointestinal and pulmonary diseases, migraine, etc.).

Changes in cytoplasmic and extracellular neuromelanin in human substantia nigra with normal aging.

Neuromelanin (NM) is a dark polymer pigment produced in certain populations of catecholaminergic neurons in the brain. It is present in various areas of the human brain, most often in the substantia nigra (SN) pars compacta and the locus coeruleus, the main centers of dopaminergic and noradrenergic innervation, respectively. Interest in NM has revived in recent years due to the alleged link between NM and the particular vulnerability of neuromelanin-containing neurons to neurodegeneration.